Aiet e&c lecture_notes

LECTURE NOTES
ON
ESTIMATION QUANTITY SUVEYING
AND VALUATION
IV B. Tech I Semester (JNTUH-R16)
By
DR.K.MOHAN DAS
PROFESSOR
DEPARTMENT OF CIVIL ENGINEERING
(ASHOKA INSTITUTE OF ENGINEERING AND TECHNOLOGY)
HYDERABAD - 500 043

UNIT - I
INTRODUCTION
TECHNICAL TERMS
1. ESTIMATE:An estimate is the anticipated or probable cost of work and is usually
prepared before the construction is taken up. It is indeed calculations or computations of
various items of an engineering work.
2. QUANTITY SURVEY: It is the schedule of all items of work in a building. These
quantities are calculated from the drawing of the building. Thus quantity survey gives
quantities of work done in case of each items, when priced gives the total cost. In short,
quantity survey means calculations of quantities of materials required to complete the work
concerned
3.SPECIFICATIONS :Detailed specifications gives the nature, quality and class of work,
materials to be used in the various parts of work , quality of the material, their proportions,
method of preparation, workmanship and description of execution of work are required.
4.RATES :The rates of various items of works, materials to be used in the construction and
the wages of different categories of labor (skilled and unskilled) should be available for
preparing an estimate. The cost of transportation charges should also be known. As far as
possible sanctioned “Schedule of Rates” shall be followed or the rates may be worked out
by the “Analysis of Rates” method.
5.SITE PLAN: It is the plan drawn for a particular construction showing its position with
respect to approaching roads, main bazars, markets and other permanent features in a
populated area. It shows the location of the area under construction with respect to the other
areas and on it generally the names of the owners of areas or property holders adjoining to it
are also denoted. North line is also clearly marked on it.
6. LINE PLAN Line plan can be defined as the plan of a particular construction simply
showing main features with the help of the single lines of different portions of the
constructions. Details of constructions are not generally shown on this plan. This inside and
outside dimensions shown on this plan should necessarily be corresponding to actual
dimensions.
7. INDEX PLAN :This is the plan of a particular colony showing the positions of different
houses in single lines their number if any position of roads, schools, market, hospitals and
other features etc. this plan is generally fixed on the entrance, or at exit or in the central
place of the colony, for the guidance of the inhabitants and outsiders.
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DETAILED PLAN : This plan indicates a plan of a construction drawn to a definite scale,
showing all detailed information required for its execution. Various sections and elevations are
clearly drawn on this plan.
CENTRE LINE PLAN : This is actually a layout plan drawn to facilitate the laying out of
foundation lines and other features. It is generally fixed on the entrance or at exit in the central
place of the colony for the guidance of the inhabitants and outsiders.
SUPPLEMANTARY ESTIMATE: When some additions are done in the original work, a
fresh detailed estimate is prepared to supplement the original work. This estimate is called
supplementary estimate. It is also accompanied by all the papers as required in thru detailed
estimate.
ADMINISTRATIVE APPROVAL: For any project required by the department an approval
so sanction of the competent authority with respect to the cost and work is necessary at the first
instance. Thus administrative aooroval denotes the formal acceptance by the administrative
department concerned of the proposals for incurring expenditure.
TECHNICAL SANCTION :It means the sanction and order by the competent authority of the
department for the detailed estimate design calculations quantities of work rates and cost of
work..after the technical sanction of the estimate is received the work is then taken up for
construction.
COMPETENT AUTHORITY: An officer or any other authority in the department to whom
relevant powers are delegated by the government (Financial Department).
ORDINARY MEASUREMENT BOOK: It is measured book in which entries regarding the work
done or supplies made and services performed are recorded for the purpose of making payments to the
contractors or the labor. Entries in the M.B are generally recorded by the sectional officers or by any
other officers deputed for the purpose
LUMPSUM ITEMS
Sometimes while preparing estimate for the certain small items like front architecture or decoration
work of a building it is not possible to workout detailed quantities so far such lump sum items a lump
sum rate is provided.
PLINTH AREA
The built up covered area of a building measured at floor level of any storey is called plinth area.
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17. CIRCULATION AREA
The total cost of construction including all expenditures incurred plus the cost of external servicesup to
the end of the completion of the work is called capital cost. It also includes the cost of preliminary
works, miscellaneous items and supervisioncharges etc.
1.1 GENERAL
Estimating is the technique of calculating or computing the variousquantities and the expected
Expenditure to be incurred on a particular work orproject. In case the funds available are less than the
estimated cost the work isdone in part or by reducing it or specifications are altered, the following
requirementare necessary for preparing an estimate.
1. Drawings like plan, elevation and sections of important points.
2. Detailed specifications about workmanship& properties of materials etc.
3. Standard schedule of rates of the current year.
1.2UNITS OF MEASUREMENTS
The units of measurements are mainly categorized for their nature, shape and size and for making
payments to the contractor and also. The principle of units of measurements normally consists the
following:
a) Single units work like doors, windows, trusses etc., is expressed in numbers.
b) Works consists linear measurements involve length like cornice, fencing, hand rail, bands
of specified width etc., are expressed in running meters (RM)
c) Works consists areal surface measurements involve area like plastering, white washing,
partitions of specified thickness etc., and are expressed in square meters (m2)
d) Works consists cubical contents which involve volume like earth work, cement
concrete, Masonry etc are expressed in Cubic metres.
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1.2.1 RULES FOR MEASUREMENT
The rules for measurement of each item are invariably described in IS- 1200.
However some of the general rules are listed below.
1. Measurement shall be made for finished item of work and description of each item shall
include materials, transport, labor, fabrication tools and plant and all types of overheads for
finishing the work in required shape, size and specification.
2. In booking, the order shall be in sequence of length, breadth and height or thickness.
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3. All works shall be measured subject to the following tolerances.
I. linear measurement shall be measured to the nearest 0.01m.
II. Areas shall be measured to the nearest 0.01 sq.m
III. Cubic contents shall be worked-out to the nearest 0.01 cum
4. Same type of work under different conditions and nature shall be measured separatelyunder
separate items.
5. The bill of quantities shall fully describe the materials, proportions, workmanships and
accurately represent the work to be executed.
6. In case of masonry (stone or brick) or structural concrete, the categories shall be measured
separately and the heights shall be described:
a) From foundation to plinth level
b) From plinth level to first floor level
c) From Fist floor to second floor level and so on.
1.3 REQUIREMENTS OF ESTIMATION AND COSTING
1. Estimate gives an idea of the cost of the work and hence its feasibility can be determined
i.e. whether the project could be taken up with in the funds available or not.
2. Estimate gives an idea of time required for the completion of the work.
3. Estimate is required to invite the tenders and Quotations and to arrange contract.
4. Estimate is also required to control the expenditure during the execution of work.
5. Estimate decides whether the proposed plan matches the funds available or not.
1.3.1 PROCEDURE OF ESTIMATING OR METHOD OF ESTIMATING.
Estimating involves the following operations
1. Preparing detailed Estimate.
2. Calculating the rate of each unit of work
3. Preparing abstract of estimate
1.3.2 DATA REQUIRED TO PREPARE AN ESTIMATE
1. Drawings i.e. plans, elevations, sections etc.
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2. Specifications.
3. Rates.
1.3.3 DRAWINGS
If the drawings are not clear and without complete dimensions the preparation of estimation become
very difficult. So, it is very essential before preparing an estimate.
1.3.4 SPECIFICATIONS
General Specifications: This gives the nature, quality, class and work and materials in general terms to
be used in various parts of wok. It helps no form a general idea of building.
Detailed Specifications: These gives the detailed description of the various items of work laying down
the Quantities and qualities of materials, their proportions, the method of preparation workmanship
and execution of work.
1.3.5 RATES
For preparing the estimate the unit rates of each item of work are required.
1. for arriving at the unit rates of each item.
2. The rates of various materials to be used in the construction.
3. The cost of transport materials.
4. The wages of labor, skilled or unskilled of masons, carpenters, Amador, etc.,
1.3.6COMPLETE ESTIMATE
Most of people think that the estimate of a structure includes cost of land, cost of materials and labor,
but many other direct and indirect costs included and are shown below.
L.S.Items.
The following are some of L.S. Items in the estimate.
1. Water supply and sanitary arrangements.
2. Electrical installations like meter, motor, etc.,
3. Architectural features.
4. Contingencies and unforeseen items.
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In general, certain percentage on the cost of estimation is allotted for the above L.S.Items Even if sub
estimates prepared or at the end of execution of work, the actual cost should not exceed the L.S.amounts
provided in the main estimate.
1.3.8 WORK CHARGED ESTABLISHMENT:
During the construction of a project considerable number of skilled supervisors, work assistance, watch
men etc., are employed on temporary basis. The salaries of these persons are drawn from the L.S.
amount allotted towards the work charged establishment. That is, establishment which is charged
directly to work. AnL.S.amount of 1½ to 2% of the estimated cost is provided towards the work charged
establishment.
1.4 METHODS OF TAKING OUT QUANTITIES
The quantities like earth work, foundation concrete, brickwork in plinthand super structure etc., can be
workout by any of following two methods:
a) Long wall - short wall method
b) Centre line method.
c) Partly centre line and short wall method.
1.4.1 LONG WALL-SHORT WALL METHOD
In this method, the wall along the length of room is considered to be longwall while the wall
perpendicular to long wall is said to be short wall. To get thelength of long wall or short wall, calculate
first the centre line lengths of individual walls. Then the length of long wall, (out to out) may be
calculated after adding half breadth at each end to its centre line length. Thus the length of short wall
Measured into in and may be found by deducting half breadth from its centre linelength at each end.
The length of long wall usually decreases from earth work tobrick work in super structure while the
short wall increases. These lengths aremultiplied by breadth and depth to getquantities.
1.4.2 CENTRE LINE METHOD
This method is suitable for walls of similar cross sections. Here the totalcentre line length is multiplied
by breadth and depth of respective item to get thetotal quantity at a time.
When cross walls or partitions or verandah walls joinwith main all, the centre line length gets reduced
by half of breadth for eachjunction. Such junction or joints are studied carefully while calculating
total centreline length. The estimates prepared by this method are most accurate and quick.
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1.4.3 PARTLY CENTRE LINE AND PARTLY CROSS WALL METHOD
This method is adopted when external (i.e., around the building) wall isof one thickness and the internal
walls having different thicknesses. In such cases,centre line method is applied to external walls and long
wall-short wall method isused to internal walls. This method suits for different thicknesses walls and
differentlevel of foundations. Because of this reason, all Engineering departments arepracticing this
method.
1.4.4 DETAILED ESTIMATE
The preparation of detailed estimate consists of working out quantities of various items of work and
then determines the cost of each item. This is prepared in two stages.
I) DETAILS OF MEASUREMENTS AND CALCULATION OF QUANTITIES
The complete work is divided into various items of work such as earth work concreting, brick work,
R.C.C. Plastering etc., The details of measurements are taken from drawings and entered in respective
columns of prescribed preformed. The quantities are calculated by multiplying the values that are in
numbers column to Depth column as shown below:
Details of measurements form
ii)
Abstract of Estimated Cost:
The cost of each item of work is worked out from the quantities that already computed in the details
measurement form at workable rate. But the total cost is worked out in the prescribed form is known as
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abstract of estimated form. 4%of estimated Cost is allowed for Petty Supervision, contingencies and
Unforeseen items.
Types of Estimates
ABSTRACT OF ESTIMATE FORM
The detailed estimate should accompanied with
I) Report
ii) Specification
iii) Drawings (plans, elevation, sections) iv)
Design charts and calculations
v)Standard schedule of rates.
1.4.5 FACTORS TO BE CONSISDERED WHILE PREPARING DETAILED
ESTIMATE
i) Quantity and transportation of materials:
For bigger project, the requirement of materials is more. such bulk volume of materials will be
purchased and transported definitely at cheaper rate.
ii) Location of site:
The site of work is selected, such that it should reduce damage or in transit during loading,
unloading, stocking of materials.
iii) Local labor charges:
The skill, suitability and wages of local labors are considered while preparing the detailed
estimate.
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1.4.6 DATA
The process of working out the cost or rate per unit of each item is called as Data. In
preparation of Data, the rates of materials and labor are obtained from current standard scheduled of
rates and while the quantities of materials and labor required for one unit of item are taken from
Standard Data Book.
1.4.7 FIXING OF RATE PER UNIT OF AN ITEM
The rate per unit of an item includes the following:
1) Quantity of materials & cost:
The requirement of materials is taken strictly in accordance with standard data
book(S.D.B). The cost of these includes first cost, freight, insurance and transportation
charges.
2) Cost of labour:
The exact number of labourers required for unit of work and the multiplied by the wages/ day
to get of labour for unit item work.
3) Cost of equipment (T&P):
Some works need special type of equipment, tools and plant. In such case, an amount of 1 to
2% of estimated cost is provided.
4) Overhead charges:
To meet expenses of office rent, depreciation of equipment salaries of staff postage, lighting
an amount of 4% of estimate cost is allocated.
1.4.8 METHODS OF PREPARATION OF APPROXIMATE ESTIMATE
Preliminary or approximate estimate is required for studies of various aspects of work of
project and for its administrative approval. It can decide, in case of commercial projects, whether the
net income earned justifies the amount invested or not. The approximate estimate is prepared from the
practical knowledge and cost of similar works. The estimate is accompanied by a report duely
explaining necessity and utility of the project and with a site or layout plan. A percentage 5 to 10% is
allowed for contingencies. The following are the methods used for preparation of approximate
estimates.
a) Plinth area method
b) Cubical contents methods
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c) Unit base method.
1.4.9 Plinth area method
The cost of construction is determined by multiplying plinth area with plinth area rate. The area is
obtained by multiplying length and breadth (outer dimensions of building). In fixing the plinth area
rate, careful observation and necessary enquiries are made in respect of quality and quantity aspect of
materials and labour, type of foundation, height of building, roof, wood work, fixtures, number of
storey’s etc., As per IS 3861-1966, the following areas
include while calculating the plinth area of building
Types of Estimates
a) Area of walls at floor level.
b) Internal shafts of sanitary installations not exceeding 2.0m2, lifts, air-conditioning ducts
etc.,
c) Area of barsati at terrace level: Barsati means any covered space open on
one side constructed on one side constructed on terraced roof which is used as shelter
during rainy season.
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d) Porches of non cantilever
type. Areas which are not to include
a) Area of lofts.
b) Unenclosed balconies.
c) Architectural bands, cornices etc.,
d) Domes, towers projecting above terrace level.
e) Box louvers and vertical sunbreakers.
1.4.10 Cubical Contents Method
This method is generally used for multistoreyed buildings. It is more accurate that the other two
methods viz., plinth area method and unit base method. The cost of a structure is calculated
approximately as the total cubical contents (Volume of buildings) multiplied by Local Cubic Rate. The
volume of building is obtained by Length x breadth x depth or height. The length and breadth are
measured out to out of walls excluding the plinth off set. The cost of string course, cornice, corbelling
etc., is neglected. The cost of building= volume of buildings x rate/ unit volume.
1.5PROBLEMS

1.5.1 Estimation of different foundations, steps and boundary walls. Example : 1
From the Drawing given below determine (a) Earth work excavation
(b) CC (1:5:10) Bed (c) R.R.Masonry in C.M. (1:6) (d)
Brick Work in C.M.(1:6).
Single Roomed Building (Load Bearing type structure)
1. From the Drawing given below determine (a) Earth work excavation
(b) CC (1:5:10) Bed (c) R.R.Masonry in C.M. (1:6) (d) Brick Work in
C.M.(1:6). by
(a) longwall - short wall method
(b) Centre line Method
QUESTION BANK PART- A
1. What are the difference between preliminary estimates, detailed estimates, supplementary
estimates and revised estimates ?
2. What do you understand by
a. Overhead cost
b. Analysis of rates
c. Contingencies and supervision charges
d. Standard measurements book
e. Prime cost

f. Provision of tools and pants and work charged establishment in an estimate.
g. Lump-sum items
3. Distinguish clearly between
a. Revised estimate and supplementary estimate
b. Administrative approval and technical sanction
c. Plinth area estimate and cube rate estimate
d. Contingencies and supervision charges
e. Preliminary estimate and detailed estimate
4. Explain the following
a. Schedule of rates
b. Cube rate estimate
c. Preliminary estimate
d. Provisional items
e. Carpet area
f. Revised estimate
g. Contingencies
h. Book value
i. Prime cost
j. Floor area
5. Discuss the merits and demerits of cubic meter method of approximate estimate.
6. Explain the following terms.
a. Record drawings
b. Standard measurement book
7. What conditions are to be fulfilled before taking up work in hand ?
8. What do you understand by detailed and general specification ?

9. When and where are the following estimates used
a. Annual repair estimate
b. Revised estimate
c. Supplementary estimate
10. What is mint by preliminary estimate?
11. What documents should be supplied along with preliminary estimate.
12. What are different types of Estimates?
13. Which of the methods can gives us the exact cost and why?
14. What are the various sub-heads of the report of an estimate of a building?
15. Explain the term provisional items.
PART - B
1. What are different types of Estimates? How do they differ from each other?
2. Prepare a preliminary estimate of a four storied office building having total carpet
area of 2000.sq.m for obtaining the administrative approval of the government, given the
following data . It may be assumed that 40% of the built up area will be taken up by corridors,
verandah, lavatories, staircase etc. Plinth area rate is Rs. 1325/- per Esq.
Extra for special architectural treatment 0.5% of building cost.
Extra due to deeper foundation at site 1% of building cost.
Extra for water supply and sanitary installation 8% of building cost.
Extra for internal electrical installation 12.5% of building cost.
Extra for other services 5% of building cost.
Contingencies - 2.5%
Supervision charges - 10 %
3. What are the various sub-heads of the report of an estimate of a building ? Support your
answer with a brief description.

4. What are the difference between preliminary estimates, detailed estimates, supplementary
estimates and revised estimates ?Under what circumstances each one is prepared and
what statements and drawings are to be attached with each one them. 5.
Explain what do you understand by
a. Overhead cost
b. Analysis of rates
c. Contingencies and supervision charges
d. Standard measurements book
e. Prime cost
f. Provision of tools and pants and work charged establishment in an estimate.
g. Lump-sum items
6. Explain the following general items of work involved in the estimation for a building
along with the process of calculations.
a. Earthwork in excavation.
b. Earthwork in filling.
c. Brick at soling.
d. Cement concrete in foundation.
e. Masonry work in foundation.
f. Damp proof course.
g. Masonry work in superstructure.
h. 10 cm thick brickwork.
7. Write down unit of measurement, unit rate of payment and mode of measurement
a. For the following general items of work.
b. Bellies.

8. Explain the following estimates
a. Detailed estimate
b. Repair estimate
c. Revised estimate and supplementary estimates due to reduction of cost
d. Quantity estimate.
9. Enumerate different methods for estimating building works along with a
suitableexample. List and explain any four approximate methods of estimating for buildings.
Measurement of Materials and Works Long wall - Short wall Method

ESTIMATION AND VALUATION UNIT II ESTIMATE OF BUILDINGS
TECHNICAL TERMS
1.RETAINING WALL
It is a structure designed and constructed to resist the lateral pressure of soil when there
is a desired change in ground elevation that exceeds the angle of repose of the soil.
2.AQUEDUCT
It is a water supply or navigable channel (conduit) constructed to convey water. In
modern engineering, the term is used for any system of pipes, ditches, canals, tunnels,
and other structures used for this purpose
3. ARCH
It is a structure that spans a space while supporting weight.
4. PITCHED ROOF
It is a roof structure where the roof leans to one side of the house
5.FLAT ROOF
It is a type of covering of a building. In contrast to the sloped form of a roof, a flat roof is
horizontal or nearly horizontal.
6.CULVERT
It is device used to channel water. It may be used to allow water to pass underneath a
road, railway, or embankment
7.FORMWORK
It is the term given to either temporary or permanent moulds into which concrete or
similar materials are poured. In the context of concrete construction, the false work
supports the shuttering moulds.

8.LOAD BEARING
It is one in which a wall of a structure bears the weight and force resting upon it,
conducting the vertical load from the upper structure to the foundation.
9.HANDRAIL
It is a rail that is designed to be grasped by the hand so as to provide stability or support.
10. TREAD:
It means horizontal upper portion of a step.
UNIT-II 2. 3
11. RISER:
This is the vertical portion of a step. It means the vertical distance between the horizontal
surfaces of two consecutive steps.
12. LANDING:
This is a horizontal platform provided at the head of a series of step.
13. NOSING:
This is the outer projecting edge of a tread.
14. FLIGHT:
This is consists of series of steps provided between the landings.
15. FLATSLAB:
A flat slab is reinforced concrete slab supported directly over the columns without
beams. Generally used when head room is limited. Such as in cellars and warehouses.
16. PANEL:
Panel is that the part of the slab bounded on each of its form sides by the centre line of
columns or center lines of adjacent spans.
17. DROP:

The drop panel is formed by increasing the thickness of slab in vicinity of supporting
column.
18. COLUMN HEAD:
The column head or capital located by flaring of the column at the top is primarily
intended to increase the punching shear of the slab.
19. BRICK MASONRY:
Masonry structures are built using masonry units and mortar.
20. MASONRY WALL:
Masonry walls are constructed using bricks and mortar.
21. MORTAR:
Masonry units are bonded together using mortars.

UNIT - 2
ESTIMATE OF BUILDINGS
2.1 Load bearing and framed structures
2.1.1 Load bearing (Problems on Plinth Area Method)
Example 2.1: Prepare an approximate estimate of building project with totalplinth area of allbuilding is
800 sqm. and from following data.
i) Plinth area rate Rs. 4500 per sqm
ii) Cost of water supply @7½%of cost of building.
iii) Cost of Sanitary andElectrical installations each @ 7½% of cost ofbuilding.
iv) Cost of architectural features @1% of building cost.
v) Cost of roads and lawns @5% of building cost.
vi)Cost of P.S. and contingencies @4% of building cost. Determine the total cost of
building project.
Solution:
Data given:
Plinth area = 800m2
Plinth area rate = Rs. 4500 per Sq.m
C
o
s
t
of building = 800 x 4500 = Rs. 36,00,000=00

Example 2:The plinth area of an apartment is 500 sqm. Determine the totalcost of building
from the following data:
E
xample3: The plinth area and plinth area rate of a esidential building are100 sqm and
Rs.5000/- respectively. Determine the total cost of building assumingsuitable provisions.
Example
4 :Prepare an
approximate Estimate of a proposed building from the following?

Plinth area of the building = 226 sqm.
Cost of the structure = 2500 per sqm.
Water supply and sanitary arangements = 12½%
Electrification =7%
Fluctuation of rates = 5% petty
supervision charges = 3%
Sol: Cost of Building = 226x 2500 = Rs.5,65,000
Water supply & Sanitary arrangements @ 12½ %

2.1.2 Cubical content Method:
Example 5 :Prepare the rough estimate for a proposed commercial complexfor a municipalcorporation
for the following data.
Plinth Area = 500m2/floor Ht of
each storey = 3.5m
No. of storey’s = G+2
Cubical content rate = Rs. 1000/m3
Provided for a following as a percentage of structured cost
a) water supply & Sanitary arrangement -8%
b) Electrification -6%
c) Fluctuation of rates - 5%
d) Contractors profit - 10%
e) Petty supervision & contingencies - 3%
Sol :
Cubical content = No. of storey’s (Plinth Area x height of each storey)= 3(500x3.5) =
5250m3 Structural cost = Cubical content x cubical content rate= 5250 x 1000 = 52.5 Lakhs
Examp
le 2.6:
2.1.3 Unit Base Method
Prepare

an approximate estimate or rough cost estimate of ahospital building for50 beds. The cost of
construction al together for each bed is Rs. 60,000/-. Determine the total cost of hospital building.
Solution:
No. of beds = 50
Cost of construction = Rs. 60,000/-
Total Cost of Hospital building = 50x 60,000= Rs. 30,00,000/-
Example 2.7: To prepare the rough cost estimate of a hostel building whichaccommodate 150students.
The cost of construction including all provisions isRs. 15,000/- per student. Determine total cost of
building.
Solution :
No.of students= 150
Cost of construction including all L.S. provisions = Rs.
15,000/-Total Cost of hostel building =150 x 15000 = Rs.
22,50,000/-(Rupees twenty two lakhs, fifty thousand only)
Example 2.8: From the given figure below calculate the detailed and abstract estimate for thesingle
roomed building (Load bearing type structure) by
a) long wall & short wall method
b) Centre Line Method

Example :2.9 From the given figure below calculate the details and abstract estimate for
thedouble roomed building (Load bearing type structure) by a) long wall & short wall method
(b) Centre Line Method

Example 2.10 From the given figure below calculate the details and abstractestimate for thesingle
Storied residential buildingwith no of rooms (Load bearing type structure) by Centre Line Method
2. 22

2.1.4 FRAMED STRUCTURES
Example 2.11 From the given figure below calculate the details and abstractestimate for the
single storied residential building withno. of rooms (Framed Structured type) by Centre
Line Method

Example 2.12 From the given figure below calculate the details and abstractestimate for the
two storied residential building withno. of rooms (Framed Structured type) by Centre Line
Method

2.1.5 PITCHED ROOF
Example 2.13Estimate the Quantities of the pictured roof shown in figure
a) Size of common rafter = 80x40mm
b) Size of ridge piece = 120x 200mm
c) Size of eaves board = 20 x 300mm
2.1.6 STAIRCASE
Example 2.14Calculate the quantities of items of the stair case of the figure shown in below.

2.1.7 COMPOUND WALL
Example 2.15 From the given figure below calculate the details estimate for the Compound Wall
Note: 1) Brick
Pillars of size
230x 230 size are
built every 3
meters 2) The
expansion joints are provided for every 6m length
Example 2.16Estimation of basement steps (one way)

UNIT - III
SPECIFICATION AND RATE ANALYSIS
3.1 GENERAL OR BRIEF SPECIFICATION:
This gives the nature and class of the work and materials in general terms, to be used in the various
parts of work, from the foundation to the superstructure. It is a short description of different parts of
work specifying materials, proportions, qualities, etc., General specifications give general idea of the
whole work or structure and are useful for preparing for estimate
3.2 DETAILED SPECIFICATIONS
3.2.1 DETAILED SPECIFICATIONS OF EXCAVATIONS, FILLING AND
BACKFILLING
Scope of Work
The scope for work covered under this specifications pertain to excavation of foundations,
trenches, pits and over areas, in all sorts of soil, soft and hard rock, correct to dimensions given in the
drawing including shoring, protections of existing underground utilities of any, such as water lines,
electric cables etc. dewatering and shoring if necessary, stacking the useful materials as directed
within the lead specified, refilling around the foundation and into the plinth with selected useful
excavated earth and disposing off the surplus earth / materials within specified lead and finishing the
surface to proper levels, slopes and camber etc. all complete.
Site Clearance:
Before the earth work is started the area coming under cutting and filling shall be cleared of
all obstruction, loose stones, shrubs, rank vegetation, grass, bushes and rubbish removed up to a
distance of 150 metres outside the periphery of the area under clearance. This work is deemed to be
included in the earthwork item rate and no separate payment will be admissible.
Roots and Vegetation clearance: The roots of trees if any shall be removed to a minimum
depth of 60 cm below ground level or a minimum of 30 cm below formation level whichever is
lower and the hollows filled up with earth leveled and rammed. This work is deemed to be included
in the earthwork items and no separate payment will be admissible for the work. Any material
obtained from the site will be the property of the Government of India and the useful materials as
decided by the Engineer-in-charge will be conveyed and properly stacked as directed within the lead
specified.

Setting out and making profiles:
Masonry or concrete pillars will be erected at suitable points in the area to serve as
benchmarks for the execution of the work. These benchmarks shall be connected with G.T.S. or any
other permanent benchmark approved by the Engineer-in-charge. Necessary profiles with pegs,
bamboos and strings or Burjis shall be made to show the correct formation levels before the work is
started. The contractor shall supply labour and materials for setting out and making profiles and
Burjis for the work at his own cost and the same shall be maintained during the excavation work. The
Department will show grid co-ordinate or other reference points. It shall bethe responsibility of the
contractor to set out center lines correctly with reference to the drawings and install substantial
reference marks. Checking of such alignment by the Department will not absolve the contractor from
his responsibility to execute the work strictly in accordance with the drawings.
Excavation:
The contractor shall notify the Engineer-in-charge before starting excavation and before the
ground is disturbed, to enable him to take existing level for the purpose of measurements. The
ground levels shall be taken at 5 to 15 metres intervals in uniformly sloping ground and at closer
distance where local mounds, pits, or undulations are met with, as directed by the Engineer-in-
charge. The ground levels shall be recorded in field books and plotted on plans, which shall be
signed by the Contractor and the Engineer-in-charge, before the earthwork is actually started. The
labour required for taking levels, shall be supplied by the Contractor at his own cost. The Contractor
shall perform excavation in all types of soils, murrum, soft and hard rock, boulders etc. in
foundation, over areas and in trenches to widths, lines, levels, grades and curves as shown in the
drawing or lesser widths, lines, levels, grades and levels as directed by the Engineer-in-charge and
per items in the schedule of quantities.
The item in the schedule of quantities shall specify the excavation in trenches or over areas.
For this purpose, the excavation for any depth in trenches for foundation not exceeding 1.5m in
width or 10sqm. on plan shall be described as excavation in foundation trenches. Excavation
exceeding 1.5m in width as well as 10sqm. on plan (excluding trenches for pipes, cables etc.) and
exceeding 30cm in depth shall be described as excavation over areas. Excavation exceeding 1.5m in
width as well as 10sqm. on plan but not exceeding 30cm. in depth shall be described as surface
Excavation.

Classification of Earth work:
The earthwork shall be classified under the following main categories and measured
separately for each category. All types of soil, murrum, boulders, Soft rock, Hard rock.
All types of Soils, Murrum, Boulders:
This includes earth, murrum, top deposits of agricultural soil, reclaimed soil, clay, sand or any
combination thereof ad soft and hard murrum, shingle etc. which is loose enough to be removed with
spadies, shovel and pick axes. Boulders not more than 0.03 cum. in volume found during the course of
excavation shall also fall under this classification.
Excavation in Soft Rock:
This shall include all materials which are rock or hard conglomerate, all decomposed
weathered rock, highly fissured rock, old masonry, boulders bigger than 0.03 cum, in volume but not
bigger than 0.5 cum. and other varieties of soft rock which can be removed only with pick axes,
crow bars, wedges and hammers with some difficulty. The mere fact that the contractor resorts to
blasting and / or wedging and chiseling of reasons of his own, shall not mean the rock is classifiable
as hard rock.
Excavation in Hard Rock :
This includes all rock other than soft rock mentioned in para above 1.5.1 (b) viz. soft
rock, occurring in masses, boulders having approximate volume more than 0.5 cum. plain or
reinforced cement concrete, which can best be removed by chiseling and wedging where
blasting cannot be permitted owing to any restriction at site.
Excavation in Hard Rock by Chiseling and Wedging:
Where blasting is not permitted and if the Engineer-in-charge so desires, the excavation shall
be done by chiseling and wedging or any other agreed method.
Note: All the excavated hard rock obtained shall be stacked properly and neatly within thespecified lead
by the contractor as directed by the Engineer-in-charge
Excavation:
The excavation under all classifications in areas in trenches or in pits shall be carried out
systematically. Cutting shall be done from top to bottom and not under pining or under cutting will be

allowed. The bottom and sides of excavation shall be dressed to proper level, slopes, steps, camber
etc. by removing high spots and ramming thoroughly as directed by the Engineerin-charge. All the
excavation shall be carried out strictly to the dimensions given in the drawing. The width shall
generally be of the width of mudmat concrete and depth as shown in drawing or as directed by the
Engineer-in-charge, according to availability of the desired bearing capacity of soil below. Any
excavation if taken below the specified depths and levels, the contractor shall at his own cost fill up
such over cut to the specified level with cement concrete 1:4:8 in case of excavation in all types of
soils an with cement concrete 1:2:4 in case of excavation soft and hard rock. After the excavation is
completed, the contractor shall notify the Engineer-in-charge to that effect and no further work shall
be taken up until the Engineer-in-charge has approved the depth and dimensions an also the nature of
foundation materials, levels and measurements shall also be recorded prior to taking up any further
work.
Shoring:
Unless separately provided for in the schedule of quantities, the quoted rate for excavation
shall include excavation of slopes to prevent falling in soil by providing and / or fixing, maintaining
and removing of shorting, bracing etc. The contractor would be responsible for the design of shoring
for proper retaining of sides of trenches, pits etc. with due consideration to the traffic, superimposed
loads etc. shoring shall be of sufficient strength to resist the pressure and ensure safety from slips and
to prevent damage to work and property and injury to persons. It shall be removed as directed after
items for which It is required are completed should the slips occur, the slipped materials shall be
removed and slope dressed to a modified stable slope. Removal of the slipped earth will not be
measured for payment.
Dewatering:
Unless specifically provided for as a separate item in the schedule of quantities, rate shall also
include bailing or pumping out all water which may accumulate in the excavation during the progress
of further works such as mud mat concrete, R.C. footings, shuttering etc. either due to seepage,
springs, rain or any other cause and diverting surface flow by bunds or other means. Care shall be
taken to ensure that the water discharged sufficiently away from the foundations keep it free from
nuisance to other works in the neighborhood.
Disposal of Excavated Materials:
Antiquities:

Any finds of archeological interest such as relics of antiquity, coins, fossils or other articles of
value shall be delivered to the Engineer-in-charge and shall be the property of the Government.
Useful Materials:
Any material obtained from the excavation which in the opinion of the Engineerncharge is
useful, shall be stacked separately in regular stacks as directed by the Engineerincharge and shall be
the property of the Government. No material excavated from foundation trenches of whatever kind
they may be are to be placed even temporarily nearer than about 3m from the outer edge of
excavation. Discretion of the Engineer-in-charge in such cases is final. All materials excavated will
remain the property of the Department. Rate for excavation includes sorting out of the useful materials
and stacking them separately as directed within the specific lead. Material suitable and useful for
backfilling or there use shall be stacked in convenient place but not in such a way as to obstruct free
movement of materials, workers and vehicles or encroach on the area required for constructional
purposes. It shall be used to the extent required to completely backfill the structure to original ground
level or other elevation shown on the plan or as directed by the Engineer-in-charge. Materials not
useful in anyway shall be disposed off, leveled and compacted as directed by the Engineer -in-charge
within a specified lead. The site shall be left clan of all debris and leveled on completion.
Backfilling in sides of Foundations, Plinth, Under Floor etc:
The backfilling shall be done after the concrete or masonry has fully set and shall be done in
such a way as not to cause under-thrust on any part of the structure. Where suitable excavated
material is to be used for backfilling, it shall be brought from the place where it was temporarily
deposited and shall be used in backfilling. The scope of work for backfilling/ filling in foundation,
plinth, under floors etc. shall include filling for all the buildings covered under the contract. Surplus
earth available from one building, if required, shall be used for backfilling filling for other buildings
also within the specified lead mentioned in the item. All timber shoring and form work left in the
trenches, pits, floors etc. shall be removed after
their necessity ceases and trash of any sort shall be cleared out from the excavation. All the space
between foundation masonry or concrete and the sides of excavation shall be backfilled to the original
surface with approved materials in layers not exceeding 150mm, in thickness, watered and well
consolidated by means of rammers to at least 90% of the consolidation. Areas inaccessible to
mechanical equipment such as areas adjacent to walls and columns etc. shall be tamped by hand

rammer or by hand held power rammers to the required density. The backfill shall be uniform in
character and free from large lumps, stones. shingle or boulder not larger than 75mm. in any direction,
salt, clods, organic or other foreign materials which might rot. The backfilling in plinth and under
floor shall be well consolidated by means of mechanical or hand operated rammers as specified to
achieve the required density. Test to establish proper consolidation as required will be carried out by
the Department at rates specified. Two tests per 50 sqm. will be taken to ascertain the proper
consolidation. The cost of tests carried out will be recovered from the contractor’s bill.
Filling in Plinth and Under Floors:
After the available suitable excavated materials are exhausted as backfilling, the contractor
shall notify the Engineer-in-charge of the fact and levels taken jointly with Engineerin- charge. The
earth, murrum, sand, gravel etc. or such materials suitable for filling proposed to be filled under floors
and so mentioned in t he item of schedule of quantities shall then be brought to site from approved
locations and sources.
Earth Filling:
The earth, soft murrum etc. so brought shall be filled up in layers of 15 cm depth, each layer
being well watered and consolidated by approved hand or mechanical tampers or other suitable means
to achieve the required density.
Gravel or sand filling:
Gravel if required to be filled under floors, shall be single washed gravel of approved quality
and of size varying from 12mm t0 20mm. it shall be uniformly blind with approved type of soil and /
or sand to obtain full compaction. Gravel shall be filled in specified thickness and shall be well
watered and rammed entirely to the satisfaction of the Engineer-in-charge.If sand is required to be
filled under floors, it shall be clean, medium grained and free from impurities. The filled in sand
shall be kept flooded with water for 24hrs. to ensure maximum consolidation shall be done by the
contractor at his own cost. The surface shall then be well dressed and got approved from Engineer -
in-charge before any other work is taken over the fill.
Lead and Lift:
Lead: The lead for disposal / deposition of excavated materials shall be as specified in therespective
item of work. For the purpose of measurements of lead, the area to be excavated or filled or area on

which excavated material is to be deposited/ disposed off shall be divided in suitable blocks and
for each of the block, the distance between center lines shall be taken as the leads which shall be
measured by the shortest straight line route on the plan and not the actual route adopted.
Lift: Lift shall be measured from ground level. Excavation up to 1.5m depth below groundlevel and
depositing excavated material on the ground shall be included in the item of earthwork for various
kinds of soil. Extra lift shall be measured in unit of 1.5m or part thereof. Obvious lift shall only be
measured that is lifts inherent in the lead due to ground slope shall not be measured, except for lead
up to 250m. All excavation shall be measured in successive stages of 1.5m stating the commencing
level. This shall not apply to cases where no lift is involved as in hill side cutting.
Mode of Measurements:
All excavation in areas having depth more than 30cm. pits, trenches etc. shall be measured
net. The dimensions for the purpose of payment shall be reckoned on the horizontal area of the
excavations for the purpose of payment shall be reckoned on the horizontal area of the excavation at
the base for foundations of the walls, columns, footings, rafts or other foundations, multiplied by the
mean depth from the surface of ground determined by levels. Excavation for side slopes will not be
paid for. Excavation in areas having depths less than 30 cms. shall be measured as surface excavation
on square meter basis, mentioning the average depth of excavation.
Reasonable working space beyond concrete dimension required for waterproofing and
shuttering where considered necessary in the opinion of Engineer-in-charge will be allowed in
execution and considered for payment for underground water tank, sump septic tank etc.
Where direct measurements of rock excavation are not possible, volume of rock can be calculated on
the basis of length, breadth, and depth of stacks made at site as mentioned in para 1.5.1 (c). The net
volume shall be worked out by reducing it by 40% taking the voids into consideration as 40%.
Similarly to arrive at net quantity to be paid in the case of soil, reduction at 20% of corresponding
stack / truck measurements shall be made. The rate for excavation shall include carting and disposing
and leveling the excavated materials within the specified lead. The rate shall also be inclusive of cost
of all tools, plants, explosives, shoring, dewatering at various stages, labour, materials etc. to
complete all the operations specified.
The backfilling and consolidation in sides of foundation and in plinth with excavated material
will not be paid for separately. The rate quoted for excavation shall be deemed to have been included
the cost of stacking of excavated materials, conveying within the specified lead, picking of selected

stacked materials, conveying it to the place of final backfill, compaction to the required proctor
density etc. Payment for filling and consolidation inside the trenches, sides of foundations, plinth etc.
with selected materials brought by the contractor other than the excavated material, shall be paid for
separately as per the rates in schedule of quantities which includes cost of such materials/ excavation,
royalty, its conveyance within the specified lead, watering, consolidating, dressing etc. Actual
quantity of consolidated filling shall be measured and paid in cubic meters up to two places of
decimal. The rate quoted in cum. for items of excavation is deemed to include the necessary additional
quantity of excavation involved beyond the plan dimensions of the work which may be necessary to
be carried out for carrying out the work in an engineering made, decided upon by the contractor.
Therefore no extra payment will be made for any excavation done other than the required quantity as
per the plan dimension indicated in the drawings. Measurements for excavation over areas shall be
determined by levels or by "Dead men" or both at the discretion of the Engineer-in-charge. If however
the Engineer-in-charge decided on measurement by levels, levels of site shall be jointly taken and
recorded by the Engineerincharge or his representatives and the contractor, before commencement of
the work and after completion of the work and the quantity of work done shall be computed based on
these levels. The volume of earth work shall be computed based on "Simpson's formula ' or any other
approved method at the discretion of the Engineer-in-charge.
3.2.2ANTITERMITE TREATMENT:
General:
Pre constructional anti-termite treatment is a process in which soil treatment is applied to a
building in early stages of its construction. The purpose of anti-termite treatment is to provide the
building with a chemical barrier against the sub-terrain termites. Anti- termite treatment being a
specialized job, calls for thorough knowledge of the chemicals, soils, termite to be dealt with and the
environmental conditions, in order to give effective treatment and lasting protection to the property
undergoing treatment. It is therefore imperative that the works of anti-termite treatment should be got
executed through specialized agencies only. The specialized agency should be preferably a member of
the Indian pest control Association and shall have sufficient experience of carrying out similar works
of magnitude envisaged in this tender.
The pre constructional soil treatment is required to be applied during the construction stages
of the sub-structure up to plinth level. The contractor has to be watchful of the various stages of sub-
structure works and arrange to carry out the soil treatment in time after proper coordination with
Department and other contractors if any, working at site.

Scope:
The scope of pre constructional anti-termite treatment covers the soil treatment with approved
chemicals in water emulsion in foundation trenches for columns, plinth beams, plinth filling, at
junction of walls and floor, in expansion joints etc. in stages as detailed in this specifications and
drawings. Unless otherwise stipulated, the anti-termite treatment will be carried out as per IS 6313
(part II) 1981 and / or as per direction of the Engineer-incharge.
Site preparation:
In order to ensure uniform distribution of the chemical emulsion and to assist penetration, the
following site preparation shall be carried out:
a) Remove all trees, stumps, logs or roots from the building site.
b) Remove all concrete form work if left anywhere, leveling pegs, timber offcuts and
other building debris from the area to be treated.
c) If the soil to be treated is sandy or porous, preliminary moistening will be required
to fill capillary spaces in soil in order to prevent the loss of emulsion through
piping or excessive percolations.
d) In the event of water logging of foundation, the water shall be pumped out before
application of chemical emulsion and it should be applied only when the soil is
absorbent.
e) On clays and other heavy soils where penetration is likely to be slow and on
sloping sites, where run-off of the treating solution is likely to occur, the surface of
the soil should be scarified to a depth of 75mm at least.
f) All sub-floor leveling and grading should be completed. All cutting trenches and
excavations should be completed with backfilling in place, borrowed fill must be
free from organic debris and shall be well compacted. If this is not done
supplementary treatments should be made to complete the barrier.

Chemical to be used:
The effectiveness of chemical depends upon the choice of the chemical, the dosage adopted
and the thoroughness of application. The chemical solutions or emulsions are required to be dispersed
uniformly in the soil and to the required strength so as to form an effective chemical barrier which is
lethal and repellent to termites.
Soil treatment:
One of the following chemicals in water emulsion, after approval from the Engineerincharge shall be
used uniformly over the area to be treated.
Mode and Rate of Application:
The chemical emulsion as stated above will be applied uniformly by sprayers at the
prescribed rates as detailed below in all the sages of the treatment.
Treatment in Foundation Trenches:
In case of normal wall load bearing structures, columns pits, wall trenches and basement, the
treatment shall be at 5 litres/sqm. or surface area of the bottom and sides to a height of at least
300mm. After the foundation work, the sides shall be treated at 7.5 litres/sqm. of vertical surface of
substructure on each side. After the earth filling is done, treatment shall be done by rodding the earth
at 150mm centers close to wall surface and spraying the chemical with the above dose i.e. 7.5
litres/sqm. In case of framed structure, the treatment shall start at adepth of 500mm below ground
level. From this depth the backfill around the columns, beams and R.C.C. basement walls shall be
treated at 7.5 litres / sqm. of the vertical and at 5 litres / sqm. for the horizontal surface at the bottom
in the trenches / pits.
Treatment on Top Surfaces on Plinth Filling:
The top surface of the filled earth within plinth walls shall be treated with chemical
emulsion at the rate of 5 litres/sqm. of the surface area before sub-base to floor is laid. If filled earth
has been well rammed and the surface does not allow the emulsion to seep through, holes up to 50 to
75mm deep at 150 mm centers both ways shall be made with crow bars on the surface to facilitate
saturation of the soil with the emulsion.

Treatment at Junction of Walls and floors:
Special care shall be taken to establish continuity of the vertical chemical barrier on the
inner wall surfaces from the finished ground level (or from level where the treatment had stopped)
up to the level of the filled earth surface. To achieve this a small channel 30 X 30 mm. shall be made
at all the junctions of wall / column with floor (before laying subgrade) and rod holes made in the
channel up to the finished ground level at 150mm apart and the iron rod moved backward and
forward to break the earth and chemical emulsion poured along the channel at 7.5 litres (or at
recommended quantity per sqm. of the vertical wall / column surfaces so as to soak the soil right up
to the bottom. The soil shall be tamped back into place after this operation.
Treatment for Expansion Joints:
The soil beneath the expansion joins shall receive special attention when the treatment under 2.5.1
above is in progress. This treatment shall be supplemented by treating through the expansion joint
after sub-grade has been laid at the rate of 2 litres per metre length of expansion joint.
Precautions during Treatment:
1. Utmost care shall be taken to see that the chemical barrier is complete and
continuous. Each part of the area shall receive the prescribed dosage of chemical emulsion.
2. The treatment should not be carried out when it is raining or when the soil is wet with
rain or sub-soil water.
3. Once formed, the treated soil barrier shall not be disturbed. If by chance, treated soil
barriers are disturbed, immediate steps shall be taken to restore the continuity and
completeness of the barrier system.
Precautions for Health Hazards and Safety Measures:
All the chemicals mentioned above are poisonous and hazardous to health. These
chemicals can have an adverse effect upon health when absorbed through the skin, inhaled as
vapours or spray mist or swallowed. Persons handling or using these chemicals should be warned of
these dangers and advised that absorption through the skin is the most likely source of accidental
poisoning. They should be cautioned to observe carefully all the safety precautions particularly when
handling these chemicals in the form of concentrates. These chemicals are usually brought to the site
in the form of emulsifable concentrates. The containers should be clearly labeled and should be stored

carefully out of the reach of children and pets animal. They should be kept securely locked. Particular
care should be taken to prevent skin contact with concentrates. Prolonged exposure to dilute
emulsions should also be avoided. Workers should wear clean clothing and should wash thoroughly
with soap and water especially before eating. In the event of severe contamination, clothing should be
removed at once and the skin washed with soap and water. If chemicals splash into the eyes they shall
be flushed with plenty of water and immediate medical attention should be sought.
The concentrates are oil solutions and present a fire hazard owing to the use of petroleum
solvents. Flames should not be allowed during mixing. Care should be taken in the application of
chemicals / soil toxicants to see that they are not allowed to contaminate wells or springs and other
sources of drinking water.
Guarantee :
The contractor has to furnish the guarantee for 10 (ten) years from the date of completion of
work, starting that in case of reappearance of termites within the building area due to defective
materials or workmanship or due to any other reasons, the contractor will arry out the necessary post
constructional treatment to keep the entire area free from termite, once again, without any extra cost to
the Department during the guarantee period.
Mode of measurement:
The payment will be made on the basis of plinth area measurements at ground floor only for
all the stages of treatment in sqm. correct to two places of decimals. Rate includes the cost of
materials, labour and all tools, plants, sprayers required for complete operation.
3.2.3 HARD CORE / SOLING UNDER FLOORS / FOUNDATIONS:
Scope of work:
The work covered under this specification includes all type of soling work either by bricks or
by rubble stones laid under floors / foundations, hand packed, complete as per specification mentioned
below and applicable drawings.

Rubble Stone Soling:
The rubble stone shall be of best variety of black trap / granite / basalt or other approved-
variety of stone available locally. The stone shall be hard, durable free from defects and of required
size and shall be approved by the Engineer-in-charge.
Preparation of Surface:
The bed on which rubble soling is to be laid shall be cleared of all loose materials, leveled,
watered ad compacted and got approved by the Engineer-in-charge before laying rubble soling. Cable
or pipe trenches if shown in the drawing and as required by the Engineer-in-charge shall be got done
before the soling is started.
Workmanship:
Over the prepared surface, the stone shall be set as closely as possible and well packed and
firmly set. The stones shall be of full height and shall be laid so as to have their bases of the largest
area resting on the sub-grade. Soling shall be laid in one layer of 230mm or 150mm depth or specified
thickness of soling with a tolerance of 25mm. After packing the stones properly in position, the
interstices between them shall be carefully filled with quarry spoils or stone chips of larger size
possible to obtain a bard, compact surface. Spreading of loose spoils or stone chips is prohibited. The
entire surface shall be examined for any protrusions and the same shall be knocked off by a hammer
and all interstices shall be filled with approved murrum. Excess murrum if any over the surfaces shall
be removed. Unless other wise specified, the murrum shall be supplied by the contractor at his own
cost from the selected area. The surfaces shall then be watered and consolidated with mechanical or
sufficiently heavy wooden tampers and log-rammers as approved by the Engineer. After compaction,
the Engineer-in-charge to give the required slope or level and dense sub-base and the surface shall
present clean look. Adequate care shall be taken by the contractor while laying and compacting the
rubble soling to see that concrete surfaces in contact with soling are not damaged.
Mode of Measurement:
The quoted rate shall be per square metre of the soling of specified thickness. The linear
dimension shall be measured up to two places of decimals of a metre and are worked out correct to the
two places of decimals of a square metre. Plan areas of soling work actually done limiting to the
dimensions as per drawings shall be measured for payment. The rate shall include all the materials

labour, transport etc. and no extra payment shall be made for work done at different levels. The rate
shall also include the cost of preparation of surface, all materials and labour, watering, consolidation
etc. all complete

UNIT-IV
4.1 REINFORCED CONCRETE AND ALLIED WORKS:
Scope:
This specification covers the general requirements for concrete jobs, using on-site production
facilities including requirements in regard to the quantity, handling, storage of ingredients,
proportioning, batching, mixing and testing of concrete and also requirements in regard to the
quality. This also covers the transportation of concrete from the mixer to the place of final deposit
and the placing, consolidation, curing, protecting, repairing ad finishing of concrete. After award of
the work, if so desired by the contractor, he / they may be allowed by the Engineer-in-charge till the
designed mix is obtained, to carry out the reinforce concrete work In foundation and plinth as per
equivalent nominal mix against the specified design mix concrete as per IS Codes. However, all other
specification for design mix shall govern for nominal mix also and nothing extra shall be paid for use
of extra cement on this account whether the cement is supplied by the Department or procured by the
contractor.
Cement Concrete (Plain and Reinforced):
The quality of materials and method and control of manufacture and transportation of all
concrete work in respect of mix, where reinforced or otherwise, shall conform to the applicable
portions of these specifications. The Engineer-in-charge shall have the right to inspect the sources of
materials, the layout and operation of procurement and storage of materials, the concrete batching and
mixing equipments and the quality control system. Such an inspection shall be arranged by the
contractor and the Engineer-in-charge's approval shall be obtained prior to starting the concrete work.
Materials for Standard Concrete:
The ingredients to be used in the manufacture of standard concrete shall consist solely of a
standard type Portland cement, clean sand, natural coarse aggregate, clean water, ice and admixtures if
specially called for as per drawings or schedule of quantities.

Cement :
Unless otherwise specified or called for by the Engineer-in-charge, cement shall be ordinary
Portland cement in 50 kg bags. The use of bulk cement will be permitted only with the approval of the
Engineer-in-charge. Changing of brands or type of cement within the
same structure will not be permitted. Ordinary Portland cement (OPC) 43 grade manufactured as per
I.S. specifications of reputed brands like ACC / Ultratech / Zuari / Coramendel or any other brands as
approved by the Engineer-in-charge from time to time shall be procured and used on the work. Joint
account of cement consumed at site for every day for items of work carried shall be maintained by the
Contractor for verification to ensure effective control on quality of cement used in the work.
A certified report attesting to the conformity of the cement to IS specifications by the cement
manufactures chemist shall be furnished to the Engineer-in-charge, if demanded. Incase the cement is
required to be arranged by the Contractor, the Contractor will have to make his own arrangement for
the storage of adequate quantity of cement. Cement in bulk may be stored in bins or silos which will
provide complete protection from dampness, contamination and minimize caking and false set.
Cement bags shall be stored in a dry enclosed shed (storage under tarpaulins will not be permitted),
well away from the outer walls and insulated from the floor to avoid contact with moisture from
ground and so arranged as to provide ready access. Damaged or reclaimed or partly set cement will
not be permitted to be used and shall be removed from the site. The storage bins and storage
arrangements shall be such that there is no dead storage. Not more than 12 bags shall be stacked in
any tier. The storage arrangement shall be got approved by the Engineer-in-charge. Consignments in
cement shall be stored as received and shall be consumed in the order of their delivery. Contractor
shall establish cement/concrete/soil testing laboratories at site of work with qualified person to handle
the laboratory. Every consignment of cement procured shall accompany test certificate from the
company indicating lot No etc. Sample shall be
taken for each lot and sent to Standard Approved Material Testing Laboratory for physical and chemical
analysis. The cost of testing shall be borne by the Contractor.
Cement held in store for a period of 90 (ninety) days or longer shall be retested before use in
work. Should at any time the Engineer-in-charge have reasons to consider that any cement is
defective, then irrespective of its origin and / or manufacturers test certificate, such cement shall be

tested immediately at a National Test Laboratory / Departmental Laboratory or such approved
laboratory, and until the results of such tests are found satisfactory, it shall not be used in any work.
Aggregates:
"Aggregate" in general designates both fine and coarse inert materials used in the
manufacture of concrete.
"Fine Aggregate" is aggregate most of which passes through 4.75 mm I.S. sieve.
"Coarse Aggregate" is aggregate most of which is retained on 4.75 mm I.S. sieve. All
fine and coarse aggregates proposed for use in the work shall be subject to the
Engineer-in-charge's approval and after specific materials have been accepted, the source of supply of
such materials shall not be changed without prior approval of the Engineer-incharge. Aggregate shall,
except as noted above, consists of natural sand, crushed stone and gravel from a source known to
produce satisfactory aggregate for concrete and shall be chemically inert, strong, hard, curable against
weathering, of limited porosity and free from deleterious materials that may cause corrosion to the
reinforcement or may impair the strength and / or durability of concrete. The grading of aggregates
shall be such as to produce a dense concrete of and shall be based on the "mix design" and preliminary
test on concrete specified hereinafter.
Sampling and Testing:
Sampling of the aggregates for mix design and determination of suitability shall be taken
under the supervision of the Engineer-in-charge and delivered to the laboratory, well in advance of the
schedule placing of concrete. Record of tests which have been made on proposed aggregates and on
concrete made from this source of aggregates shall be furnished to the Engineer-in-charge in advance
of the work or use, in determining suitability of the proposed aggregate.
Storage of aggregates:
All coarse and fine aggregates shall be stacked separately in stock pile in the material
yard near the work site in bins properly constructed to avoid inter mixing of different aggregates.
Contamination with foreign materials and earth during storage and while heaping the materials shall
be avoided. The aggregate must be of specified quality not only at the time of receiving at site but
also at the time of loading into mixer. Rakers shall be used for lifting the coarse aggregate from bins
or stock piles. Coarse aggregate shall be piled in layers not exceeding 1.00 meters in height to prevent

conning or segregation. Each layer shall cover the entire area of the stock pile before succeeding
layers are started. Aggregates that have become segregated shall be rejected. Rejected materials after
remixing may be accepted, if subsequent tests demonstrate conformity with required gradation.
Specific Gravity:
Aggregates having a specific gravity below 2.6 (saturated surface dry basis) shall not be used
without special permission of the Engineer-in-charge.
Fine Aggregate:
Fine aggregate except as noted above, and for other than light weight concrete shall consist
of natural or crushed sand conforming to IS 383. The sand shall be clean, sharp, hard, strong and
durable and shall be free from dust, vegetable substances, adherent coating, clay, loam, alkali,
organic matter mica, salt or other deleterious substances which can be injurious to the setting
qualities / strength / durability of concrete.
Screening and Washing:
Sand shall be prepared for use by such screening or washing or both as necessary, to remove
all objectionable foreign matter while separating the sand grains to the required size fractions. Sand
with silt content more than 3 percent will not be permitted to be used unless same is washed and silt
content is brought within 3% by weight.
GRADATION: Unless otherwise directed or approved, the grading of sand shall be within the
limit indicated here under:-
Where the grading falls outside the limits of any particular grading zone of sieves, other than 600
micron (IS) sieve by not more than 5% it shall be regarded as falling within that grading zone. This
tolerance shall not be applied to percentage passing the 600 micron (IS)
sieve or to percentage passing any other sieve size on the coarser limit of grading zone I or the finer
limit of grading zone IV. Fine aggregates conforming to Grading zone IV shall not be used unless mix
designs and preliminary tests have shown its suitability for producing concrete of specified strength
and workability.

Fineness Modulus:
The sand shall have a fineness modulus of not less than 2.2 or more than 3.2 the fineness modulus
is determined by adding the cumulative. Percentages retained on the following IS sieve sizes (4.75 mm,
2.36 mm, 1.18mm, 600 micron, 300 micron and 150 micron) and dividing the sum by 100.
Coarse Aggregate:
Coarse aggregate for concrete except as noted above and for other than light weight concrete
shall conform to IS 383. This shall consist of natural or crushed stone and gravel, and shall be clean
and free from elongated, flaky or laminated pieces, adhering coatings, clay lumps, coal residue,
clinkers, sag, alkali, mica, organic matter or other deleterious matter. The coarse aggregate and fine
aggregate shall be tested from time to time as required by the Engineer-in-charge to ascertain its
suitability for use in construction and the charges for testing aggregate shall be born by the contractor
as specified herein after.
Screening and Washing:
Crushed rock shall be screened and / or washed for the removal of dirt or dust coating, if so
demanded by Engineer-in-charge.
Grading:
Coarse aggregates shall be either in single or graded in both the cases. The grading shall
be within the following limits:

Foreign Material Limitations:
The percentages of deleterious substances in the coarse aggregate delivered to the mixer shall not exceed
the following.
Water:
Water used for both mixing and curing shall be free from injurious amount of deleterious materials;
potable waters are generally satisfactory for mixing and curing concrete. In case of doubt, the
suitability of water for making concrete shall be ascertained by the compressive strength and initial
setting time test specified in IS 456. The sample of water taken for testing shall be typical of the water
proposed to be used for concreting, due account being paid to seasonal variation. The samples shall
not receive any treatment before testing other than that envisaged in the regular supply of water
proposed for use in concrete. The sample shall be stored in a clean container previously rinsed out
with similar water. Average 28 days compressive strength of at least three 150mm concrete cubes
prepared with water proposed to be used shall not be less than 90% of the average strength of three
similar concrete cubes prepared with distilled water. The initial setting time of test block made with
the appropriate test cement and the water proposed to be used shall not be less than 30 minutes and
shall not differ by more than (+) 30 minutes form the initial setting time of control test block prepared
with the appropriate test cement and distilled water. The test blocks shall be prepared and tested in
accordance it the requirements of IS 4031. Where water can be shown to contain an excess of acid,
alkali, sugar or salt, Engineer-in-charge may refuse to permit its use. As a guide, the following
concentrations represent the maximum permissible values.
Limits of acidity:
To neutralize 200ml sample of water, using phenolphthalein as an indicator, it should not
require more than 2ml of 0.1 normal NaOH. The details of test shall be as given in IS 3025.

Limits of alkalinity:
To neutralize 200ml sample of water, using methyl orange as an indicator, it should not
require more than 10ml of 0.1 normal HCL. The details of test shall be as given in IS 3025.
Design Mix Concrete:
All reinforced concrete in the works shall be "Design Mix Concrete" as defined in I.S.
456-2000. All "Design Mix Concrete" work to be carried out under these specifications
shall be in grades designated as per table below:
Grades of Concrete:
Mix Design:
This is to investigate the grading of aggregates, water cement ratio, workability and the
quantity of cement required to give works cubes of the characteristic strength specified. The
proportion of the mix shall be determined by weight. Adjustment of aggregate proportions due to
moisture present in the aggregate shall be made. Mix proportioning shall be carried out according
to the ACI standard designation ACI-613 or Design of concrete mixes –
Road research Note No. 4, Department of Scientific and Industrial Research U.K. or I.S.
10262-1982.
Selection of Water Cement Ratio:
Since different cements and aggregates of different maximum size, grading, surface texture,
shape and other characteristics may produce concretes of different compressive strength for the same
free water cement ratio, the relationship between strength and free water cement ratio should
preferably be established for the materials actually to be used. In the absence of such data, the
preliminary free water cement ration (by mass) corresponding to the target strength of 28 days may be
selected from the relationship shown in Fig. 1 of IS. 10262- page 7. Alternately, the preliminary free

water ratio (by mass) corresponding to the target average strength may be selected from the
relationship in Fig2-IS 10262-1982, Page 8 using the curve corresponding to the 28 days cement
strength to be used for the purpose. Other relevant items to be used with design of mix should strictly
conform to the relevant clauses and appendices of IS 10262 – 1982.
Mode of Measurement for concrete work:
General:
Concrete as actually done shall be measured for payment, subject to the following tolerances,
unless otherwise stated hereinafter. Any work done extra over the specified dimensions shall not be
measured for payment.
a. Linear dimensions shall be measured in full centimeters except for the thickness of slab which
shall be measured tot eh nearest half centimeter.
b. Areas shall be worked out to the nearest 0.01 sqm.
c. Cubic contents shall be worked out the nearest 0.001 cum.
d. The concrete shall be measured for its length, breadth and height/depth limiting dimensions to
those specified on drawings or as directed by the Engineer-incharge.
Note: The sizes of RCC members as assumed in to estimate are based on preliminarydrawings
and are likely to be changed. The contractor is not entitled to any extra claim due to such changes.
Deductions:
No deduction shall be made for the following:
a. Ends of dissimilar materials e.g. joists, beams, posts, girders, rafters, purlins, trusses,
corbels, steps etc. up to 500 sq.cm in cross section.
b. Opening up to 0.1 sqm. (1000 sq.cm).
c. Volume occupied by reinforcement.
d. Volume occupied by pipes, conduits, sheathing etc. not exceeding 25sq.cm. each in
cross sectional area. Nothing extra shall be paid for leaving ad finishing such
cavities and holes.

Column Footing:
R.C.C. in foundation and footings shall be measured for its length, breadth and depths
limiting dimensions to those specified in drawing or as ordered in writing by the Engineer-incharge.
In case of tapering portions of column footings, the quantities shall be calculated by Prismoidal
Formula.
Column:
Column shall be measured from top footings to the plinth level and from plinth level to the
structural slab level ad to the subsequent structural slab levels. Measurements for higher grade
concrete in column at its junction with lower grade concrete beams shall be restricted tot eh
column section supporting the beam in question.
Wall:
All walls shall be measured from top of the wall footing to the plinth level ad from plinth
level to the top of structural first floor and to subsequent floors.
Beam and Lintel:
Beam shall be measured from face to face of the columns, walls, cross beams including
haunches if any. The depth of the beams shall be measured from the top of the slab tot eh bottom of
the beam except in the case of inverted beam where it shall be measured from top of slab to top
beams. The beams and lintels with narrow width even though acting as facia in elevation in some
cases will be measured as beams and lintels only.
I) Slab:
The length and breadth of slab laid to correct thickness as shown in the detailed drawing
for as ordered by the Engineer-in-charge shall be measured between beams, walls ad columns.
II) Chajjas, Facias, Fins ad Mullions:
a. Chajjas shall be measured net from supporting faces upto the edges of chajjas without any
facia.
b. Facia shall be measured full excluding chajja thickness.
c. End fins shall be measured full.

d. Intermediate fins, mullions shall be measured between chajjs or
other supporting structural members.
e. Parapets shall be measured from top of slab / chajja.
III Staircase:
The concrete in all members of staircase like waist slabs, steps, cantilever steps, stringer
beams etc. shall be measured for their length, breadth ad depth, limiting dimensions to those specified
on drawings. No deductions shall be made for embedded plugs, pockets.
Rates:
The rate for PCC / RCC shall include the cost of all materials, labour, transport, tools ad
plants and all the operations mentioned hitherto, including or excluding the cost of form work and /
or reinforcement as mention din the schedule for quantities. The rates also shall include the cost of
testing material, mix design; cube test ad allied incidental expenses. The reinforcement steel used in
the works shall be measured and paid for separately under relevant item.
4.2.5 FORM WORK
General:
The form work shall consist of shores, bracings, sides of beams and columns, bottom of slabs
etc, including ties, anchors, hangers, inserts etc. complete which shall be properly designed and
planned for the work. The false work shall be so constructed that up and down vertical adjustment can
be made smoothly. Wedges may be used at the top or bottom of timber shores, but not at both ends, to
facilitate vertical adjustment and dismantling of form work.
Design of Form Work
The design and engineering of form work as well as its construction shall be the responsibility of
Contractor. The drawings and calculations for the design of the form work shall be submitted well in
advance to the Engineer-in-charge for approval before proceeding with work, at no extra cost to the
Department. Engineer-in-charge's approval shall not however, relieve Contractor of the full responsibility
for the design and construction for the form work. The design shall take into account all

the loads vertical as well as lateral that the forms will be carrying including live and vibration
loadings.
Tolerances:
Tolerances are specified permissible variation from lines, grade or dimensions given in
drawings. No tolerances specified for horizontal or vertical buildings lines or footings. Unless
otherwise specified, the following tolerances will be permitted.
Tolerances for R.C. Buildings:
I) Variation from the plumb:
a) In the line ad surfaces of columns, piers, walls and in buttresses: 5 mm per 2.5m, but not
more than 25 mm.
b) For exposed corner columns ad other conspicuous lines
In any bay or 5 m, maximum : (+) 5 mm In 10 m or more: (+) 10mm
ii)Variation from the level or from the grades indicated on the drawings.
a) In slab soffits, ceilings, beam soffits and in arises.
b) In 2.5m (+) 5mm
In any bay or 5m maximum (+)
8 mm In 10 or more (+) 15mm
c) For exposed lintels, sills, parapets, horizontal grooves and conspicuous lines
iii) Variation of the linear building lines from established position in plan and related position of
columns, walls and partitions. In any bay or 5m maximum (+) 10 mm In 10 or more (+)
20mm
iv) Variation in the sizes ad locations of sleeves, openings in walls and floors except in the case of and
for anchor bolts : (+) 5mm
v) Variation in cross sectional dimensions of columns and beams and in the thickness of slabs and
walls: (+) 10 mm/(-)5mm
vi) Footing :

a) Variation in dimensions in plan (+) 50mm/(-) 5mm.V- Page 55 of 197
b) Misplacement or eccentricity: 2% of footing within the direction of misplacement but not
more than 50mm.
c) Reduction in thickness (-) 5% of specified thickness subject to maximum of 50mm.
vii) Variation in steps:
a) In a flight of stairs Rise (+) 3.0
mm Tread (+) 5.0 mm
b) Consecutive steps Rise
( 1.5 mm Tread
(+)3.0 mm
4.2 STEEL REINFORCEMENT
Steel reinforcement bars, if supplied or arranged by contractor, shall be either plain round
mild steel bars grade as per IS 432 (part-I) or medium tensile steel bars as per IS 452 (part-I) or hot
rolled mild steel ad medium tensile steel deformed bars as per IS 1139 or cold twisted steel bars and
hot weld strength deformed bars as per IS 1786, as shown and specified on the drawings. Wire mesh
or fabric shall be in accordance with IS 1566. Substitution of reinforcement will not be permitted
except upon written approval from Engineer-in-charge.
Storage :
The reinforcement steel shall not be kept in direct contact with ground but stacked on top of
an arrangement of timber sleepers or the like. Reinforcement steel shall be with cement wash before
stacking to prevent scale and rust. Fabricated reinforcement shall be carefully stock to prevent
damage, distortion, corrosion ad deteriorations.
Quality :
All steel shall be grade I quality unless specifically permitted by the Engineer-incharge. No
rolled material will e accepted. If demanded by the Engineer-in-charge. Contractor shall submit the
manufacturers test certificate for steel. Random tests on steel supplied by contractor may be

performed by Department as per relevant Indian Standards. All costs incidental to such tests shall be
at contractors expense. Steel not conforming to specifications shall be rejected. All reinforcement
shall be clean, free from grease, oil, paint, dirt loose mill, scale dust, bituminous materials or any other
substances that will destroy or reduce the bond. All rods shall be thoroughly cleaned before being
fabricated. Pitted and defective rods shall not be used. All bars shall be rigidly held in position before
concreting. No welding of rods to obtain continuity shall be allowed unless approved by the Engineer-
incharge. If welding is approved, the work shall be carried as per 2751, according to best modern
practices ad as directed by the Engineer-in-charge in all cases of important connections, tests shall be
made to prove that the joints are of the full strength of bars welded. Special specifications, as specified
by the Engineer-in-charge, shall be adhered to in the welding of cold worked reinforcing bars and bars
other than mild steel.
Laps :
Laps ad splices for reinforcement shall be shown in the drawings. Splices, in adjacent bars
shall be staggered ad the locations of all splices, except those pecified on the drawing shall be
approved by the Engineer-in-charge. The bars shall not be lapped unless the length required exceeds
the maximum available length of bars at site.
Bending :
All bars shall be accurately bent according to the sizes ad shapes shown on the detailed
working drawings/ bar being schedules. They shall be bent gradually by machine or other approved
means. Reinforcing bars shall not be straightened and rebent in a manner that will injure the materials.
Bars containing cracks or splits shall be rejected. They shall be bent cold, except bars of over 25mm
in diameter which may be bent hot if specifically approved by the Engineer-incharge. Bars bent hot
shall not be heated beyond cherry red colour (not exceeding 645oC ) and after bending shall be
allowed to cool slowly without quenching. Bars incorrectly bent shall be used only of ht means used
for straightening and rebinding be such as shall not, in the opinion of the Engineer-in-charge injure the
material. NO reinforcement bar shall be bent when in position in the work without approval, whether
or not it is partially embedded in ardened concrete. Bars having links or bends other than those
required by design shall not be used.

Bending at Construction Joints :
Where reinforcement bars are bent aide at construction joints and afterwards bent back into
their original position, care should be taken to ensure that no time the radius of the bend is less than 4
bar diameters for plain mild steel or 6 bar diameters for deformed bars. Care shall also be taken when
bending back bars to ensure that the concrete around the bar is not damaged.
Fixing / Placing ad Tolerance on Placing :
Reinforcement shall be accurately fixed by ay approved means maintain din the correct
position as shown in the drawings by the use of blocks, spacer and chairs as per IS 2502 to prevent
displacement during placing ad compaction of concrete. Bar intended to be in contact at crossing
point shall be securely bound together at all such points with number
16 gauge annealed soft iron wire. The vertical distances required between successive layers of bars in
beams or similar members shall be maintained by the provision of mild steel spacer bars at such
intervals that the main bars do not perceptibly sag between adjacent spacer bars.
Tolerance on placing of reinforcement :
Unless otherwise specified by the Engineer-in-charge, reinforcement shall be placed
within the following tolerances:
Tolerance in spacing
a) For effective depth, 200 mm or less + 10 mm
b) For effective depth, more than 200 mm + 15 mm
Cover to Reinforcement :
The cover shall in no case be reduced by more than one third of specified cover or 5mm
whichever is less. Unless indicated otherwise on the drawings, clear concrete cover for
reinforcement (exclusive of plaster or other decorative finish shall be as follows) :
a) At each end of reinforcing bar not less than 25 mm, nor less than twice the diameter of such bar.
b) For a longitudinal reinforcing bar not less than 25 mm, nor more than 40 mm, nor less than the
diameter of such bar. In the case of column of maximum dimensions of 200mm or under,
whose reinforcing bars do not exceed 12mm, a cover of 25mm may be used.

c) For longitudinal reinforcing bar in a bar, not less than 25 mm nor less than the diameter
of such bar and.
d) For tensile, compressive, shear, or other reinforcement in a slab, not less than 25mm,
nor less than the diameter of such bar and.
e) For any other reinforcement not less than 15mm, nor less than the diameter of such bar.
f) Increased cover thickness may be provided when surfaces of concrete members are exposed to the
action of harmful chemicals (as in the case of concrete in contact with earth faces contaminated with
such chemicals), acid, vapour, saline, railways) etc. and such increase of cover may be between 15mm
and 50 mm beyond the figures given in (a to e) above as may be specified by the Engineer -in-charge.
g) For reinforced concrete members, totally immersed in sea water the cover shall
be 40mm, more than specified ( a to e) above.
h) For reinforced concrete members, periodically immersed in sea water or subject to sea spray, the cover
of concrete shall be 50 mm more than that specified (a to e) above.
i) For concrete of grade M25 and above, the additional thickness of cover specified in (f),
(g) and (h) above a my be reduced to half. In all such cases the cover should not exceed 75mm.
j) Protection to reinforcement in case of concrete exposed to harmful surroundings may also be given
by providing a dense impermeable concrete with approved protective coating as specified on the
drawings. In such case, the extra cover, mentioned in (h) and (i) above, may be reduced by the
Engineer-in-charge, to those shown on the drawing.
k) The correct cover shall be maintained by cement mortar briquettes or other approved means.
Reinforcement for footings, grade beams ad slabs on sub grade shall be supported on precise
concrete blocks as approved by the Engineer-in-charge. The use of pebbles or stones shall be
permitted.
l) The minimum clear distance between reinforcing bars shall be in accordance with IS 456 or as
shown in drawings.

4.3 STRUCTURAL STEEL
Scope of Work :
The work covered by this specification consists of furnishing ad erecting of structural
steel complete in strict accordance with this specifications ad the applicable drawings.
Materials:
All structural steel shall be of standard sections as marked on the drawings ad shall be free of
scale, blisters, laminations, cracked edges ad defects of any sort. If the structural steel is not supplied
by the Department and the Contractor is required to bring such steel, the Contractor shall furnish
duplicate copies of all mill orders and / or also the test report received from the mills, to satisfy the
Engineer-in-charge. All structural steel and electrodes shall comply in all respects with relevant I.S.S.
for structural steel.
Workmanship:
All workmanship shall be of first class quality in every respect to get greatest accuracy to
ensure that all parts will fit together properly on erection. All ends shall be cut true to planes. They
must fit the abutting surfaces closely. All stiffeners shall fit tightly at both ends. All holes in plates
and section between 12mm and 20 mm thick shall be punched to such diameter that 3mm of metal is
left all around the hole to be cleaned out to correct size by reamer.
The base connection shall be provided as shown on drawings and the greatest accuracy of
workmanship shall be ensured to provide the best connections. Figured dimensions on the drawings
shall be taken.
Erection and Marking:
Erection ad fabrication shall be according to IS 800-1984 section –11. During erection, the
work shall be securely braced and fastened temporarily to provide safety for all erection stresses etc.
No permanent welding shall be done until proper alignment has been obtained. Any part which do not
fit accurately or which are not in accordance with the drawings and specifications shall be liable to
rejection and if rejected, shall be at once be made good. Engineer-in-charge shall have full liberty at
all reasonable times to enter the contractors premises for the purpose of inspecting the work and no

work shall be taken down, painted r dispatched until it has been inspected and passed. The contractor
shall supply free of charge all labour ad tools required for testing of work.
Delivery at Site :
The contractor shall deliver the component parts of the steel work in an undamaged state at
the site of the works and the Engineer-in-charge shall be entitled to refuse acceptance of any
portion which has been bent or otherwise damaged before actual delivery on work.
Shop Drawing :
The shop drawings of structural steel based on contract drawings
Engineer-in-charge. The necessary information for fabrication, erection,
must be furnished immediately after acceptance of the leader.
hall be submitted to the
painting of structure etc.
Painting :
Painting should be strictly according to IS. 1477-1971 (Part-I-Pretreatment) and IS 1477-1971
(part-II painting). Painting should be carried out on dry surfaces free from dust, scale etc. The paint
shall be approved by the Engineer-in-charge. Once coat of shop paint (red lead) shall be applied on
steel, except where it is to be encased in concrete or where surfaces are to be field welded.
Welding :
Welding shall be in accordance with IS. 816-1969,IS819-1957, IS 1024-1979, IS1261-1959,
IS 1323-1982 and IS 9595-1980 as appropriate. For welding of any particular type of joint, welders
shall give evidence of having satisfactory completed appropriate test as described in ay of IS 817-
1966, IS 1393-1961, IS 7307 (part-I) –1974, IS 7310 (part-I) 1974 and IS 7318 (part-I) 1974 as
relevant.
Welding Consumables:
Covered electrodes shall conform to IS 814 (part-I) – 1974 and IS814 (part-II)- 1974 or IS
1395-1982 as appropriate. Filler rods and wires for gas welding shall conform to IS 1278-1972. The
bar wire electrodes for submerged are welding shall conform t IS 7280-
1974. The combination of are and flash shall satisfy the requirements of IS 3613-1974.

The filler rods ad bare electrodes for gas shielded metal, are welding shall conform to IS
6419-1971 and IS 6560-1972 as appropriate .
Type of Welding :
Are welding (direct or alternating current) or Oxyacetylene welding may used. Field welding may be
used. Field welding shall be by D.C.
4.4 DAMP PROOF COURSE
Scope of work:
The work covered under this specifications consists supplying and laying plain
cement concrete or cement plaster 1:3 as damp proof course with or without waterproofing
admixture with this specification and applicable drawings.
Workmanship :
Surface to receive damp proof course shall be cleaned and carefully wiped to remove all dust,
laitance etc. and shall be approved by the Engineer-in-charge Damp proof course shown shall be
cement concrete as per proportion indicated in the schedule or cement
plaster in the ratio CM 1:3. Approved water proofing compound @ 2% by weight of cement or as
directed by the manufacturer shall be mixed in cement mortar for this concrete or plaster. The damp
proof course shall be laid to the full width of the walls and the edges shall be straight, even and truly
vertical. Wooden forms shall be used to obtain good edges. No masonry work shall be commenced on
freshly laid damp proof course unless it is cured for 48hours of its laying by curing of damp proof
course shall be continued along with the masonry work. Specification for cement, sand, aggregate and
water shall be as described herein before for concrete works / cement plaster.
Mode of measurement :
The work shall be measured in sqm. area actually laid limited to sites as shown in drawing. The
rate shall include cost of all the materials, labour etc. and scaffolding (if any).
4.5 BRICK WORK
Scope of work:

The work covered under this specification pertains to procurement of best quality locally
available bricks and workmanship of building walls of various thickness. In strict compliance with the
specifications and applicable drawings.
Materials :
Brick shall be best quality locally available bricks and shall be got approved by the Engineer
- in-charge before incorporation in the work. The nominal size of bricks (F.P.S) shall be 22.9 X 11.4
X7cm (9" X 4 1/2 X 2 3/4" ). Permissible tolerance on dimensions shall be + 3mm. in length and +
1.5 mm in width / thickness. The contractor shall get approved the sample and source of bricks from
Engineerin- charge before procurement on large scale and shall maintain the same for the entire
work. In case the size of bricks used in the work found lesser than the specified one for the whole lot
: Extra cement consumed due to more number of joints and due to additional thickness of plaster than
the specified in the tender to match with adjoining columns and beams, shall be to contractor's
account. If the plastering to be done is more than the specified thickness to bring the plaster surface to
perfect line, level ad plumb with adjoining columns, beams walls etc., the contractor shall be
responsible to provide and fix chicken wire mesh to receive more thickness of plaster at his own cost
and nothing extra will be paid on this account.
In case the size of bricks used in the work, found more than the permissible, the contractor shall chip
out the exposed edges of bricks upto the required level of wall to receive specified thickness of plaster
at no extra cost. Bricks shall generally conform to IS 1077-1970. In any case minimum crushing
strength shall not be less than 35 kg/sq.cm and water absorption shall not be more than 25% by
weight. The Engineer-in-charge shall have the right to reject bricks obtained from any field where the
soil have an appreciable quantity of sulphates and chlorides. The specifications for cement, sand and
water shall be same as described herein before under cement concrete. Bricks shall be thoroughly
soaked in water before using till the bubles ceases. No half or quarter brick shall be used except as
closer. The closers shall be cut to required size and used near the end of the walls. The walls shall be
raised truly to plumb.
The type of bond to be adopted shall be decided by the Engineer-in-charge, but vertical joints shall be laid
staggered.
Workmanship :
Four courses of brick work with four joints should not exceed by more than 40mm the same
bricks piled one over the other without mortar. Brick work shall not be raised more than 10 courses a
day unless otherwise approved by the Engineer-in-charge. The brick work shall be kept wet for at

least 7 days. Brick work shall be uniformly raised around and no part shall be raised more than 1.0
metre above another at any time.
All joints shall be thoroughly flushed with mortar of mix as specified in the schedule of
quantities, at every courses. Care shall be taken to see that the bricks are bedded effectively and all
joints completely filled to the full depth. The joints of brick work to be plastered shall be raked out
to a depth not less than 10mm as the work proceeds. The surface of brick work shall be cleaned
down and wiped properly before the mortar sets.
The adhesion between the brick masonry surface d the concrete surface of columns, beams,
chajjas, lintels etc. should be proper by ensuring that the concrete surface coming in contact with brick
masonry is backed / chipped / keyed, cleaned and cement slurry is applied so that a proper bond is
achieved between the two dissimilar materials. It is responsibility of the contractors to ensure that
there will not be any cracks / fissure anywhere in the brick masonry. In case the cracks appear
subsequently in those areas, they should be made good by cement grouting or epoxy putty grouting/
poly sulphide compound grouting or as per standard modern specifications/methods with the prior
approval of the Engineer-in-charge, at the cost of the contractor. All the courses shall be laid truly
horizontal and all vertical joints shall be truly vertical. Specified mortar of good and approved quality
shall be used. Lime shall not be used where reinforcement is provided in brick work. The mortar
should completely cover the bed and sides of the bricks. Proper care should be taken to obtain uniform
mortar joint thought out the construction. The walls should be raised uniformly in
proper, approved bond. In construction of the wall, first of all two end corners are carefully laid to line
and level ad then it between portion is built, with a cord stretching along the headers or stretchers held
in position at the ends. This helps in keeping the alignment of the courses and marinating them in
level. Similarly all other courses are built. Care shall be taken to keep the perpends properly aligned
within following maximum permissible tolerances :
Deviation from vertical within a storey shall not exceed 6mm per 3 m height Deviation in
verticality in total height of any wall for building more than one storey in height shall not exceed 12.5
mm. Deviation from position shown on plan of any brick work shall not exceed 12.5 mm. Relative
displacement between load bearing wall in adjacent storeys in the ended to be vertical alignment shall
not exceed 6mm. A set of tools comprising of wooden straight edge, masonry spirit level, square, 1
meter rule line and plumb shall be kept on the site of work for every 3 masons for proper check during
the progress of work. No brick work shall be carried on during frosty weather except with the written
permission of the Engineerin-charge who will give special directions as to the manner in which the

work is to be performed. All brick work laid during the day shall, in seasons liable to frost, be
properly covered up at night as directed by the Engineer-in-charge. Should any brick work be
damaged by frost, the brick work shall, at the discretion of the Engineer-incharge, be pulled down ad
made good at the cost of the contractor.
Concrete surfaces of columns, beams, lintels, chajjas etc. coming in contact with masonry
work shall be properly chipped, washed ad given a thick coat of cement slurry before start of work.
The rate quoted shall include wire brushing and cleaning brick work covered with fungus or
deleterious materials.
Brick work shall be well watered / cured throughout the day for atleast a week from the
date of building and the work shall be protected from sub and rain.
Materials ad workmanship for a half brick or brick on edge partition wall shall be a specified
above. The wall shall be stiffened by providing with 2 nos. 6mm diameter M.S. or as specified in the
schedule as bottom reinforcement (only the M.S. reinforcement will be paid separately under relevant
item).
The rates for brick work shall include the cost of the following :
Providing and fixing necessary single or double scaffolding and removing the same
after the work is completed. Watering, curing, lifting of material to any height.
Raking out of joints to receive plaster. Forming slab sittings, cutting or leaving holes for lugs of
windows, doors, sills, switch and plug boxes etc. Making good all holes, chases etc. to any depth due
to conduit pipes, holdfasts, bolts, switch and plug boxes etc.
Bedding and pointing precast lintels, sills etc. in or on walls. For the purpose of measurements, the
thickness of one brick wall ad over shall be taken in terms of multiples of half brick.
For Brick work measured in Cubic Metres :
The contract rate shall be for a unit of one cubic metre of brick masonry as actually done.
For measurement purpose, thickness of single brick wall shall be taken as 215 mm. irrespective of
thickness used. Brick walls of more than one brick thickness shall be measured as per actual
thickness constructed. All opening in brick work for doors, windows and ventilators shall be

deducted to get the net quantity of actual brick work done. Opening or chases required for P.H. or
electrical inserts less than 0.1 sqm. And bearing of precast concrete members shall not be deducted.
No extra payment shall be made for any extra work involved in making the above openings or
placements.
For Brick work measured in square metre :
Half brick thick masonry walls shall be measured in sqm. All openings in brick work for
doors and windows and windows ad ventilators shall be deducted to get the net quantity of actual
work done. Openings of chases required for P.H. or Electric inserts less than 0.1 sqm. And bearing of
precast concrete members shall not be deducted. No extra payment shall be made for extra work
involved in making the above openings or placements.
4.6 STONE MASONRY
Scope of work:
The work covered under this specifications consists of supplying and erecting stone
masonry walls with available best quality of stone in strict compliance with this specifications and
applicable drawings.
Random Rubble Masonry :
Material :
The rubble shall be of the best quality trap / granite / ballast stones obtained from the
approved quarry. The same of the stone, to be used shall be got approved from the Engineerincharge.
All stones shall , generally be freshly quarried and shall be sound, dense, hard, free from segregation,
cracks, weathered portions and other structural defects to requisite sections ad forms ad shall have
fully dressed beds and joints. Atleast 50% of the stones shall be 0.015 cum.
in content when reckoned individually. The length of stones for stone masonry shall not
exceed three times the height not the breadth or base shall not be greater than thee fourth the thickness
of wall, or not less than 15cm. thee height of stone may be upto 30 cm. stones shall be laid on the
natural beds and shall run sufficiently inside the wall thickness. No hollow space shall be left out and
inter spaces of stones being filled with mortar ad stone chips, driven hard ad not with mortar only.

All mortar to be used shall be of the type and proportion mentioned in the item. Cement, sand
and water to be sued shall conform to their relevant specifications as described under cement
concrete.The masonry shall be laid plumb, lines levels, curves, shapes as shown in drawings. All
required holes for passage o water or pipes are to be embedded during construction as specified. All
stones shall be wetted before laying in masonry. Concrete surfaces of columns, beams, lintels, chajjas
etc. coming in contact with masonry shall be properly chipped, washed and wetted before start of
masonry work. The concrete slurry as the masonry work progresses in height. Clean chips and spawls
carefully selected to fit in the space shall be wedded into the mortar. Joints and beds wherever
necessary to avoid thick beds or joints or mortar. However, proper shaping and dressing of stones
shall be done prior to their laying in masonry and hammering shall not be resorted to often after the
stones are laid in position. The bond stones shall be used in every square metre area of masonry wall
ad shall extend from front to back to thin walls having width of 600 mm. and shall overlap by at least
150 mm. in walls having thickness more than 600mm. when lid from both sides.
When the work has to be started on the old or the one competed a long while ago or in the
previous working seasons, care shall be taken to roughen and clean old surface satisfactorily without
disturbing the masonry before laying the new. It shall be wetted before laying the bedding mortar.
When practicable, the whole masonry in any structure shall be carried out upto a uniform level
throughout. But when breaks are unavoidable in carrying the work continuously in uniform level,
sufficiently long steps shall be left. All junction of walls shall be formed at the time when walls are
being built. Cross walls should be carefully bonded in to the main walls. All masonry built in cement
mortar shall be kept continuously wet for 14 days from the date of laying. Should the mortar perish
i.e., becomes dry, white or powder through neglect of watering if the masonry shows hollow joints or
non adherence of mortar to the stones or if the work does not conform to drawings and specifications,
the work shall be pulled down ad rebuilt by the contractor at his own cost and risk. All masonry shall
be thoroughly cleaned ad washed down on completion and all stains, adhering mortar removed from
the surface and raking of joints carried out as the scaffolding is being lowered and removed. Holes left
in masonry for supporting scaffolding shall be filled and made good before pointing / plastering.
All stone masonry shall be measured in cubic metres as actually done. All openings for
windows, doors, lintels etc. shall be deducted to get the net quantity of actual work done. Openings
or chases required for P.H. and electrical inserts less than 0.1 sqm. and bearings of precast concrete

members shall not be deducted. The ate shall also include cost of corner stones, bond
stone, scaffolding, labour, curing etc.
FLOORING
Scope of work:
The work covered under this specification consists of providing and laying at levels and
floors, flooring of different types, strictly in accordance with these specifications and relevant
drawings.
Cement Concrete Flooring (Indian Patent Stone) :
Materials :
The specifications for materials, grading, mixing and the quantity of water to be added shall
generally conform to their relevant specifications described under plain and reinforced concrete. The
maximum size of coarse aggregate shall be 10mm. The fine aggregate shall consist of properly graded
sand. Concrete shall be mixed preferably by machine, and hand mixing shall be avoided as far as
practicable.
Preparation of Base :
The base concrete surface shall be thoroughly chipped to remove laitance, caked mortar, loose
sand, dirt etc. cleaned with wire brush and washed clean and watered until no more water is absorbed.
Where the base concrete has hardened so much that roughening the surface by wire brushes is not
possible, the same shall be roughened by chipping or hacking at close intervals. The surface shall be
soaked with water for atleast 12 hours and surface water removed and dried before laying the topping.
Before laying the concrete, cement slurry at 2.75 kg/ sqm. of surface shall be applied before laying the
topping. Before laying the concrete, cement slurry at 2.75 kg. / sqm. of surface shall be applied for
better bond, / flush as per drawings. The edge of each panel into which the floor is divided shall be
supported by wooden or metal strips duly oiled to prevent sticking. The panels shall be of uniform
size and, unless otherwise specified, no dimension of panel shall exceed 2 m. and the area of a panel
shall not be more than 2 sqm. However, the exact size of panel shall be decided by the Engineer-in-
charge to suit the size of the room. The joints in the floor finish shall extend through the borders a
skirting/ dado. The border shall have mitred joints at the corners of the room. Where aluminium
dividing strips are proposed to be provided, the same shall be fixed in cement mortar 1:2 @ 1200 mm.
centers or as specified in the schedule for full depth of the finished floor. The depth of dividing strips

shall be the thickness as proposed for the finished floor in the item. In the case of flush joints,
alternate panels only may be cast on same day.
Atleast 48 hours shall elapse before the concreting of adjacent bay is commenced.
Mixing :
The topping concrete shall be of mix of one part of cement, two parts of sand and 4 parts of
well graded stone chips of 10mm maximum size. the ingredients shall be thoroughly mixed with just
sufficient water to the required plasticity, having water cement ratio not more than 0.4
Laying :
The free water on the surface of the base shall be removed and a coat of cement slurry to the
consistency of thick cream shall be brushed on the surface. On this fresh grouted base, the prepared
cement concrete shall be laid immediately after mixing. The concrete shall be spread and leveled
carefully. The concrete shall be compacted and brought to the specified levels by means of a heavy
straight edge resting on the side forms and down ahead with a sawing motion in combination with a
series of lifts and drops alternatively with small lateral shifts, either mechanically or manually as
directed by the Engineer-in-charge. While concreting the adjacent bays, care shall be taken to ensure
that the edges of the previously laid bays are not broken by carelessness or hand tamping.
Immediately after laying the concrete, the surface shall be inspected for high or low spots and
correction needed shall be made up by adding or removing the concrete and whole surface is again
leveled. When the layer is made even, the surface shall be completed by ramming or beating ad then
screed to a uniform line and level. Before the initial set commences, the surface shall be sprinkled
directly or empty gunny bags spread over the surface of the concrete to absorb excess water coming
on top due to floating.
Finishing the surface:
After the concrete has been fully compacted, it shall be finished by toweling or floating.
Finishing operations shall start shortly after the compaction of concrete an shall be spread over a
period of one to six hours depending upon the temperature ad atmospheric conditions. The surface
shall be trowelled intermittently at intervals for several times so as to produce a uniform and hard
surface. The satisfactory resistance of floor to wear depends largely upon the care with which
troweliing is carried out. The object of trowelling is to produce as hard and close knit a surfaces
possible. The time interval allowed between successive trowelling is very important. Immediately

after laying only just sufficient trowelling shall be done to give a level surface. Excessive trowelling
in the earlier stages shall be avoided as this tends to work a layer rich in cement to the surface, some
time. After the first trowelling, the duration depending upon the temperature, atmospheric conditions
d the rate of setting of cement used, the surface shall be retrowelled many times at intervals to close
any pores in the surface shall be retrowelled many times at intervals to close any pres in the surface,
and to bring to surface and scrap off any excess water in concrete or laitance (it shall not be trowelled
back into the topping). The final trowelling shall be done well before the concrete has become too
hard but at such a time that considerable pressure is required to make any impression on the surface.
Trowelling of rich mix of dry cement. and fine aggregate on to the surface shall not be permitted.
Trowel marks should not be seen on the finished surface. Where broom finish is specified, after the
concrete has been thoroughly compacted, and when most of the surface water has disappeared, the
surface shall be given broom finish with an approved type of brass or M.S. Fiber. The broom shall be
pulled gently over the surface from edge to edge in such a manner that corrugation shall be uniform in
width and depth, the depth shall be not more than 1.5 mm. Bromming shall be done when the concrete
is in such ac condition that the surface will not be torn or unduly roughened by the operation. Coarse
or long bristles which cause irregularities or deep corrugation shall be timed out. Brooms which are
worn or other wise unsatisfactory shall be discarded.
After the concrete in the bays has set, the joints of the panels should be filled with cement
cream and neatly floated smooth or jointed. Care should be taken that just the minimum quantity of
cream for joint is used a excess spilling over the already finished surface shall be removed when the
cream is still green. Incase of wide joints the same shall be filled with pigmented cement concrete
(1:2:4) using approved pigment ad the joint shall be finished in perfectly straight line.
Steel Trowel Finish:
Areas where marbles tiles are proposed to be used are required to have base concrete finished
smooth by steel trowel
Curing :
The completed flooring shall be protected from sun, wind and rain for the first two days and
movement of persons over the floor is prohibited during this period. The finished surface shall be
covered and cured continuously from the next day after finishing, at least for a period for 7 days.
Bunding with murrum for curing is prohibited as it will leave permanent stain on the finished floor.
Cure shall be done by spreading sand ad kept damp throughout the curing period of seven days
minimum. The surface shall be protected from any damage to its whatsoever. The surface shall then

be allowed to dry slowly. All corners, junctions of floor with plastered wall surface shall be rounded
off when required at no extra cost.
The rate for flooring and skirting shall be in square metre of the area covered. The length and
width of the flooring shall be measured not between the faces of skiting or dado or plastered faces of
walls which is the proudest. All openings in flooring exceeding 0.1 sqm. in areas where flooring is not
done shall be deducted and net areas only shall be measured a paid for. Flooring under dado, skirting
or plaster shall not be measured for payment. Nothing extra shall be paid for laying the floor at
different levels in the same room. The dimensions shall be measured upto places of decimals of a
metre and area worked out upto two places of decimal of a square meter.
4.8 CEMENT PLASTERING FOR WALLS AND CEILINGS & SAND FACE
PLASTERS
Scope of work:
The work covered under these specifications consists of supplying all material for rendering
all types of plaster / pointing finishes strictly in accordance with these specifications, applicable
drawings etc.
General :
Cement, sand and water required for the work shall conform to specifications laid down herein
before under section cement concrete (plain and reinforced), except that sand for finishing coat shall
generally conform to IS 1542-1960. the plastering works shall generally conform to IS 1661-1987(pt.III)
Code of practice for cement plaster finish on walls and ceilings). All general precautions as specified in
I.S. 1661-1987 (pt.III) clause 8, shall be taken and preparation of the background shall be done as laid
down in IS 1661 clause 12 and IS 2402- 2963 shall be generally followed for sand faced plaster work.
Scaffolding required for facility of working shall be provided by the contractor at his own cost. This may
be double or single according to the requirement and shall be approved by the Engineer-incharge stage
scaffolding shall be erected when ceiling plastering is done. The contractor shall be responsible for
accidents if any, take place. The contractor shall co-operate with the other agencies for fixing switch
boxes at specified locations so that the boxes are fixed properly in line with finished plaster surface. All

finishing in and around these boxes as also around the conduit boxes in ceiling shall be done by plastering
contractor without any extra cost to the Department. The decision of the Engineer-incharge in this regard
shall be final and binding on the contractor.
Preparation of Surface :
The surface to be plastered shall first be thoroughly cleaned of all muck and cleaned down.
All joints shall be racked to in case of brick work / stone masonry and closely hacked in case of
concrete as the work proceeds. The surface to be plastered shall be well wetted for a minimum period
of 6 hours before commencing to work. The mortar for all plaster work shall be cement mortar of mix
as specified in the schedule of quantities. After erection of scaffolding and before commencement of
plastering work, top most junctions / joints / sides with beam / column shall be thoroughly packed
with cement mortar to prevent cracks. Before commencement of plastering operation, the contractor
shall ensure that all the service pipes, electrical conduits, boxes, switch boxes etc. have been installed
in position by other agencies and the plastering surface is duly approved by the Engineer-in-charge. In
order to enable other service contractors to fix the electrical conduit boxes, EDB's, pipes, outlets etc.
in proper level and line with reference tot eh finished surface of the plaster. Thiyyas and Tapanis i.e.
finished plaster patches shall be given by the main civil contractor on walls, ceiling at regular intervals
well in advance of his plaster work at no extra cost to the Department. The entire work of preparation
of surface before plastering shall thus be coordinated by the main civil contractor with all other
agencies working at site. Just before actual plastering work is taken up in hand, all the ceilings and
walls etc. shall be marked with plaster buttons indicating the thickness of plaster required and which
shall be in true line, level and plumb. The contractor shall get these marks approved by the Engineer -
incharge before starting the plastering work. The contractor shall also be responsible to render the
final surface true to line, level and plumb etc. All building operations like construction of walls,
concreting etc. shall have been completed before plastering is taken up. The plastering operation
should be taken up only after the service pipes etc. that are to embedded in the wall or ceiling are
completed and suitably protected against crossion by other agencies and okayed by the Engineer-in-
charge. Damage if caused to any of the existing fittings, fixtures, including doors and windows etc.
during the plastering operation shall be made good by the contractor at his own cost. If the surface
which is to be plastered either internally or externally is out of plumb and not in lien and level and if
the plastering to be done is more than specified thickness to bring the plastered surface to perfect lien
and levels in such specific cases, chicken wire mesh is to be provided by the on contractor at his own
cost and the plaster should be done to required lien an level with no extra cost whatsoever. The
finished plastered surface shall be free from cracks, fissures, crevices, hair cracks, blistering, local

swellings and flaking. The finished surface shall be true to line, level, plumb and plain and durable.
The adhesion of the mortar with the background surface is of prime importance as this affects
durability of plaster. Preparation of surface which has to take plastering work the surface should be
got approved by the Engineer-in-charge. In order to avoid the formation of deep and side cracks an for
dispersion for cracks at the junctions between concrete surfaces and brick masonry works, cautionary
measures such as fastening and lapping of chicken mesh over the junction areas should be carried out
over which the plastering work has to be taken up as required by the Engineer-in-charge. The minute
gap between window / door frames with cills and jambs should be filled up / caulked by plaster of
Paris / epoxy putty / silicon sealants, Rubber based sealants (brand name TECHMAT /TECHCOAT)
by caulking guns or by approved methods as instructed / approved by Engineer-in-charge.
Groves :
The grooves shall be of required dimensions. The same shall be made to turn wherever
necessary. The finish, inside, shall be of the same finish as that of the plaster. The lines of the grooves
shall be well defined and rounded. The grooves are to be provided in plastering in internal and
external surfaces shall be included in the rates wherever mentioned in the schedule of quantities.
Mix Proportion :
The mortar for plastering shall be of proportion as specified in the item schedule. The mixes
specified in the schedule are volumetric.
Mixing :
Cement and fine aggregates shall be mixed dry in the required proportions to obtain a uniform
colour. Water shall then be added tog et the required consistency for the plaster. Mixing shall be done
mechanically. However, manual mixing will be allowed only in exceptional circumstances at the
discretion of the Engineer-in-charge. Manual mixing, where adopted, shall be carried out on a clean
water tight platform. After water is added during mixing, the mix shall be held back and forth for 10
to 15 minutes. In machine mixing, the mixer shall run at least placing all the ingredients in the drum.
Only so much quantity of mortar which can be used within half an hour after the addition of water
shall be prepared at a time. Any mortar for plaster which is set or partially set shall be rejected and
shall be removed from the site.

10mm Plaster :
The plaster shall be laid with somewhat more than 10mm, thickness and pressed and leveled
with wooden ruler to a finished thickens of 10mm. Straight edges shall be freely used to ensure a
perfectly even surface. All exposed angles and junctions of walls, doors, windows, beams, slabs etc.
shall be carefully finished so as to furnish a neat and even surface.
15mm Plaster:
The proportions of sand and cement shall be as specified an shall cover all irregularities,
undulations, depressions due to chasing etc. in the surface o be plastered. The mortar shall be applied
slightly more than 15mm thick and pressed and leveled with wooden ruler or straight edge to finished
thickness of 15mm. Straight edges shall be freely used to ensure a perfectly even surface. The finished
surface shall be true and even and present uniform texture throughout and all joining marks shall be
eliminated. All corners, edges and angles shall be made perfectly to line, place and plumb. All
exposed angles and junction of walls, doors, windows, beams, slabs etc. shall be carefully finished so
as to furnish a neat and even surface. Plastering items amongst all other things as described in various
items also include:
1) Preparation of surface to receive the plaster, providing cement plaster of he specified average
thickness and proportions with specified number of coats.
2) All labour, materials, scaffolding, use of tools and equipment to complete the plastering work
as per specifications.
3) Curing for 10 days.
4) Cleaning the surface of doors, windows, floors or any other surfaces where plastering might
have splashed.
5) Finishing the portion of plaster left above the terrazzo, Plain cement tiles, ironite or any type
of skirting work to be finished rounded or as directed by the Engineer-in-charge, in a separate operation
after laying of floor tiles skirting.

Sand Faced Cement Plaster :
General :
Materials and preparation of surfaces and scaffolding etc. for sand faced plaster
wherever applicable shall conform to specification laid down herein before under section
cement plastering and the following specifications are also to be complied with.
The surface to be plastered shall first be thoroughly cleaned down. All joints shall have been
raked out in case of brick work/stone masonry as the work proceeds. Concrete surface shall also be
clearly hacked and wire brushed if not already done before plastering is taken up. The surface to be
plastered shall be well wetted for a minimum period of 6 hours before commencing the work. The
mortar for all plaster work shall be cement sand mortar of mix as specified in the schedule of
quantities. Double scaffoldings required for facility of construction shall be provided by the
construction at his own expenses wherever directed by the Engineer-in-charge, Scaffolding shall be
erected with pipes or bellies or bamboos of adequate strength so as to be safe for all the dead, live and
impact loads likely to sustain by it during construction operations. The contractor shall take all
measures to ensure the safety of the work and workmen. Any instruction of the Engineer -in-charge in
this respect shall also be complied with. The contractor shall be entirely responsible for any damage to
Government property or injury to persons, resulting from faulty scaffolding, defective ladders and
materials or otherwise arising out of his default in this respect. Proper scaffolding shall be provided to
allow easy approach for workmen and supervisory staff to every part of the work Ballies, Bamboos
etc. for scaffolding shall not be tied to the windows, doors, mullions, ventilators etc. Any damage
done to the windows, doors, etc. shall be made good by the contractor to the original conditions at his
own cost. For better safety, steel pipe scaffolding is preferred.
Workmanship :
The surface to be plastered shall first be dubbed out with cement mortar to cover all
irregularities and faces up to proudest part. The dubbing coat which shall be of proportion as
specified in schedule and a 12mm thick (1/2") layer shall then be applied/scored and keys shall be
formed on the surface by thoroughly combing it with heavy horizontal lines about 12mm (1/2") apart
and about 3mm (1/8") deep when mortar has just set. The cement mortar for sand faced plaster shall
have washed and approved sand with slightly larger proportions of coarse materials, but not
exceeding 3mm. The proportion of cement to sand shall be as specified in the schedule. The water is
gradually added to make the mixture homogenous. The thickness of finishing coat excluding key

shall be 8mm (about 5/16"). After application the surface should be finished with a wooden float
lined with a wooden float lined with cork closely pricked on with a wet sponge tapped gently to
bring sand particles into prominence.
The chajjas and any other horizontal portions shall be cleaned and set mortar that might have
been fallen at the time of plastering at higher elevation, before plastering the same is taken up. Vatas
shall be done simultaneously with chajja plaster.
Mode of Measurement :
Area of plastering will be measured net and shall be paid for. The measurement of length of wall
plastering shall be taken between walls or partitions (dimensions before plastering shall be taken) for the
length and from top of the floor or skirting or dado as the case may be to the under side of ceiling for the
height. All openings more than 0.1 sqm. shall be deducted and all jambs, so fits, sills of these openings if
done, will be measured to arrive to the net area for payment. No opening less than
0.1 sqm. shall be deducted and no jambs etc. for such openings shall be measured for payment. The
rate hall include the cot of finished all the edges, corners, cost of all materials, labour, scaffolding,
transport, curing etc. The rate shall include the cost of finishing all the edges, corners, cost of all
materials, labour, transport, scaffolding, curing etc. and grooves if so specified in the item of
schedule of quantities. The rate for plastering should include the cost of work towards the following
items for co-ordination with electrical item:
*Neatly plastering around DB's junction boxes, M.S. boxes etc. should be done and made matching
with the wall finish after installation of electrical equipment.
*All BD's service boxes, covers etc. should be covered by a plastic cloth of other suitable
covering material such that water or materials should not splash the same during brick
work and plastering work. This is to be done in such a way that electrical equipment as well as
painted surfaces are not spoiled.
*For fixing M.S. boxes, DB's etc. Thiya should be given such that the required face of the M.S.
box, DB covers etc. in line with final finished plastered surface.
*The rate for the item shall also include rounding up of corner and angles making sharp corners and
angles finishing around ceiling rose and electrical fittings etc. fixed by other agencies, finishing of top of
dado and skirting (zad finishing), junctions of roof and wall or beam with the finish as specified in the
item. Plastering of brick and concrete cornice and copings and plastering in restricted areas if any shall
not be measured separately. Architectural bands and narrow widths of plaster over

structural as well as non-structural and the line when prepare dint eh same thickness of plaster shall
not be measured separately and shall be covered by respective plaster items.
4.9 PAINTING
Scope of work:
The work covered under these specifications consist of furnishing the various types of paints and also
the workmanship for these items, in strict compliance with these specifications, which are given in
detail hereinafter with the item of schedule of quantities.
Materials:
Paints, oils varnishes etc. of approved brand and manufacture shall be used. Ready mixed
paints as recovered from the manufacturer without any admixture shall be used. If for any reason,
thinning is necessary in case of ready mixed paint, the brand of thinner recommended by the
manufacturer or as instructed by the Engineer-in-charge shall be used. Approved paints, oils or
varnishes shall be brought to the site of work by the contractor in their original containers in sealed
condition. The materials shall be brought in at a time in adequate quantities to suffice for the whole
work or atleast a fortnights work. The materials shall be kept in the joint custody of the contractor and
the Engineer-in-charge. The empties shall not be removed from the site for work, till the relevant item
of work has been completed and permission obtained from the Engineer-in-charge. The contractor
shall associate the chemist of paint manufacturers before commencement of work, during and after the
completion of work who shall certify the suitability of the surface to receive painting and the paint
before use etc.
Commencing Work :
Scaffolding :
Wherever scaffolding is necessary, it shall be erected on double supports ties together by
horizontal pieces, over which scaffolding planks shall be fixed. No bellies, bamboos or planks shall
rest on or touch the surface which is being painted. Were ladders are used, pieces of old gunny bags
shall be ties on their tops to avoid damage or scratches to walls. For painting of the ceiling, proper
stage scaffolding shall be erected. Painting shall not be started until and unless the Engineer-in-charge
has inspected the items of work to be painted, satisfied himself about their proper quality and given

his approval to commence the painting work. Painting, except the priming coat, shall generally be
taken in hand after all other builders work, practically finished. The rooms should be thoroughly
swept out entire building cleaned up atleast one day in advance of the paint work being started.
The surface shall be thoroughly cleaned. All dirt, rust, scales, smoke and grease shall be
thoroughly removed before painting is started. Minor patches if any in plastered / form finished
surfaces shall be repaired and finished in line and level in C.M/ 1:1 and cracks and crevices shall be
filled with approved filler, by the contractor at no extra cost to the Department. The prepared surface
shall have received the approval of the Engineer-in-charge after inspection, before painting is
commenced.
Application :
Before pouring into smaller containers for use, the paint shall be stirred thoroughly in its
containers. When applying also, the paint shall be continuously stirred in the smaller containers so that
consistency is kept uniform. The external surfaces of the buildings under reference including he
R.C.C. Jalli, fins and the panels above and the panels above and below the window etc. shall be
finished in different colours of approved shade. The contractor will make suitable samples at site for
Departments approval before taking up the work in hand and they will be allowed to proceed with the
work only after getting Departments approval for the same. The painting shall be laid on evenly and
smoothly by means of crossing and laying off, the later in the direction of the grain in case of wood.
The crossing and laying off consists of covering the area with paint, brushing the surface hard for the
first time and then brushing alternately in opposite directions two or three time and then finally
brushing lightly in direction at right angles to the same. In this process, no brush marks shall be left
after the laying off is finished. The full process of crossing and laying will constitute one coat. Where
so stipulated, the painting shall be done with spraying. Spray machine used may be
(a) a high pressure (small air aperture) type or
(b) a low pressure (large air gap) type,
depending on the nature and location of work to be carried out. Skilled and experienced workmen shall
be employed for this class of work. Paints used shall be brought to the requisite consistency by adding a
suitable thinner. Spraying should be done only when dry condition prevails. Each coat shall

be allowed to dry cut thoroughly and rubbed smooth before the next coat is applied. This should
be facilitated by thorough ventilation.
Each coat except he last coat, shall be tightly rubbed down with sand paper or fine pumice
stone and cleaned of dust before the next coat is laid. No left over paint shall be put back into the
stock tins. When not in use, containers shall be kept properly closed. The final painted surface shall
present a uniform appearance and no streaks, blisters, hair marks from the brush or clogging of paint
puddles in the corners of panels, angles of moldings etc. shall be left on the work. In case of cement
based paints / primers, the absorbent surfaces shall be evenly damped so as to give even suction. In
any weather, freshly painted surfaces shall be kept damp for atleast two days. In painting doors and
windows, the putty around the glass panes must also be painted, but care must be taken to see that no
paint stains etc. are left on the glass. Tops of shutters and surfaces in similar hidden locations shall
not be left out while painting. Prospect covers of electrical switch boxes have to be painted from
inside by removing them. Care shall be taken while removing them in position after painting with
respective approved paints. In painting steel work, special care shall be taken while painting over
bolts, nuts, rivets, overlaps etc. The additional specifications for primer and other coats of paints
shall be as in accordance to the detailed specifications under the respective headings. Any damage
caused during painting work to the existing works / surfaces shall be made good by the contractor at
his own cost.
Brushes and Containers :
After work, the brushes shall be completely cleaned off paint and linseed oil by rinsing with
turpentine. A brush in which paint has dried up is ruined and shall be kept at a place free from dust.
When the paint has been used, the containers shall be washed with turpentine and wiped dry with soft
clean cloth, so that they are clean and can be used again.
Measurement :
Painting, unless otherwise stated shall be measured by area in square metre. Length
and breadth shall be measured correct upto two places of decimal of a meter. No deduction shall be
made for opening not exceeding 0.05 sqm. and no addition shall be made for painting to the beading,
moulding edges, jambs, soffits, sils, architraves etc. of such openings. In measuring painting,
varnishing, oiling etc. of joinery and steel work etc. the coefficient as in the following table shall be
used to obtain the areas payable. The co-efficient shall b applied to the areas measured flat and not

girthed in all cases. In case of painting of door shutter with push plates in plastic laminate, deduction
will be made for area of such laminations.
Precautions :
All furniture, lightings, fixture, sanitary, fittings, glazing, floors etc. shall be protected by
covering and stains, smears, splashing, if any shall be removed and any damage done shall be made
good by the contractor at his cost.
Rates :
Rates shall include cost of all labour and materials involved on all the operations described above
and in the particular specifications given under the several items.
Painting, Priming coat on Wood, Iron of Plastered Surfaces
Primer
The primer for wood work, iron work or plastered surface shall be as specified in the
description of the item. Primer for wood work / Iron & Steel / Plastered / Aluminium surfaces shall be
as specified below:
Surfaces Primer to be used
a) Wood work (hard and soft wood) Pink conforming to IS 3536 – 1966
b) Resinous wood and ply wood Aluminium Primer
c) Iron & Steel, aluminium and galvanized steel Work : Zinc chromate primer
conforming to IS 104-1962
d) d) Plastered surfaces, cement brick work, Asbestos surfaces for oil bound distemper
and paint Cement primer The primer shall be ready mixed primer of approved band
and manufacture.
The wood work to be painted shall be dry and free from moisture. The surface shall be thoroughly
cleaned. All unevenness shall be rubbed down smooth with sand paper and shall be well dusted.
Knots, if any, shall be covered with preparation of red lead

made by grinding red lead in water and mixing with strong glue sized and used hot.
Appropriate filler material with same shade as paint shall be used where so desired by the
Engineer-in-charge. The surface treated for knotting shall be dry before painting is applied.
After the priming coat is applied, the holes and indentation on the surface shall be stopped
with glaziers putty or wood putty (for specifications for glaziers putty and wood putty – refer
as mentioned herein before). Stopping shall not be done before the priming coat is applied as
the wood will absorb the oil in the stopping and the latter is therefore liable to crack.
Iron and Steel Work :
All rust and scales shall be removed by scrapping or by brushing with steel wire brushes. Hard
skin of oxide formed on the surface of wrought iron during rolling which becomes loose by
rusting, shall be removed. All dust and dirt shall be thoroughly wiped away from the surface. If
the surface is wet, it shall be dried before o)priming coat is undertaken.
Plastered Surface :
The surface shall ordinarily not be painted until it has dried completely. Trial patches of primer
shall be laid at intervals and where drying is satisfactory, painting shall be taken in had. Before
primer is applied, holes and undulations, shall be filled up with plaster of Paris / putty and rubbed
smooth.
erintendent Engineer for his circle every year and approved by the Board of Chief Engineers.
These rates are incorporated in the standard schedule of rates.
Lead statement:
The distance between the source of availability of material and construction site is known as
"Lead " and is expected in Km. The cost of convenayce of material depends on lead. This statement
will give the total cost of materials per unit item. It includes first cost, convenayce loading,
unloading stacking, charges etc. The rate shown in the lead statement are for mettalled road and
include loading and staking charges. The environment lead on the metalled roads are arrived by
multiplying by a factor
a) for metal tracks - lead x 1.0
b) For cartze tracks - Lead x 1.1
c) For Sandy tracks - lead x 1.4
Note: For 1m3 wet concrete = 1.52m3 dry concrete approximately
SP.Wt of concrete= 1440 kg/m3 (or) 1.44 t/m3
1 bag of cement = 50 Kg

UNIT-V
VALUATION
OBJECTS OF VALUATION
DEFINITIONS
Market Value
Book Value
Capital cost
Sinking Fund Method
Direct comparison with the capital Value
Depreciation Method of Valuation
Methods for calculating depreciation
FIXATION OF RENT
CALCULAITON OF STANDARD REND OF A GOVT. PROPERTY
TECHNICAL TERMS
1. EXPENDITURE
The whole amount can be spent during the financial year or not.
2. CAPITAL COST
Total cost including all the expenditure incurred from beginning to the
completion of a work.
3. PROVISIONAL SUM
Estimate of bill quantities for some special work to be done by a specialist
firm whose details are known at the time of preparation of estimate.
4. RATE OF COST
The cost per unit of subhead which is arrived at by dividing the up-todate
final charges on a sub-head by its up-to-date progress.

5. PREMIUM
The tendered percentage rate above the notified rates.
6. REBATE
The tendered percentage rate below the notified rates.
7. PLINTH AREA
It is a covered area of a building measured at floor level. It is measured by
taking external dimensions excluding plinth offset if any.
8. RATES
Rates followed are of sanctioned schedule of rates or nonscheduled, this fact is to
be mentioned under this sub – head.
9. CONTINGENCIES
Incidental expenses of miscellaneous character which cannot be classified
approximately under any distinct sub-head, but is added in the cost of
construction necessarily.
10. VALUATION
Valuation is the technique of estimating or determining the fair price or value of a
property such as building, a factory, other engineering structure of various types,
land…etc.
12. SALVAGE VALUE
It is the value of end of utility period without being dismantled.
SINKING FUND
The fund is gradually accumulated by way of periodic on annual deposit for the
replacement of the building or structure at the end of its useful life.
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DEPRECIATION
Depreciation is the gradual exhaustion of a usefulness of a property. Decrease or
loss in the value of a property due to its structural deterioration use, life wear and
tear, decay and obsolescence.
SCRAP VALUE
Scrap value is the value of dismantled materials. For a building when the life is over
the end of utility period of dismantled materials as steel, bricks, timber. Etc. will
fetch certain amount which is scrap value of a building.
5.1 OBJECTS OF VALUATION
It is the technique of estimating and determining the fair price or value of a property such as a
building, a factory or other engineering structures of various types, land etc.
5.1.1 Six important Purposes of Valuation:
The main purposes of valuation are as follows:
Buying or Selling Property
When it is required to buy or sell a property, its valuation is required.
Taxation
To assess the tax of a property, its valuation is required. Taxes may be municipal tax, wealth
tax, Property tax etc, and all the taxes are fixed on the valuation of the property.
Rent Function
In order to determine the rent of a property, valuation is required. Rent is usually fixed on the
certain percentage of the amount of valuation which is 6% to 10% of valuation.
Security of loans or Mortgage
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When loans are taken against the security of the property, its valuation is required.
Compulsory acquisition
Whenever a property is acquired by law; compensation is paid to the owner. To determine the
amount of compensation, valuation of the property is required.
Valuation of a property is also required for Insurance, Betterment charges, speculations etc.
Valuation of Building:
Valuation of a building depends on the type of the building, its structure and durability, on the
situation, size, shape, frontage, width of roadways, the quality of materials used in the construction
and present day prices of materials. Valuation also depends on the height of the building, height of the
plinth, thickness of the wall, nature of the floor, roof, doors, windows etc.
The valuation of a building is determined on working out its cost of construction at present
day rate and allowing a suitable depreciation.
Six Methods of Valuation
1. Rental Method of Valuation
2. Direct Comparisons of the capital value
3. Valuation based on the profit
4. Valuation based on the cost
5. Development method of Valuation
6. Depreciation method of Valuation
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5.2 DEFINITIONS
a) Market Value
The market value of a property is the amount which can be obtained at any particular time
from the open market if the property is put for sale. The market value will differ from time to time
according to demand and supply.
The market value also changes from time to time for various miscellaneous reasons such as
changes in industry, changes in fashions, means of transport, cost of materials and labour etc.
b) Book Value
Book value is the amount shown in the account book after allowing necessary depreciations.
The book value of a property at a particular year is the original cost minus the amount of depreciation
allowed per year and will be gradually reduced year to year and at the end of the utility period of the
property, the book value will be only scrap value.
c) Capital cost
Capital cost is the total cost of construction including land, or the original total amount
required to possess a property. It is the original cost and does not change while the value of the
property is the present cost which may be calculated by methods of Valuation.
Capitalized Value of a Property
The capitalized value of a property is the amount of money whose annual interest at the
highest prevailing rate of interest will be equal to the net income from the property. To determine the
capitalized value of a property, it is required to know the net income from the property and the highest
prevailing rate of interest.
Therefore, Capitalized Value = Net income x year’s purchase
Year’s Purchase
Year’s purchase is defined as the capital sum required to be invested in order to receive a
net receive a net annual income as an annuity of rupee one at a fixed rate of interest.
The capital sum should be 1×100/rate of interest.
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Thus to gain an annual income of Rs x at a fixed rate of interest, the capital sum should be
x(100/rate of interest).
But (100/rate of interest) is termed as Year’s Purchase.
The multiplier of the net annual income to determine the capital value is known as the
Year’s Purchase (YP) and it is useful to obtain the capitalized value of the property.
5.2.4 Sinking Fund Method
In this method, the depreciation of a property is assumed to be equal to the annual sinking
fund plus the interest on the fund for that year, which is supposed to be invested on interest bearing
investment. If A is the annual sinking fund and b, c, d, etc. represent interest on the sinking fund for
subsequent years and C = total original cost, then –
Rental Method of Valuation
In this method, the net income by way of rent is found out by deducting all outgoing from the
gross rent. A suitable rate of interest as prevailing in the market is assumed and
Year’s purchase is calculated. This net income multiplied by Year’s Purchase gives the capitalized
value or valuation of the property. This method is applicable only when the rent is known or probable
rent is determined by enquiries.
5.2.5 Direct comparison with the capital Value
This method may be adopted when the rental value is not available from the property
concerned, but there are evidences of sale price of properties as a whole. In such cases, the capitalized
value of the property is fixed by direct comparison with capitalized value of similar property in the
locality.
Valuation based on profit
This method of Valuation is suitable for buildings like hotels, cinemas, theatres etc for which
the capitalized value depends on the profit. In such cases, the net income is worked out after deducting
gross income; all possible working expense, outgoings, interest on the capital invested etc. The net
89

profit is multiplied by Year’s Purchase to get the capitalized value. In such cases, the valuation may
work out to be high in comparison with the cost of construction.
Valuation based on cost
In this method, the actual cost incurred in constructing the building or in possessing the
property is taken as basis to determine the value of property. In such cases, necessary depreciation
should be allowed and the points of obsolescence should also be considered.
Development Method of Valuation
This method of Valuation is used for the properties which are in the underdeveloped stage or
partly developed and partly underdeveloped stage. If a large place of land is required to be divided
into plots after providing for roads, parks etc, this method of valuation is to be adopted. In such cases,
the probable selling price of the divided plots, the area required for roads, parks etc and other
expenditures for development should be known.
If a building is required to be renovated by making additional changes, alterations or
improvements, the development method of Valuation may be used.
5.2.6 Depreciation Method of Valuation
According to this method of Valuation, the building should be divided into four parts:
1. Walls
2. Roofs
3. Floors
4. Doors and Windows
And the cost of each part should first be worked out on the present day rates by
detailed measurements.
The present value of land and water supply, electric and sanitary fittings etc should be added
to the valuation of the building to arrive at total valuation of the property.
90

Depreciation is the gradual exhaustion of the usefulness of a property. This may be defined as
the decrease or loss in the value of a property due to structural deterioration, life wear and tear, decay
and obsolescence.
5.2.6.1 Methods for calculating depreciation
1. Straight line Method
2. Constant percentage method
3. Sinking Fund Method
4. Quantity Survey Method
Straight Line Method
In this method, it is assumed that the property losses its value by the same amount every year.
A fixed amount of the original cost is deducted every year, so that at the end of the utility period, only
the scrap value is left.
Annual Depreciation, D = (original cost of the asset – Scrap Value)/life in years
For example, a vehicle that depreciates over 5 years, is purchased at a cost of
US$17,000, and will have a salvage value of US$2000, will depreciate at US$3,000 per year:
($17,000? $2,000)/ 5 years = $3,000 annual straight-line depreciation expense. In otherwords, it
is the depreciable cost of the asset divided by the number of years of its useful life.
Constant Percentage Method or Declining balance Method
In this method, it is assumed that the property will lose its value by a constant percentage of
its value at the beginning of every year.
Annual Depreciation, D = 1-(scrap value/original value)1/life in year
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Quantity Survey Method
In this method, the property is studied in detail and loss in value due to life, wear and tear,
decay, and obsolescence etc, worked out. Each and every step is based is based on some logical
grounds without any fixed percentage of the cost of the property. Only experimental valuer can work
out the amount of depreciation and present value of a property by this method.
5.3 FIXATION OF RENT
Capitalized value of the property can be known by any of the methods discussed earlier and suitable
value of year’s purchase is adopted according to the admissible rate of interest (8% or any other fair
rate).
Then, Net income = capitalized value / year’s purchase
All possible outgoings are added to this net income which will give gross income from the property.
Gross income or gross rent = Net rent + outgoings
The standard rent = (Gross Income / 12) per month.
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