Documents scaffolding

HEALTH AND SAFETY IN EMPLOYMENT ACT 1992
APPROVED CODE OF PRACTICE FOR THE
SAFE ERECTION AND
USE OF SCAFFOLDING
ISSUED AND APPROVED
D E PA RT M E N T O F
L A B O U R
OCCUPATIONAL SAFETY T E T A R I M A H I
& H E A LT H S E R V I C E
BY THE MINISTER
OF LABOUR
SEPTEMBER 1995

Published by the Occupational Safety and Health Service,
Department of Labour, Wellington, New Zealand.
First edition 1963
Revised 1970
Reprinted 1972
Revised 1976
Reprinted 1980
Revised 1985
Revised 1988
Revised 1989
Reprinted 1991
Revised 1995 and published as an approved code of practice
ISBN 0-477-03550-5
$10 (Incl. GST)

CONTENTS
NOTICE OF ISSUE .............................................. 6
FOREWORD........................................................ 7
PREFACE ........................................................... 8
A SUMMARY OF THE
HEALTH AND SAFETY IN EMPLOYMENT ACT 1992 9
REGULATIONS 9
APPROVED CODES OF PRACTICE 9
EMPLOYERS’ DUTIES 9
HAZARD MANAGEMENT 10
INFORMATION FOR EMPLOYEES 11
EMPLOYERS TO INVOLVE EMPLOYEES IN THE DEVELOPMENT OF
HEALTH AND SAFETY PROCEDURES 11
TRAINING OF EMPLOYEES 11
SAFETY OF PEOPLE WHO ARE NOT EMPLOYEES 11
EMPLOYEES’ AND SELF-EMPLOYED PERSONS’ DUTIES 11
ACCIDENTS AND SERIOUS HARM (RECORDS AND NOTIFICATION) 12
DEFINITIONS ................................................... 13
1. REQUIREMENTS .......................................... 17
1.1 INTRODUCTION 17
1.2 DEFINITIONS OF SCAFFOLDING AND SCAFFOLDING PROCESS 17
1.3 THE BUILDING ACT 18
1.4 MATERIALS 18
1.5 SCAFFOLD PLANKS 19
1.6 ERECTION, ALTERATION AND DISMANTLING 19
1.7 SUPERVISION 19
1.8 CERTIFICATES OF COMPETENCY 19
1.9 DUTIES OF PRINCIPALS, CONTRACTORS, SCAFFOLDING
ERECTORS AND USERS OF SCAFFOLDS 20
1.10 PROTECTION AND MAINTENANCE 22
1.11 ACCESS TO WORKING PLATFORMS 22
1.12 SCAFFOLDING NEAR ELECTRIC POWER LINES 23
1.13 SCAFFOLDING OVER VERANDAHS, GANTRIES OR ROOFS 24
1.14 LIFTING APPLIANCES MOUNTED ON SCAFFOLDING 24

2. DESIGN REQUIREMENTS ............................ 26
2.1 PRINCIPLES OF DESIGN 26
2.2 BASIS OF DESIGN 26
2.3 LOAD COMBINATIONS 26
2.4 DESIGN LOADS 27
2.5 SUPPORTING STRUCTURE 28
3. STANDING SCAFFOLDS .............................. 29
3.1 SCOPE 29
3.2 FOUNDATIONS 29
3.3 WORKING PLATFORMS 30
3.4 PLATFORM DECKING 31
3.5 GUARDRAILS AND MIDRAILS 32
3.7 SCREENS 33
3.6 TOEBOARDS 33
3.8 HEADROOM AND LIFTS 35
3.9 HEIGHT OF SCAFFOLDING 36
3.10 TIES 36
3.11 BRACING 37
4. TIMBER SCAFFOLDING................................ 40
4.1 SCOPE 40
4.2 QUALITY OF TIMBER AND FITTINGS 40
4.3 SPECIFIC REQUIREMENTS 40
5. TUBE SCAFFOLDING IN STEEL OR
ALUMINIUM...................................................... 42
5.1 SCOPE 42
5.2 GENERAL REQUIREMENTS 42
5.3 MATERIALS 43
5.4 SPECIFIC REQUIREMENTS FOR STANDING SCAFFOLDS 43
6. SCAFFOLDING WITH PROPRIETARY
EQUIPMENT ..................................................... 46
6.1 SCOPE 46
6.3 FRAME SCAFFOLDING 47
6.4 UNIT-ASSEMBLED SCAFFOLDING 47
6.5 BRACKETS 47
7. FREE-STANDING SCAFFOLDS ..................... 50
7.1 FREE-STANDING SCAFFOLDS 50
7.2 MOBILE SCAFFOLDS 51
7.3 TRESTLES AND TRIPODS 53

8. SUSPENDED SCAFFOLDS............................ 54
8.1 SCOPE 54
8.2 TYPES OF SUSPENDED SCAFFOLDS 54
8.4 SPECIFIC REQUIREMENTS 59
8.5 ENGINEER’S CERTIFICATE 60
9. SPECIAL SCAFFOLDS .................................. 61
9. I SCOPE 61
9.2 DESIGN AND SUPERVISION 61
9.3 NON-STANDARD STANDING SCAFFOLD 61
9.4 STANDING SCAFFOLDS WITH ATTACHMENTS 61
9.5 CANTILEVER SCAFFOLDS 62
9.6 HANGING SCAFFOLDS 62
APPENDIX A: SCAFFOLD REGISTER FOR ALL
SCAFFOLDING FROM WHICH A PERSON COULD
FALL 5 M OR MORE ......................................... 63
SCAFFOLD REGISTER 64
INSPECTION RECORD 64
APPENDIX B: SUSPENDED SCAFFOLD REGISTER
AND NOTES ON SUSPENDED SCAFFOLDING.. 66
LIVE LOAD (I.E. PERSONS, TOOLS, MATERIALS) 67
COUNTERWEIGHTING OF OUTRIGGERS 67
COUNTERWEIGHT DETERMINED USING THE FORMULA 68
SUSPENDED SCAFFOLD REGISTER 68
APPENDIX C: WEIGHTS OF MATERIALS USED
ON SCAFFOLDING .......................................... 70
APPENDIX D: SCAFFOLDING
MATERIALS TECHNICAL DATA ........................ 72
APPENDIX E: RIGGING FOR SCAFFOLDERS ... 74
GENERAL 74
SUSPENDED LOADS 74
SCAFFOLD TUBE 75
CHECKLIST 77
APPENDIX F: PERFORMANCE REQUIREMENTS
FOR SCAFFOLD PLANKS ................................. 78

NOTICE OF ISSUE
I have issued this Approved Code of Practice for the Safe Erection and Use of
Scaffolding, being a statement of preferred work practices or arrangements for
the purpose of ensuring the health and safety of persons to which this code
applies and persons who may be affected by the activities covered by this
code.
J. M. Chetwin
Secretary of Labour
September 1995
6 SAFE ERECTION AND USE OF SCAFFOLDING

FOREWORD
I have approved this statement of preferred work practices, which is an
Approved Code of Practice for the Safe Erection and Use of Scaffolding, under
section 20 of the Health and Safety in Employment Act 1992. When a code is
approved, a Court may have regard to it in relation to compliance with the
relevant sections of the Health and Safety in Employment Act. This means that
if an employer in an industry or using a process to which an approved code
applies can show compliance with that code in all matters it covers, a Court
may consider this to be compliance with the provisions of the Act to which the
code relates.
SAFE ERECTION AND USE OF SCAFFOLDING 7
Hon. Doug Kidd
Minister of Labour
September 1995

PREFACE
This revised publication on scaffolding includes changes in the legislation
which took effect from 1 April 1993. It is essential for everyone involved in
the erection and use of scaffolding to be aware of these new provisions.
The book also sets out minimum standards for the erection, use and
dismantling of scaffolds, and provides the basis of study material for persons
wishing to obtain a certificate of competency as a scaffolder.

A SUMMARY OF THE
HEALTH AND SAFETY IN
EMPLOYMENT ACT 1992
The principal object of the Health and Safety in Employment Act 1992 (HSE
Act) is to prevent harm to employees at work. To do this, it imposes duties on
employers, employees, principals and others, and promotes excellent health
and safety management by employers. It also provides for the making of
regulations and codes of practice.
REGULATIONS
Regulations are promulgated from time to time under the HSE Act. Regulations
may, among other things, impose duties on employers, employees, designers,
manufacturers, and others relating to health and safety. These regulations may
apply with respect to places of work, plant, processes or substances and may
deal with particular problems that have arisen.
APPROVED CODES OF PRACTICE
“Approved Codes of Practice” are provided for in the HSE Act. They are
statements of preferred work practice or arrangements, and may include
procedures which could be taken into account when deciding on the
practicable steps to be taken. Compliance with codes of practice is not
mandatory. However, they may be used as evidence of good practice in court.
EMPLOYERS’ DUTIES
Employers have the most duties to ensure the health and safety of employees.
Employers have a general duty to take all practicable steps to ensure the safety
of employees while at work. In particular, they are required to take all
practicable steps to:
(a) Provide and maintain a safe working environment;
(b) Provide and maintain facilities for the safety and health of employees
at work;
(c) Ensure that machinery and equipment is safe for employees;
(d) Ensure that working arrangements are not hazardous to employees;
and

(e) Provide procedures to deal with emergencies that may arise while
employees are at work.
Taking “all practicable steps” means doing what is reasonably able to be done
in the circumstances, taking into account:
(a) The severity of any injury or harm to health that may occur;
(b) The degree of risk or probability of that injury or harm occurring;
(c) How much is known about the hazard and the ways of eliminating,
reducing or controlling it; and
(d) The availability, effectiveness and cost of the possible safeguards.
HAZARD MANAGEMENT
Employers must identify and regularly review hazards in the place of work
(existing, new and potential), to determine whether they are significant
hazards and require further action. If an accident or harm occurs that requires
particulars to be recorded, employers are required to investigate it to
determine if it was caused by or arose from a significant hazard.
“Significant hazard” means a hazard that is an actual or potential cause or
source of:
(a) Serious harm; or
(b) Harm (being more than trivial) where the severity of effects on any
person depend (entirely or among other things) on the extent or
frequency of the person’s exposure to the hazard; or
(c) Harm that does not usually occur, or usually is not easily detectable,
until a significant time after exposure to the hazard.
Where the hazard is significant, the HSE Act sets out the steps employers must
take:
(a) Where practicable, the hazard must be eliminated.
(b) If elimination is not practicable, the hazard must be isolated.
(c) If it is impracticable to eliminate or isolate the hazard completely, then
employers must minimise the likelihood that employees will be
harmed by the hazard.
Where the hazard has not been eliminated or isolated, employers must, where
appropriate:
(a) Ensure that protective clothing and equipment is provided, accessible
and used;
(b) Monitor employees’ exposure to the hazard;
(c) Seek the consent of employees to monitor their health; and
(d) With informed consent, monitor employees’ health.

INFORMATION FOR EMPLOYEES
Before employees begin work, they must be informed by their employer of:
(a) Hazards employees may be exposed to while at work;
(b) Hazards employees may create which could harm other people;
(c) How to minimise the likelihood of these hazards becoming a source of
harm to themselves and others;
(d) The location of safety equipment; and
(e) Emergency procedures.
Employers are also required to inform employees of the results of any health
and safety monitoring. In doing so, the privacy of individual employees must
be protected.
EMPLOYERS TO INVOLVE EMPLOYEES IN THE
DEVELOPMENT OF HEALTH AND SAFETY PROCEDURES
Employers need to ensure that all employees have the opportunity to be fully
involved in the development of procedures for the purpose of identifying
hazards and dealing with significant hazards, or dealing with or reacting to
emergencies and imminent dangers.
TRAINING OF EMPLOYEES
Employers must ensure employees are either sufficiently experienced to do
their work safely or are supervised by an experienced person. In addition,
employees must be adequately trained in the safe use of equipment in the
place of work, including protective clothing and equipment.
SAFETY OF PEOPLE WHO ARE NOT EMPLOYEES
Employers are also responsible for the health and safety of people who are not
employees. Employers must take all practicable steps to ensure that employees
do not harm any other person while at work, including members of the public
or visitors to the place of work.
EMPLOYEES’ AND SELF-EMPLOYED PERSONS’ DUTIES
Employees and self-employed persons are responsible for their own safety and
health while at work. They must also ensure that their own actions do not
harm anyone else. However, these responsibilities do not detract from the
employers’ or principals’ responsibilities.

ACCIDENTS AND SERIOUS HARM (RECORDS AND
NOTIFICATION)
The HSE Act requires employers to keep a register of work-related accidents
and serious harm. This includes every accident that harmed (or might have
harmed):
(a) Any employee at work;
(b) Any person in a place of work under the employer’s control.
Employers are also required to investigate all accidents, harm and near-misses
to determine whether they were caused by a significant hazard.
Employers are required to notify serious harm that occurs to employees while
at work to the Secretary (in practice, the nearest OSH office), as soon as
possible. In addition, the accident must also be reported on the prescribed
form within 7 days. (Forms are included in the Workplace Accident Register
available from OSH offices and selected stationers.)
If a person suffers serious harm, the scene of the accident must not be
disturbed unless to:
(a) Save life or prevent suffering;
(b) Maintain public access for essential services, e.g. electricity, gas;
(c) Prevent serious damage or loss of property.
The OSH office will advise whether it wishes to investigate the
accident and what action may be taken in the meantime.

DEFINITIONS
Act: The Health and Safety in Employment Act 1992.
Anchorage: Component cast or fixed into the building or structure for the
purpose of attaching a scaffold or tie; it also means the holding down system
for cantilevered beams when referring to suspended scaffolding and
cantilevered platforms.
Base plate: A metal plate with a spigot for distributing the load from a
standard or raker or other load-bearing tube. An adjustable base plate is a
metal base plate embodying a screw jack.
Bay: The portion of a scaffold situated between two adjacent pairs of
standards measured longitudinally and extending the full height of the scaffold.
The bay length is the longitudinal distance between the two adjacent pairs of
standards.
Brace: A member placed diagonally with respect to the vertical or horizontal
members of a scaffold and fixed to them to afford stability.
Castor: A swivelling wheel secured to the base of a vertical member of the
scaffold for the purpose of mobilising it.
Construction work: (a) Means any work in connection with the alteration,
cleaning, construction, demolition, dismantling, erection, installation,
maintenance, painting, removal, renewal, or repair of —
(i) Any building, chimney, edifice, erection, fence, structure or wall, whether
constructed wholly above or below, or partly above and partly below,
ground level:
(ii) Any aerodrome, cableway, canal, harbour works, motorway, railway,
road, or tramway:
(iii) Any thing having the purpose of drainage, flood control, irrigation or
river control:
(iv) Any distribution system or network having the purpose of carrying
electricity, gas, telecommunications, or water:
(v) Any aqueduct, bridge, culvert, dam, earthwork, pipeline, reclamation,.
reservoir, or viaduct:
(vi) Any scaffolding; and
(b) Includes any work in connection with any excavation, preparatory work,
or site preparation carried out for the purposes of any work referred to in
paragraph (a) of this definition; and
(c) Includes any work referred to in paragraph (a) or paragraph (b) of this
definition carried out underwater, including work on buoys, obstructions to
navigation, rafts, ships, and wrecks; and
(d) Includes the use of any materials or plant for the purposes of any work to
in any of the paragraphs (a) to (c) of this definition; and
(e) Includes any inspection or other work carried out for the purposes of
ascertaining whether any work referred to any of paragraphs (a) to (c) of this
definition should be carried out; but
(f) Does not include any work in any mine, quarry, or tunnel.

Coupler: A fitting used to fix scaffold tubes together.
Employee: Subject to section (3) of the Act, means a person employed by
any other person to do any work (other than residential work) for hire or
reward; and, in relation to any employer, means an employee of the employer.
Employer: Means a person who or that employs any other person to do any
work for hire or reward; and, in relation to any employee, means an employer
of the employee.
Factor of safety: The ratio of the load that would cause failure of a member
or structure to the load that is imposed upon it in service, and, unless
otherwise prescribed or directed, shall be a minimum of 3.
Free-standing scaffold: A standing scaffold which is not attached to any
other structure and is stable against overturning on its own account or, if
necessary, assisted by rakers and anchors.
Guardrail: A rail or barrier secured to standards or upright members, and
erected along the exposed sides and ends of working platforms to prevent
persons from falling. A lower rail which is fixed to standards midway between
the guardrail and platform is termed a midrail.
Hanging scaffold: A working platform suspended by tubes, bolts, fixed rope
slings or other methods and not intended for raising or lowering while in use.
Health and safety inspector: An officer of the Department of Labour
appointed under section 29 of the Health and Safety in Employment Act 1992.
High: In relation to scaffolding, means the vertical height of the actual
scaffold (referred to in 2.2 and 2.10).
Height: In relation to scaffolding or part of scaffolding, means the greatest
vertical distance from which any article may fall from the highest working
platform of the scaffolding to the ground or structure on which the scaffolding
is supported or above which the scaffolding is suspended or fixed, as the case
may be. In determining the distance which an article may fall, no account shall
be taken of any obstruction which may delay or stop the fall unless there is no
possibility of the fall continuing after the obstruction is reached.
Ladder: Means a portable appliance consisting of two stiles joined by steps or
rungs and designed for the purpose of climbing and descending.
Ladder bracket: A bracket designed to be attached to at least two rungs of a
ladder for the purpose of supporting a plank for a person to work on.
Ledger: A horizontal member placed in the longitudinal direction between
standards for the purpose of supporting putlogs.
Lift: The assembly of ledgers and putlogs forming each horizontal level of a
scaffold. The lift height is the vertical distance between two lifts, measured
centre to centre.
Live load: That portion of a load which does not include any part of the
scaffolding or decking supporting the load, and comprises the weight of
workers and/or materials.
Notifiable work: Means (a) Any restricted work, as that term is defined in
regulation 2(1) of the Asbestos Regulations 1983:
(b) Any logging operation or tree-felling operation, being an operation that is
undertaken for commercial purposes;
(c) Any construction work of one or more of the following kinds:

(i) Work in which a risk arises that any person may fall 5 metres or more,
other than—
(A) Work in connection with a residential building up to and including
2 full stories:
(B) Work on overhead telecommunication lines and overhead electric
power lines:
(C) Work carried out from a ladder only:
(D) Maintenance and repair work of a minor or routine nature:
(ii) The erection or dismantling of scaffolding from which a person may fall
5 metres or more:
(iii) Work using a lifting appliance where the appliance has to lift a mass of
500 kilograms or more a vertical distance of 5 metres or more, other
than work using an excavator, a fork-lift, or a self-propelled mobile
crane:
(iv) Work in any pit, shaft, trench or other excavation in which any person
is required to work in a space more than 1.5 metres deep and having a
depth greater than the horizontal width at the top:
(v) Work in any drive, excavation or heading in which any person is
required to work with a ground cover overhead:
(vi) Work in any excavation in which any face has a vertical height of more
than 5 metres and an average slope steeper than a ratio of 1 horizontal
to 2 vertical:
(vii) Work in which any explosive is used or in which any explosive is kept
on the site for the purpose of being used;
(viii) Work in which any person breathes air that is or has been compressed
or a respiratory medium other than air.
Outriggers (needles): Cantilevered beams from which a swinging stage is
suspended.
Putlog (or bearer or transom): A horizontal member placed in the
transverse direction between ledgers, standards, or other supports and used to
support a working platform.
Raker: An inclined load-bearing member.
Right-angle coupler: A coupler used to join tubes at right angles.
Registered engineer: An engineer registered under the Engineers Registration
Act 1924.
Safe working load (SWL): The maximum load calculated in accordance with
sound and accepted engineering practice, which can be supported safely
under normal working conditions.
Scaffolder: A scaffolder is a person skilled and experienced in the erection,
altering and dismantling of scaffolding. A scaffolder aspires to or holds a
certificate of competency as a scaffolder.
Scaffolding: (a) Means any advanced scaffolding, basic scaffolding, or
suspended scaffolding or any framework or structure, of a temporary nature,
used or intended to be used —
(i) For the support or protection of persons carrying out construction work
or work connected with construction work, for the purpose of carrying
out that work; or
(ii) For the support of materials used in connection with any such work; and

(b) Includes any scaffolding constructed as such and not dismantled, whether
or not it is being used as scaffolding; and
(c) Includes any coupling, device, fastening, fitting or plank used in connection
with the construction, erection, or use of scaffolding.
Scaffolding process: The planning for, design and erection of, inspection of,
and use of any scaffold.
Scaffold register: A written record of inspections carried out for scaffolding.
Standard: An upright member used for transmitting the weight of the load
from the working platforms to the base of the scaffolding.
Suspended scaffold: A working platform suspended from overhead and
intended to be raised or lowered while in use.
Swivel coupler: A coupler for joining tubes at an angle other than a right
angle.
Sole plate: A timber, concrete or metal bearer used to distribute the load from
a standard or base plate to the ground.
Sound and accepted engineering practice: Means engineering practice
generally regarded as sound by those members of the engineering profession
mainly concerned with the practice and accepted as such by the Secretary of
Labour.
Span: Means the distance measured along the member between the centre
lines of adjacent supports of the member.
Special scaffold: A scaffold which differs from the standard requirements for
standing and suspended scaffolds.
Standing scaffold: A scaffold which is supported wholly or partly from its
base.
Tie: The attachment by which scaffolding is attatched to a structure; it also
means “tie and spreader” and includes the attachments used in conjunction
with the spreader or putlog extension to secure a scaffold to a building or
structure to prevent movement.
Toeboard: An upstand or vertical barrier at the edge of a platform intended to
prevent materials, or workers’ from slipping off the platform.
Transom: A lube or beam spanning across ledgers to form the support for
boards forming the working platform or to connect the outer standards to the
inner standards (see Putlog).
Working platform: That part of a scaffolding on which workers and/or
materials are supported for the purpose of carrying out construction work.

1. REQUIREMENTS
1.1 INTRODUCTION
This approved code of practice has been prepared to provide guidance on the
planning for, erection of and subsequent use of scaffolding. It has been
prepared for the scaffolding industry in particular and the construction industry
in general. It is intended to provide a link between the performance
requirements of the Health and Safety in Employment Act 1992 and the
specific requirements of scaffolding standards such as the joint AS-NZS 1576
series and the joint Australia-New Zealand Standard Guidelines for Scaffolding
1995.
The Health and Safety in Employment Act 1992 (HSE Act) and the Health and
Safety in Employment Regulations 1995 (HSE Regulations) prescribe safety
provisions for all employment categories, including the construction and
scaffolding industries. All persons engaged in scaffolding work are required to
comply with these provisions. A summary of the HSE Act and HSE Regulations
is provided in the introductory section of this document.
Suitable and sufficient scaffolding must be provided where the construction
work cannot be carried out safely by other means. Standing scaffolds,
suspended scaffolds or special scaffolds may be used.
1.2 DEFINITIONS OF SCAFFOLDING AND SCAFFOLDING
PROCESS
For the purposes of this document:
Scaffolding is defined as any structure, framework, swinging stage, suspended
scaffolding, or boatswain’s chair, of a temporary nature, used or intended to be
used for the support or protection of workers engaged in or in connection
with construction work, for the purpose of carrying out that work or for the
support of materials used in connection with any such work; and includes any
scaffolding constructed as such and not dismantled, whether or not it is being
used as scaffolding; and also includes any plank, coupling, fastening, fitting or
device used in connection with the construction, erection, or use of
scaffolding.
Scaffolding process is defined as the planning for, the design of, the erection
of, the inspection of, the use of, and the dismantling of any scaffolding. The
scaffolding process does not include the erection of structures constructed
using scaffolding components, such as falsework, temporary grandstands,
lighting towers, etc.

Notwithstanding the above definitions, those planning or constructing
temporary grandstands, falsework, lighting towers, etc., may find some of the
information in this code useful and relevant.
Further definitions are included in Appendix B of this document.
1.3 THE BUILDING ACT
Scaffolding as defined in this code and in the Building Act is not a “building”
and as such a Building Consent is not required for a scaffold. The Territorial
Authorities may impose requirements for the scaffold to protect people or
property from the building activity. This may include the need to provide
screening on the scaffold, catch fans, barriers or lighting.
The Building Code.is the first schedule of the Building Regulations 1992.
Clause F5.2 of the Building Code requires that building or demolition work be
performed in a manner that avoids the likelihood of:
(a) Objects falling on to people, on or off the site;
(b) Objects falling on property off the site;
(c) Other hazards arising on the site affecting people off the site and other
property;
(d) Unauthorised entry of children to hazards on the site.
Clause F5.3.1 requires that suitable construction methods be used to avoid the
likelihood of tools or materials falling on to places where people might be
present. Clause F5.3.3 requires that where a site contains hazards that might
attract children, the hazard be enclosed to restrict access by children. Clause
F5.3.4 requires suitable barriers to provide a safe route for public access where
lifting equipment creates a risk from objects falling, or where a similar risk
occurs. (Note: The Building Act, Building Regulations and the Building Code
should be consulted for the most current requirements).
1.3.1 TEMPORARY GRANDSTANDS AND THE LIKE
Structures such as temporary grandstands, lighting towers and similar,
constructed from scaffolding materials, are not scaffolding as defined in this
code, and hence require a building consent. Persons involved in the process of
planning or erecting such structures should seek clarification from the
Territorial Authority.
1.4 MATERIALS
The HSE Regulations and various standards prescribe scaffolding made of
timber, steel tubes, aluminium tubes or prefabricated frames. Other materials,
provided they are suitable and adequate in strength, may be used subject to
the approval of the Secretary of Labour. All scaffold materials must be in sound
condition and be examined by a competent person before use.

1.5 SCAFFOLD PLANKS
All scaffold planks must meet the performance requirements specified in Part I
of NZS 3620:1985 Specification for scaffold planks (this is reproduced in
Appendix F).
A health and safety inspector may require a test report or certificate from a
recognised testing authority for planks purporting to comply with NZS:3620
but not bearing the New Zealand Standard Certification Mark.
Planks must be frequently examined during use for splits, cracks, mechanical
damage, excessive wear and decay. Planks which are defective must be
rendered unfit for further use.
1.6 ERECTION, ALTERATION AND DISMANTLING
All scaffolding, whether notifiable or not, must be erected, altered and
dismantled by competent workers under proper supervision.
Scaffolding must not be used unless the employer or employer’s representative
on the work is satisfied that it is safe for use and complies with the regulations.
Scaffolding must not be altered or interfered with except on the instructions of
the employer or employer’s representative. Scaffolders must ensure that
members of the public are not endangered while they are erecting, altering or
dismantling scaffolds. They should also ensure that the lower working
platforms are not used while the upper lifts are being worked on unless a fully
decked platform, with screens if necessary, separates the part being erected or
dismantled from the lower part in use.
All scaffolders should have a basic knowledge of rigging (some useful hints are
given in Appendix E).
1.7 SUPERVISION
Standing scaffolding over 5 m high or intended to extend over 5 m, hanging
scaffolds of any height and suspended scaffolding of any height may be
erected, altered or dismantled only under the direct supervision of a person
who holds an appropriate certificate of competency as a scaffolder issued
under the regulations.
1.8 CERTIFICATES OF COMPETENCY
The Health and Safety Regulations require that persons who erect scaffolding,
any part of which is 5 metres or more above the ground, must hold a
certificate of competency in one of the following classes:
Basic Scaffolding: The equipment range is to include free-standing modular
system scaffolding, ropes, gin wheels, static lines and fall arrest systems.
Advanced Scaffolding: The equipment is to include free-standing modular
systems, tube and coupler scaffolding including tube and coupler covered
ways and gantries, scaffolding associated with perimeter safety screens and
shutters, cantilevered hoists with a load limit not exceeding 250 kg (materials

only), ropes, gin wheels, safety nets for public protection, and catch nets, static
lines and fall arrest systems, bracket scaffolds (tank and formwork),
cantilevered load platforms from a scaffold, cantilevered and spurred scaffolds,
barrow ramps and sloping platforms, mast climbers, and hung scaffolding
including scaffolding hung from tubes, wire ropes and chains.
Suspended Scaffolds: The equipment range is to include hand-haul and
mechanical boatswain’s chairs, building maintenance units and hand-haul and
mechanical swinging stages.
1.9 DUTIES OF PRINCIPALS, CONTRACTORS,
SCAFFOLDING ERECTORS AND USERS OF SCAFFOLDS
All those involved in the construction work have responsibilities for the
scaffolding process, and for the protection of those who use the scaffold in the
course of their work. While the actual scaffolding process can vary from
project to project, it is up to those involved to clarify the various
responsibilities. The following may provide some assistance in the clarification
of roles.
Property developers have responsibilities as principals under the HSE Act.
Main contractors, project management consultants, and subcontractors who
plan or order a scaffold erected have responsibilities as principals and as
employers under the HSE Act with respect to the scaffold. Scaffolding
contractors who erect the scaffold, and contractors and subcontractors who use
the scaffold, have responsibilities as employers under the HSE Act. Employees
of all the above have responsibilities as employees under the HSE Act.
(Note that each party can have responsibilities as both principal and employer
at the same time.)
Specific duties of each party to the scaffolding process may include the
following.
(a) Property developers, project management consultants, owners, and
persons who control the workplace need to ensure that:
(i) Adequately qualified contractors and consultants are employed on the
project.
(ii) Sufficient monies are available to fund the works and the temporary
works so that provisions can be made to protect employers, employees
and others against the various hazards that may arise.
(b) Main contractors, project management consultants or
subcontractors who engage others or contract for the erection of a
scaffold need to:
(i) Plan the work to be carried out from the scaffold and to specify any
special requirements for the scaffold, e.g. any loads the scaffold may
be expected to carry.
(ii) Co-ordinate the erection, use and dismantling of the scaffold.
(iii) Ensure the safety of others who may be in the vicinity of the scaffold,
including members of the public.

(iv) Provide for public protection including gantries, screening. This may
include co-ordination with local authorities and obtaining permits as
necessary.
(v) Provide information about the foundation conditions for the scaffold,
including information about the strength of verandahs and suspended
slabs upon which the scaffold is to be erected.
(vi) Provide information about the proximity of power lines and protective
methods.
(vii) Clearly communicate via specifications, drawings, or other
informations, the scope and all requirements for the scaffold required,
to the scaffolding erector.
(viii) Co-ordinate/delegate all subsequent inspections and alterations needed
to ensure the safety of the scaffold and those using the scaffold. This
will include the need to ensure that a scaffold register or scaffold
record system is kept up to date (see clause 1.9.1).
(ix) Ensure protection of the scaffold from construction vehicles or other
vehicles in the vicinity, including co-ordination of crane activities over
the scaffold.
(c) Scaffolding erection companies must:
(i) Develop a clear understanding of the scaffold required and the work
that is to be carried out from the scaffold, including the need for
protective gantries, screening, foundation conditions, power cables.
(ii) Design and plan the scaffold and the erection process, including
co-ordination with other employers who are in the vicinity, to ensure
safety during construction, use, alteration and later dismantling of the
scaffold.
(iii) Provide a scaffold that complies with the manufacturer’s specification
and the code of practice.
(iv) On completion of the erection of the scaffold, inspect and certify that it
is safe to use, and to hand over the scaffold to their principal. The
hand over must include any information that could affect subsequent
users of the scaffold, and any limitations of the scaffold.
(v) Co-ordinate with the principal on the need for subsequent inspections
and alterations as work proceeds on the project, e.g. alteration of
working platforms, increasing the height of the scaffold, etc.
(d) Users of the scaffold must:
(i) Understand any limitations of the scaffold that could affect their work,
e.g. load limits.
(ii) Not alter the scaffold in any way that could affect its safety.
(iii) Liaise with the main contractor or the scaffold erector to have ties,
work platforms, relocated or altered, etc., as necessary.
(iv) Carry out their own works so as not to endanger others in the vicinity.

1.9.1 SCAFFOLDING REGISTER AND INSPECTION OF SCAFFOLDS
All suspended scaffolds and all other scaffolds which exceed 5 m in height, or
from which a person could fall 5 m or more, are to be inspected before first
use and at regular intervals. Details of these inspections are to be recorded in
an on-site scaffold register or in a suitable scaffold record system and signed
by person carrying out the inspection. These inspections may be carried out by
a certificated scaffolder of the appropriate class, or by a competent person
such as a registered engineer.
(a) Initial inspection
Before first use, the scaffold is to be finally inspected and any defects found
are to be rectified before use.
(b) Subsequent inspections
The scaffold is to be inspected at the following intervals:
(i) Daily in the case of suspended scaffolds, or weekly in the case of all
other scaffolds while the scaffolds are in use.
(ii) After each structural alteration, addition or change to the nature of the
scaffold or its anchorages or ties.
(iii) Monthly while the scaffold is set up but not in use.
(iv) After any storm or occurrence that could adversely affect the safety of
the scaffolding.
Should any defect be found during these inspections, the defect must be
rectified prior to being reused.
Sample registers and checklists are included in Appendix A, although these are
offered for guidance only.
1.10 PROTECTION AND MAINTENANCE
All scaffolding must be protected against accidental damage from traffic or
other causes and should, where necessary, be barricaded or, alternatively, be
well stayed or braced to avoid damage from vehicles (fig. 1).
1.11 ACCESS TO WORKING PLATFORMS
Access must be adequate and safe for the working conditions and type of
work carried out. Employers should give consideration to the number of users
of the scaffold and their need to carry materials, tools and equipment to the
working platforms. Access may be provided by permanently installed
stairways, temporary stairways or portable inclined ladders. Employees should
not be expected to climb vertical ladders, or to climb the scaffold structure to
gain access to working platforms.
Portable ladders should comply with the following:
(a) Ladders should be pitched at a slope of not less than 1 in 4 and not
more than 1 in 6.

aa
a
aa
a
aa
aa
aaaa
aa
a
aa
Barricades to prevent
damage to the scaffold
by vehicles
Fig. 1 Vehicle entrances.
(b) Ladders should be securely tied to prevent them moving.
(c) Ladders should be provided with landings top and bottom, and the
landings should be properly guarded.
(d) Maximum height between landings should not exceed 6.3 m.
(e) Ladders should extend at least 1 m above landings.
a(e) The base of the ladder should be offset from the head of the ladder
below, so that the ladders do not form a single continuous ladder.
1.12 SCAFFOLDING NEAR ELECTRIC POWER LINES
No person shall erect any scaffold at any distance, in any direction, less than
that shown in the table (from NZECP 34:1993 Section 4 ) to any conductors of
an overhead electric line.
a
aa
aaa

Minimum Distance in Any Direction for Construction of
Scaffolding and Other Structures Near Conductors
Line Voltage Minimum Distance Under Normal Conditions
Not exceeding 66 kV (maximum span 125 metres 4.0 metres
Exceeding 66 kV (maximum span 25 metres) 5.0 metres
Any voltage (span greater than 125 metres but less than 250 metres) 6.0 metres
Any voltage (span greater than 250 metres but less than 500 metres) 8.0 metres
Any voltage (span exceeding 500 metres) As agreed with the owner of the
line but not less than 8 metres
1.13 SCAFFOLDING OVER VERANDAHS, GANTRIES OR
ROOFS
Verandahs, gantries or roofs used to support scaffolding must be certified as
safe for the purpose by a competent person such as a registered engineer. The
layout of the scaffold, including details of sole plates and the propping system,
if any, must also be provided.
1.14 LIFTING APPLIANCES MOUNTED ON SCAFFOLDING
Hoists, winches and other lifting appliances may be mounted on scaffolding
only if the scaffold framework is adequate in strength or is specially
strengthened and tied back to reduce vibration and whip.
The strengthening must be calculated with reference to an effective static load
of not less than two times the safe working load of the lifting appliance.
Where the lifting capacity exceeds 250 kg (2450 N), the scaffold must be
strengthened to the design requirement of a registered engineer.

(a) Standards passing
through verandah
(b) Props directly
under standards
(c) Standard passing
through verandah
(d) Props directly under standard (e)
Permanent
verandah
(f) Inside prop removed if
verandah connection is sound
(g) Sound cantilever verandah (g) Gantry
50 mm thick
sole plates
Fig. 3 Some methods of
supporting scaffolding on or
over verandahs.
NOTES
(a) to (f) built on a permanent
verandah.
(c) to (g) All require a registered
engineer's certificate.
(c), (d), (e), (f) and (g). These could be
used only where verandah connection
to building is sound and strong. Use
50 mm thick sole plates at all times.
Sole plates on top of verandah or gantry
to be at right angles to main members.
Scaffold should be protected to avoid
being damaged by passing traffic.

2. DESIGN
REQUIREMENTS
2.1 PRINCIPLES OF DESIGN
The design of the scaffold shall take into account the following:
(a) The strength, stability and rigidity of the supporting structure;
(b) The handling normally associated with scaffolding;
(c) The safety of persons engaged in the erection, alteration and
dismantling of the scaffold;
(d) The safety of persons using the scaffold;
(e) The safety of persons in the vicinity of the scaffold.
2.2 BASIS OF DESIGN
The design of the structural members and components of a scaffold shall
comply with NZS 3404.1, NZS 3603, AS 1538 or AS 1664.
Welding shall comply with AS 1554.1, AS 1665 or NZS 4701, as appropriate.
2.3 LOAD COMBINATIONS
Where scaffolding is designed, it shall be designed for the most adverse
combination of dead loads, live loads and environmental loads that can
reasonably be expected during the period that the scaffold is expected to be in
service.
Load combinations for strength limit states shall be in accordance with NZS
4203, except that dead and live load combinations shall be as follows:
2.0G + 2.0Q
where
G = dead load
Q = live load (including impact, if any).
Where environmental loads will be such that work is unlikely to proceed
under those conditions, then the worst case may be restricted to dead loads,
expected live loads from stacked materials and environmental loads.
For permissible stress design, the sum of the dead and live loads applied shall
be increased by 15 percent, to allow for re-use of materials.

2.4 DESIGN LOADS
2.4.1 DEAD LOAD
The dead load (G) shall include the self-weight of the scaffold structure and
components including working platforms, catch platforms, access platforms,
stairways, ladders, screens, sheeting, platform brackets, suspension ropes,
secondary ropes, traversing ropes, tie assemblies, scaffolding hoists, electrical
cables and any other attachments, where appropriate.
2.4.2 ENVIRONMENTAL LOADS
Where appropriate, the environmental loads shall include the following:
(a) Wind loads in accordance with NZS 4203 imposed on the scaffold,
including any guardrails, toeboards, stacked materials, screens,
sheeting, platform ropes, guy wires and other attachments;
(b) Snow loads in accordance with NZS 4203;
(c) Rain and ice loads, where it is considered likely that the scaffold and
claddings will be subjected to rain or a build-up of ice;
(d) Earthquke loads in accordance with NZS 4203.
2.4.3 LIVE LOADS
2.4.3.1 General. The live load (Q) shall include the following:
(a) The weight of persons;
(b) The weight of materials and debris;
(c) The weight of tools and equipment;
(d) Impact forces.
2.4.4.2 Duty Live Loads. The live load applied to a working platform shall be
categorised by the following duty conditions:
(a) Light-duty, a load of 2.2 kN per bay that includes a single concentrated
load of 1 kN;
(b) Medium-duty, a load of 4.4 kN per bay that includes a single
concentrated load of 1.5 kN;
(c) Heavy-duty, a load of 6.6 kN per bay that includes a single
concentrated load of 2.0 kN;
(d) Special-duty, the largest intended load but not less than heavy-duty.
For design purposes, the single concentrated load shall be assumed in the
most adverse position within the bay.

2.5 SUPPORTING STRUCTURE
2.5.1 GENERAL
The supporting structure shall be capable of supporting the most adverse
combination of loads applied by the scaffold during the period of its service.
2.5.2 STRENGTHENING OF SUPPORTING STRUCTURE
Where the supporting structure is not capable of supporting the most adverse
combination of expected loads in Clause 2.5.1, it shall be strengthened by
propping or other means.
2.5.3 SOLEPLATES
Where soleplates are required, they shall be designed to distribute the load
from a scaffold to the supporting structure.

3. STANDING
SCAFFOLDS
Fig. 4 Support for tubular scaffold standards.
3.1 SCOPE
This part covers standing scaffolds which are supported wholly or partly from
their base. The scaffolds may be either free-standing or held sideways by ties,
rakers or other means.
The kinds of scaffolds generally used are:
(a) Timber scaffolding;
(b) Tube scaffolding in steel or aluminium; and
(c) Scaffolding with proprietary equipment.
3.2 FOUNDATIONS
Scaffolding foundations must be adequate to carry the whole weight of the
scaffold, including the imposed loads, and must be maintained in a stable
condition during the life of the scaffold. Steel base plates must be used under
all standards.
When scaffolds are supported on the ground, suitable sole plates must be used
to spread the load. The sole plates should preferably be long enough to
support at least two standards. (See fig. 4).
Timber sole plates must be not less than 200 x 38 x 500 mm long. Bricks,
blocks and similar loose material are unsuitable as they are liable to fall over
or split, and are easily driven into the ground.
Where the foundation is levelled concrete of adequate thickness or of a similar
hard surface, the sole plate may be omitted, but steel base plates must be
provided at the bottom of all standards.

3.3 WORKING PLATFORMS
Working platforms are classified as light-duty, medium-duty, heavy-duty or
special-duty.
3.3.1 LIGHT-DUTY PLATFORMS
For light-duty platforms, the maximum longitudinal standard spacing is 2.4 m
and the maximum standard spacing is 1.5 m.
3.3.2 MEDIUM- OR HEAVY-DUTY WORKING PLATFORMS
For medium- or heavy-duty working platforms, the following additional
requirements must also be complied with:
(a) Where the span exceeds 2.0 m, one intermediate putlog must be
provided at mid-span to support timber scaffold planks; this
requirement does not apply to metal planks (fig. 5).
(b) When the live load is not evenly distributed over the platform, as in the
case of a blocklayer’s scaffold which has bricks or concrete blocks
stacked on the outside edge of the platform, the outside ledger which
carries most of the load must be supported by an additional standard,
with intermediate putlog placed at mid-span (fig.5).
(c) When the total live load of 4.4 kN or 6.6 kN is not uniformly
distributed but is concentrated at mid-span, e.g. concrete blocks
stacked on pallets, an additional pair of standards with intermediate
putlog must be provided at mid-span.
Fig. 5 Medium- or heavy-duty load.
Additional standards at mid-span
Intermediate putlogs at mid-span
Additional standard
1.5 m max. between standards.
Note: End toe board not shown
for clarity.

Plank
220 mm max
(b)
75 mm minimum bearer
150 mm minimum bearer
(c)
3.3.2 HEAVY-DUTY PLATFORMS
For heavy-duty platforms, the maximum longitudinal standard spacing is 1.8 m
and the maximum transverse standard spacing is 1.275 m.
2.4.3 SPECIAL-DUTY WORKING PLATFORMS
Special-duty working platforms are platforms that do not conform to the
requirements of either a light-duty or heavy-duty platform with respect to
loading and/or dimensions. The platform must be of adequate strength and
stability. The health and safety inspector may require a registered engineer's
design certificate for a special-duty platform.
3.4 PLATFORM DECKING
The decked width must be not less than 675 mm, with sufficient additional
width to leave 450 mm minimum clear walkway at all times (fig. 6).
The distance between the outer edge of the platform to be guarded and the
projection of the inner vertical face of a guardrail must not exceed 200 mm.
Scaffold planks must be so placed, locked or secured as to prevent tipping or
displacement during normal use, or movement by strong wind. End overhang
must be 80 mm minimum to 220 mm maximum.
Fig. 6 Decking.
200 mm max
675 mm min
width
Minimum plank size 225 mm
Tie
(a) 160 mm minimum
(d)
Edge of decking as close
as practicable to working
face
80 mm min

It is good practice to butt planks in a decked platform. When butted, each end
bearing shall be not less than 75 mm. When lapped, the amount of overlap
must be not less than 150 mm. Decking planks which are lapped must be
fitted with wedge cleats or fillets to reduce the risk of tripping or facilitate the
wheeling of loads.
Every working platform must be decked as close as practicable to the working
face of the structure it is being used with.
Where the height is greater than 3 m, a guardrail or other protection must be
provided within 200 mm of the outer edge of the plank
3.5 GUARDRAILS AND MIDRAILS
Guardrails, including midrails, must be provided on the exposed sides and
ends of all working platforms more than 3 m in height (fig. 7). The height to
the top of the guardrail must be not less than 0.9 m or more than 1.1 m from
the deck to be protected.
A midrail is not required on a working platform which:
(a) Is provided with a toeboard of 225 mm minimum height; or
(b) Is provided with equivalent protection.
Maximum
200 mm
Fig. 7 (a) Guardrails.
Fig. 7 (b) Guardrails.
1000 mm min
1100 mm max
Maximum
200 mm
1000 mm min
900 mm min 1100 mm max
1100 mm max
Level of deck
Double cross-bracing
Rail at 700 mm
1050 mean
min height
Level of deck

A guardrail, including a midrail, must be:
(a) In a plane parallel with the outside ends or exposed edges to be
Toeboard as high as
materials stored
on platform
Materials
Fig. 8 Toeboard.
guarded;
(b) Secured to the inside of the standard; and
(c) Kept in place except when removed temporarily for access.
Cross-bracing (double) as used in some frame scaffolds is acceptable in place
of a guardrail, if the platform is decked out to within 200 mm horizontally from
the cross-bracing, and the braces cross within 50 mm of the mean guardrail
height of 1050 mm above the platform. However, a rail at height 700 mm
above deck level must be provided (fig. 7(b)).
The guardrail may be fixed to the outside of the standard. To facilitate the
movement of materials, guardrails and toeboards may be temporarily removed,
but they must be replaced as soon as practicable.
Each rail, when secured to the standards or upright members, must be capable
of sustaining without failure or undue deflection a force at any point of 70 kg
(690 N) vertical and 45 kg (440 N) horizontal, acting separately.
3.6 TOEBOARDS
A toeboard or equivalent protection must be fitted on the outside edge of
every working platform more than 3 m in height, if materials and tools are
placed on the platform and are likely to be dislodged (fig. 8). The toeboard
must be of sufficient height and strength to prevent the tools or materials from
falling and must be secured to the inside of the standards. A scaffold plank of
225 mm minimum width may be used as a toeboard.
3.7 SCREENS
Where the scaffold platform is above a public thoroughfare, and due to the
nature of the work falls of material are possible with injury to passers-by,
special precautions must be taken. Special protection may consist of:
(a) Screening the working platforms with robust screens or steel mesh to
a height of at least 1 m. The mesh opening shall not exceed 50 mm.
(b) Providing catch screens where the horizontal distance from the
scaffolding is more than half the vertical distance between the screen

aa
a
aaa
aa
aa
a
aa
a
aaand the middle of the topmost working platform of the scaffold.
Containment sheeting may be used to provide protection to the public
from the construction works being carried out or to provide weather
protection for construction workers working on or about the
scaffolding.
Containment sheeting increases the dead load on the scaffold, and
greatly increases the wind load on the scaffold. It is unlikely that
black wire ties commonly used to tie scaffolds, will be sufficient where
containment sheeting is used. For this reason it is essential that
scaffolds that are to be sheeted be designed and approved by a
competent person such as a registered engineer experienced in scaffold
design.
When selecting containment sheeting the following should be
considered:
• Degree of weather protection required;
• Degree of protection to the public that is required;
• Light transmission to the workface;
An alternative method with screen material over whole
face in demolition work or full face chipping
a
a
Containment sheeting
a34 SAFE ERECTION AND USE OF SCAFFOLDING
Fig. 9 Screens.
a
a
This space to be
filled in to stop
debris falling
(a)
Screen of fine netting, canvas, timber,
or metal mesh between guardrail and
toeboard
Toeboard (b)
Catch screen over
thoroughfarea
a
aa
(c) (d)

aW
aa
aa
aaa
a
aLifts maximum of
• Self-weight and wind load onto the supporting surface;
• Size of the sheets, the frequency and pattern of fixing points
(some sheeting may require additional ledgers);
• Flammability of the sheeting;
• Ventilation of the material.
It may be necessary to provide caps on putlogs and transoms to
minimise chaffing to the sheeting.
(Hessian is not considered a suitable material for containment
sheeting as it is not sufficiently robust and it has a high fire risk.)
2.1 m with
minimum of 1.8 m
headroom if used
as a regular
walkway
Tie at or
near top
lift
Tie
and
strut
Tie
required
at first
lift
Extra
bracing
3.8 HEADROOM AND LIFTS
A scaffold platform used as a regular walkway or for the wheeling of loads
must have a clear headroom of at least 1.8 m along the mid-half width (fig.
10).
Where a succession of platforms is used to work up or down a face, the
vertical spacing of lifts must not exceed 2.1 m except for the first lift, which if
Fig. 10 Headroom.
Centre line of frame
(a)
Not less than 1.8 m
Centre line of frame
Not less than 1.8 m
W
(b)
Not less than 1.8 m
Not more than 2.1 m
a(c) 1.8 m(d)
3.0 metres
maximum for
first lift

aaaaa
aa
Wire tie fastened
to approved
anchorage or
through bolt or to
a strong backaa
necessary may be up to 3 m to allow for satisfactory working conditions at
ground or floor level. When the height of the first lift exceeds 2.1 m, extra
bracing must be provided on each pair of standards, commencing at
approximately 1.8 m from the ground.
3.9 HEIGHT OF SCAFFOLDING
The height of any scaffolding depends upon its foundation, the size and type of
material used in the construction of the standards, spacing of ties, and the
lateral stability in all directions of the scaffolding as a whole. The maximum
height of a scaffold constructed in accordance with this code of practice is
33 m. Scaffolds in excess of 33 m must be subject to specific design and require
a registered engineer's certificate.
3.10 TIES
Ties must be provided to prevent inward and outward movement of the
scaffold and to assist the standards to act as load-carrying vertical members (fig.
11). Ties must be fixed to standards and as close as practicable to ledger
intersections. Ties must also be uniformly spaced, vertically and horizontally,
over the face of the scaffolding, including the level of the topmost working
platform. The tie spacing must be in accordance with the spacings
Spreader or putlog
extension Standard
Right-angle
coupler
Putlog
Wire tie
twitched tight
aa
(a) Layout (b) Detail of a tie (ledger omitted for clarity)
Fig. 11 Ties.
A tie must be capable of safely withstanding a horizontal force equivalent to 10
percent of the weight of the scaffold plus the full live load on the area of
scaffolding in the vicinity of each tie, or the environmental loads of NZS 4203.

The safe load of a tie must not exceed one-quarter of the breaking load of tie
and anchorage.
A tie that is not capable of transmitting tension and compression must be used
in conjunction with a spreader or putlog extension. They must be placed close
to each other and be adequately held in position.
A wire tie must be fastened to a structure by an approved anchorage, a
through bolt or tied to a strong back. The strength of the building structure at
the location of the tie must be checked for its adequacy to sustain the loads
which will be transferred to it.
When intending to fix cast-in and drilled-in anchorages, the manufacturer’s
recommended safe working load may be used.
Where the tie spacing of table 1 cannot be complied with, additional plan
bracing or dogleg bracing shall be provided between tie points.
Tied standard Tied standard
3.11 BRACING
Adequate bracing must be provided as follows:
3.11.1 PLAN BRACING
Where the horizontal tie spacings cannot be complied with, plan bracing shall
be provided. Even with this bracing provided, the maximum horizontal
distance between tie points shall not exceed 9.6 m. (Fig 12(a)).
9.6 m or 4 standards max
Fig. 12 (a) Plan bracing where horizontal tie distance is excessive.
Note that substantial ties are required.
3.11.2 DOGLEG BRACING
Where it is impracticable to fit ties at the vertical spacing specified, dogleg
bracing shall be provided. With such bracing the distance between tie points
shall not exceed 8.4 m or 4 lifts. (Fig.12 (b)).
Temporary ties may be required to ensure stability of the scaffold during
erection and dismantling.
When plan or dogleg bracing is used, the ties are required to carry substantial
loads. The ties shall be capable of carrying this load.

a
aa
(a)
a
a
aa
a
aa(a) Transverse diagonal bracing must be fixed to each end pair of
standards and at not more than every tenth pair of standards along the
scaffold. This bracing may be temporarily removed on a working lift to
facilitate movement of materials but must be replaced as soon as
practicable. This bracing is not required when dogleg bracing is used
in lieu of ties.
Tie level 8.4 m
or 4 lifts
(d)
(c)
(b)a
a
aa
(a)
Transverse
(b) (c) (d)
Longitudinal
Dog leg bracing
Tie level
Standards
Fig. 12 (b) (Cross section) Dogleg bracing used when vertical distance between
ties is excessive. Note that substantial ties are required.
Fig.13 Bracing.

(b) Longitudinal diagonal bracing must be fixed to the external face of the
scaffold, and at regular intervals along its length. The bracing, which is
required to resist wind and earthquake forces in particular, must be
capable of withstanding a horizontal force of not less than one-tenth of
the total of the weight of the scaffold and the full live load on the
working platforms. Some methods of arranging diagonal bracing for
scaffolds are illustrated in fig. 13.

4. TIMBER
SCAFFOLDING
4.1 SCOPE
This part refers to standing scaffolds which comprise standards, ledgers,
guardrails and putlogs made of timber.
4.2 QUALITY OF TIMBER AND FITTINGS
Radiata pine and Douglas fir are suitable timbers for use in timber scaffolding
and must be either No.1 framing grade or standard building grade as specified
in NZS 3631:1978 Classification and grading of New Zealand timber.
Other species of timber may be used if they are of equivalent strength and
quality.
All timber used in scaffolding should be preservative treated in accordance
with an appropriate commodity specification of the Timber Preservation
Authority.
Commodity Specification C7 is suitable for external scaffolding except when
standards and sole plates are in direct contact with the ground, in which event
it is necessary to treat to C3 Commodity Specification. For indoor scaffolding,
boron-treated timber is satisfactory. Untreated timber may be acceptable if the
timber is sound and unlikely to deteriorate during the life of the scaffold.
Fittings used for connecting joints between standards ledgers and braces must
be of adequate strength and be maintained in good condition.
4.3 SPECIFIC REQUIREMENTS
The design and construction of timber scaffolding for the support of both light-duty
and heavy-duty working platforms must be carried out in accordance
with sound engineering and trade practices and conform to appropriate New
Zealand Standards. The requirements for single-standard (pole) light-duty
scaffolds with putlogs cleated to wall or frame and for use up to 5 m high are
summarised below and illustrated in fig. 15.
4.3.1 STANDARDS
100 mm x 50 with a maximum spacing of 2.4 m.

4.3.2 PUTLOGS
150 mm x 25 mm or l00 mm x 50 mm for a maximum span of 1.2 m or 2/150
mm x 25 mm for a maximum span of 1.5 m.
4.3.3 BRACING
Each standard must be tied to the wall by a putlog and braced longitudinally
by a ledger and at least two diagonal braces in the length of the scaffold. An
additional diagonal brace at 40° to 50° slope must also be provided for every
20 m length of scaffold. Minimum size of brace to be 100 mm x 50 mm or 150
mm x 25 mm.
4.3.4 GUARDRAIL AND MIDRAIL
Minimum size 100 mm x 50 mm.
Fig. 14 Single standard light-duty scaffold

5. TUBE SCAFFOLDING IN
STEEL OR ALUMINIUM
5.1 SCOPE
This part deals with standing scaffolds where the standards, ledgers guardrails,
midrails and putlogs are made of steel or aluminium tubes. The general rules
may be applied to hanging scaffolds made of metal tubing.
5.2 GENERAL REQUIREMENTS
The general requirements for metal tubes and fittings of steel or aluminium
are:
(a) Metal tubes must be purpose made with outside diameters accurately
gauged to fit properly into the metal couplings and to allow complete
interchangeability.
(b) Tubes in use on a scaffold must be in good condition, free from bends
and defects that might affect strength, reasonably free from corrosion
and cut square at the ends. Tubes which are 3 m and over in length
should be reamed, if cut, to ensure safety when using internal joiners.
(c) When the loss of metal by corrosion or other causes reduces any cross
section of a tube so that its corresponding weight is less than 90
percent of its original weight, the affected length of tube is to be
discarded and rendered unfit for further use in scaffolding.
(d) Steel tubes must be hot-dipped galvanised or painted when used in
scaffolds which are exposed for prolonged periods to marine or
corrosive atmospheres.
(e) Fittings and couplings must be specially made for the tubes in use and
must be of a satisfactory quality as to strength and performance.
(f) Fittings must be carefully maintained in good order and condition.
They must not be left lying around but stored in bags, boxes or bins,
and kept well oiled and protected from rusting.
Special attention must be given to the care and checking of screw
threads and nuts; worn or distorted parts must be discarded or
replaced. Cracks or other flaws must be watched for.

5.3 MATERIALS
5.3.1 STEEL TUBES
Steel tubes shall comply with AS 1576.3 or BS 1139 and meet the following
requirements:
Minimum yield strength 200 MPa
Outside diameter 48.3 mm
Minimum wall thickness 4.0 mm
Where steel tubes complying with BS 6323 parts 1 to 4, and with a minimum
outside diameter and wall thickness 48.3 mm and 3.2 mm respectively are used
for scaffolding, such tubes shall be galvanised in accordance with Annex A of
BS 1139 section 1.1.
5.3.2 ALUMINIUM TUBES
Aluminium tubes shall comply with AS 1576.3 or BS 1139 part 1.2 and meet
the following requirements:
Minimum yield strength 241 MPa
Outside diameter 48.4 mm
Minimum wall thickness 4.47 mm
5.3.3 COUPLERS AND ACCESSORIES
Couplers and accessories shall comply with AS 1576.2 or BS 1139 as
appropriate for scaffold system being considered.
5.4 SPECIFIC REQUIREMENTS FOR STANDING
SCAFFOLDS
5.4.1 STANDARDS
Standards must be pitched on base plates and set up vertically with spacings in
accordance with table 1. Joints in standards must be staggered and must not
occur:
(a) In adjacent standards in the same lift, i.e. joints should be two bay
lengths apart; or
(b) In the same standard in adjacent vertical lifts, i.e. joints should be two
vertical lift heights apart.
Sleeve couplers or spigot fittings shall be used to connect standards.
5.4.2 LEDGERS
Ledgers must be:
(a) Continuous for the full length of the scaffold;

(b) Attached to both rows of standards at the level of each lift; and
(c) Horizontal and fixed with right-angle couplers to the inside of the
standards.
Joints in ledgers shall be staggered and shall not be located in the middle third
of the distance between adjacent standards, or in horizontally or vertically
adjacent ledgers in the same bay.
Sleeve couplers or spigot fittings shall be used to connect ledgers.
Ledger spacings must conform to table 1.
5.4.3 PUTLOGS
Putlogs must be placed at each pair of standards for all scaffolds.
For a medium-duty scaffold, one intermediate putlog must also be provided in
each bay to support timber scaffold planks when the span exceeds 2 m.
For a heavy-duty scaffold, one intermediate putlog must be provided to each
bay to support timber scaffold planks when the span exceeds 1.6 m.
Putlogs may be connected to ledgers with either right-angle couplers or putlog
couplers. However, right-angle couplers only must be used when putlogs are
required to transmit forces, that is when:
(a) Putlogs are underslung from ledgers;
(b) Putlogs are used as ties and spreaders;
(c) Putlogs are placed adjacent to ties and spreaders;
(d) Putlogs are to be connected to braces.
Putlog spacings must comply with table 1.
5.4.4 TIES
Ties must be uniformly spaced over the face of the scaffolding in accordance
with table 1.
5.4.5 BRACES
Braces comprising scaffold tubes must be connected as close as practicable to
standard ledger intersections.
Where required:
(a) Transverse diagonal bracing must be fixed at each lift, either to ledgers
with right-angle couplers or to standards with swivel couplers.
(b) Longitudinal diagonal bracing must be fixed to every standard with
swivel couplers and/or to extended putlogs on every lift with right-angle
couplers.
Diagonal bracing must be continuous and be joined with sleeve couplers.
The detailed requirements for steel and aluminium tubular scaffolds are
summarised in table 1.

TABLE 1: TUBULAR SCAFFOLDS IN STEEL AND ALUMINIUM
Member Light- Medium- Heavy-
Duty Duty Duty Notes
1. Working Platforms (i) Maximum height of scaffold must not exceed 33 m.
Number per bay that may be used (ii) Height of each lift must not exceed 2.1 m, except
at one time, when for the first lift which may be up to 3 m in height.
(a) height does not exceed 33 m 2 1 1
(b) height does not exceed 13.5 m 4 2 2
2. Scaffold Planks When the span of a medium-duty platform decked ...
with timber planks exceeds 2.0 m, one intermediate
(a) Timber planks putlog must be used.
(solid or laminated) 2.4 m 2.0 m 1.2 m One intermediate putlog must be used on heavy-duty
(b) Metal planks platforms decked with timber planks.
(steel or aluminium) 2.4 m 2.4 m 1.8 m
3. Standards (i) All members, including bracing, guardrails and
(a) Longitudinal spacing 2.4 m (max) 1.8 m midrails, consist of either steel tubes for steel
(b) Transverse spacing 1.55 m (max) 1.27 m scaffolds, or aluminium tubes for aluminium scaffolds.
Aluminium tubes and steel tubes must not be mixed
4. Ledgers unless it is a requirement of a special design.
(a) Horizontal spacing (between (ii) Putlogs are connected to ledgers at each pair of
standards) 1.45 m standards.
(b) Vertical spacing (i.e. Iift height) 2.1 m (max) (iii) Guardrails and midrails are fixed to the inside of
1.8 m (min) standards.
5. Putlogs (iv) All dimensions are from centre to centre of the
Maximum span 1.45 m 1.27 m respective members.
6. Ties (i) One tie must be provided at or as near as
(a) Horizontal spacing 4.8 m (i.e. on alternative practicable to the top-most working platform.
pair of standards) (ii) The vertical tie spacing may be increased to
(b) Vertical spacing 4.2 m (i.e. on alternative 8.4 m provided one substantial tie is placed at the
lifts) top-most working platform and that transverse dogleg
bracing is used on alternate pairs of standards.
(iii) The horizontal tie spacing may be increased to
9.6 m provided that substantial ties are placed at the
end pairs of standards and that plan bracing is
placed at the level of the ties.
7. Bracing At each end of standards and at not more than every
(a) Tranverse diagonal tenth pair of standards along the scaffold. This is not
required when dogleg bracing is used in lieu of ties.
(b) Longitudinal diagonal One diagonal for every 3 bays or less in length, and 3
lifts in height of scaffold, on outer face and at approxi-mately
40o slope, arranged either in a zigzag pattern .
from bottom to top or sloping continuously from ...
bottom to top (see fig. 13).

6. SCAFFOLDING WITH
PROPRIETARY EQUIPMENT
aa
aaa
a
a
200 mm min
a
aFirm footing
6.1 SCOPE
This part deals with standing scaffolds made from proprietary components and
comprises prefabricated frames and members, or unit-assembled equipment.
Where equipment comprises a complete set of components of unique design,
the supplier of the system must provide a complete set of instructions for the
safe erection and use of the scaffold. The supplier’s instructions for use must
always be followed. When properly assembled, with all fittings tightened, the
scaffold must be equivalent in strength to the standard tubular scaffold of
similar height and width. It must be sufficiently robust to resist deformation
under normal handling conditions and to provide adequate transverse stiffness
to each pair of standards.
Scaffolds must be properly braced by cross-bracing or diagonal braces, or
both, for securing vertical members together laterally, and the cross braces
must be of such length as will automatically square and align vertical members
so that the erected scaffold is always plumb, square and rigid. All brace
connections must be made secure.
Scaffold legs must be set on either plain or adjustable bases.
Where it is necessary to extend the legs of frames because of uneven
foundation levels, special care must be taken. Adjustable screw extension
pieces must have at least 200 mm length of spigot inside the upper tube
(fig. 15). Packing that is built up to provide a firm footing must be so arranged
as to avoid possible displacement, with the least plan dimension of the
packing being twice its height.
All equipment must be either hot-dipped galvanised or suitably painted when
used in scaffolds which are exposed for prolonged periods to marine or
corrosive atmospheres.
Fig. 15 Adjustable screw extension.

6.3 FRAME SCAFFOLDING
Frame scaffolding in this context means the portal-frame type scaffolding
assembled on the site from prefabricated frames and members. Frames of
different proprietary types must not be intermingled. Where frames are super-imposed
vertically, the connection must be such that:
(a) The standards are held in linear alignment.
(b) The panels are locked together vertically by joint pin couplers or other
equivalent suitable means.
Number of working platforms should be the same as standard tubular
scaffolding. Longitudinal bracing depends on the use of ledgers:
(a) Without ledgers, both faces of the scaffold in each lift of each bay are
to be cross-braced.
(b) With ledgers, brace either with diagonal tubes as for tubular
scaffolding, or cross-braced every bay for the first 12 m height of
scaffold, reducing to one bay in two for the next 12 m height up, and
one bay in four for the top 9 m of height (see fig. 16).
Guardrails and midrails must be provided at working platform levels when
cross braces are removed.
6.4 UNIT-ASSEMBLED SCAFFOLDING
Unit assembled scaffolding means scaffolding assembled from prefabricated
frames or members which are not single lift portal-frame type units. The
specific requirements are:
(a) Erection must be carried out in accordance with the supplier’s
instructions and meet the requirements of this code.
(b) Spacing of unit frames will, in general, be less than for tube and frame
scaffolding unless ledgers are used.
(c) Bracing will be the same as for the scaffolding.
(d) Because of the lack of continuity in standards and of the lesser rigidity
in the transverse corner joints, special attention must be given to
provide an adequate number of ties to prevent lateral movement.
(e) Scaffold constructed from light-weight aluminium tube (less than 2 mm
wall thickness) shall not exceed 9 m in height unless subject to special
design.
6.5 BRACKETS
6.5.1 PREFABRICATED SCAFFOLD BRACKETS
Prefabricated scaffold brackets which are attached to a structure to provide
support for a working platform must:
(a) Have adequate and suitable means of attachment to provide vertical
support and to resist accidental sideways movement.

a
aaa
aFig. 16 Minimum bracing for light-duty frame scaffolds.
a
9 m
12 m
12 m
Maximum
height 33 m
Cross brace
(1 bay in 4)
Cross brace
(1 bay in 2)
Cross brace
(Every bay)
Continuous
ledgers
above
12 m level
Below this
height
ledgers may be
omitted if used
for light-duty
NOTE:
(a) For medium-duty frame scaffolds, diagonal bracing must be used as for tubular scaffolding.
(b) Be stable in the longitudinal direction of the platform under the
applied horizontal force referred to in 2.2(b) and 2.2(c) and have a
factor of safety of not less than 1.5.
(c) Be fitted with a guardrail and a midrail when workers risk a fall of
3 m or more.
6.5.2 LADDER BRACKETS
Ladder brackets which are used for supporting a working platform for the
purpose of painting only must satisfy the following requirements:
(a) The brackets are attached to ladders which are not inferior to the
requirements set out in either NZS 3609: 1978 Timber ladders or NZS
5233: 1981 Portable ladders (other than timber ladders).
(b) The ladders used for attaching the brackets to not exceed a maximum
working length of 7.8 m.
(c) The top rung to which each bracket is attached is not more than three-quarters
of the ladder’s working length from the foot of the ladder.
(d) A guardrail and a midrail are provided when the working platform is
more than 3 m in height; the working platform must also be
underslung when it exceeds this height.

(e) Precautions are taken to ensure that the feet and tops of the ladders
are so supported that the ladders will not slide sideways or outwards.
(f) Only one person works on the platform at one time and, if the
platform is being used in a public place, a second standby worker is
on hand to take preventive action against mishaps and to assist in
setting up and moving ladders, brackets and scaffold planks.
(g) The span and quality of the plank used complies with the provisions
relating to light-duty working platforms.

aaa
a
a
a
aa
a
a
a
aaa
a
a7. FREE-STANDING
SCAFFOLDS
7.1 FREE-STANDING SCAFFOLDS
7.1.1 DEFINITION
A free-standing scaffold is a standing scaffold which is not attached to any
other structure and is stable against overturning on its own account or, if
necessary, assisted by rakers and anchors (see fig. 17).
Free-standing scaffolds include:
(a) Tubular scaffolds (with or without rakers);
(b) Frame scaffolds (with or without rakers);
(c) Mobile scaffolds (without ties or rakers); and
(d) Trestle scaffolds (without ties or rakers).
Fig. 17 Free-standing scaffolds.
7.1.2 GENERAL REQUIREMENTS
Working platforms may be designed for either light-duty or heavy-duty
loading, and are normally restricted to one per scaffold.
Stability is dependent on the ratio of height to the least width of base, and this
Height
Raker Brace
Base width l
not less than
1/2 height
(a) Tubular Scaffold (b) Frame Scaffold (c) Mobile Scaffold

must not exceed three, unless the special requirements set out in 7.1.3 are
complied with. Raker frames may be included as part of the minimum base
dimension.
Diagonal bracing is necessary on both faces and ends, except where frames
with adequate built-in stiffness are used for one or two lifts in height. In these
cases face bracing alone is necessary.
Access and egress from working platform to base must be provided. A free-standing
scaffold may be converted temporarily into a laterally supported
standing scaffold:
(a) To support more than one working platform; and
(b) To increase the height to width ratio; provided the converted scaffold
with ties or rakers meets the code requirements for strength and
stability.
Free-standing scaffold frames must be adequately restrained from vertical
separation due to accidental causes.
7.1.3 STABILITY
All free-standing scaffolds must be stablised against overturning forces. The
factor of safety against overturning in any direction shall be not less than:
(a) 1.5 for scaffolds not exceeding 3 m in height; and
(b) 3 for scaffolds exceeding 3 m in height.
Note:
(i) The factor of safety against overturning is the ratio of the
righting moment to the overturning moment from forces acting
on the scaffold;
(ii) The overturning moment may be due to eccentric dead and live
loads on the scaffold, and/or wind; and
(iii) The righting moment is provided by the self-weight if suitably
centred, added counterweight and the forces in the raker or
anchor, if any.
7.2 MOBILE SCAFFOLDS
7.2.1 DEFINITION
A mobile scaffold is a special type of free-standing scaffold supported on
wheels, castors or other devices for ease of movement on a firm level surface.
7.2.2 SPECIFIC REQUIREMENTS
Design and construction must be in accordance with sound engineering
practice.
Scaffolds must be properly braced by cross-bracing or diagonal braces, or

both, for securing vertical members together laterally. Horizontal, diagonal or
cross-bracing must be provided immediately above the wheels or castors (see
fig. 18).
Castors should be of the swivel type and have a minimum wheel diameter of
125 mm. Wheels or castors must be fixed to scaffold uprights, or be socketed
into the scaffold uprights, a minimum length of 150 mm, to avoid becoming
dislodged during movement on uneven floors.
Horizontal diagonal braces
as near bottom as possible
(a) Mobile frame (a) Mobile tube
Horizontal diagonal braces
as near bottom as possible
Fig. 18 Free-standing mobile scaffolds.
When the scaffold is in use, the wheels or castors must be effectively locked
and should be turned outwards to increase base width.
A mobile scaffold must be used only on a firm level surface. Where the surface
has a slight cross-fall, the level of the wheels must be adjusted to bring the
scaffold back to plumb. Mobile scaffolds should not be used closer than 1 m to
any slab edge or partition unless the edge is protected to prevent the wheels
and scaffold from falling.
Access between working platform and base must be provided by means of
securely fixed ladders or purpose-built rungs. Cross braces must not be used
as a means of access. Work platforms must be fully decked and be provided
with guardrails and toeboards in accordance with general requirements for
scaffolding.
Base

The force necessary to move a mobile scaffold must be applied near or as
close to the base as practicable and provision must be made to stabilise the
tower during movement from one location to another.
Do not ride on on a manually-propelled scaffold while it is being moved.
Persons must not ride on mechanically propelled scaffolds unless the
following conditions are satisfied:
(a) Operating controls for movement of the scaffold must be located on
the working platform.
(b) The ground surface must be level, smooth and free from pits, holes or
obstructions.
(c) An effective braking system must be provided to prevent movement
while in use.
(d) A warning or alarm system must be available to alert workers of each
movement in advance.
(e) Toeboards must be provided to the working platform to prevent tools
and materials from falling off.
(f) As a safety precaution, workers should be provided with a safety
harness when the scaffold is in motion; and
(g) The rate of movement must not exceed 1.5 km per hour (a very slow
walking pace).
(h) The scaffold must be purpose-designed to allow movement with
persons on it.
7.3 TRESTLES AND TRIPODS
7.3.1 DEFINITION
A trestle is a self-supporting metal or timber stand incorporating one or more
horizontal members on which a working platform may be laid. Steel trestles
are often telescopic, and of the folding type.
A tripod is a three-legged stand for supporting one end of a horizontal beam
on which a working platform may be laid.
7.3.2 SPECIFIC REQUIREMENTS
The design and construction of steel trestles must be to a recognised standard
such as AS/NZS 1576, Part 5.
Working height is normally restricted to a platform height not greater than 3 m
because of the difficulty of fixing guardrails.
Loading of a working platform is restricted to light-duty (160 kg). Each support
must also be capable of supporting a vertical load of 160 kg (1570 N) placed in
any position over a 225 mm length of any cross member.
The ratio of height of trestle to spread of legs must not exceed 3 unless the
special requirements set out in 7.1.3 are complied with.
The maximum span of scaffold planks used on trestles is 2.4 m.

8. SUSPENDED
SCAFFOLDS
8.1 SCOPE
This part deals with suspended scaffolds, which are working platforms that:
(a) Are suspended by ropes from overhead outriggers, parapet hooks or
brackets fixed to a building or structure; and
(b) Are capable of being raised and lowered by hand haulage on fibre
ropes, or by hoists that are either manually or mechanically operated.
NOTE: A platform held by ropes or special hangers in a set position as a
“hanging scaffold” is not a suspended scaffold but is classified as a special
scaffold.
8.2 TYPES OF SUSPENDED SCAFFOLDS
The more usual suspended scaffolds are:
(a) Swinging stage (manual): This has two points of overhead
suspension and is raised or lowered by hand haulage on rope falls.
(b) Swinging stage (mechanical): This has two points of overhead
suspension and is raised or lowered by power-operated hoists
controlled on the stage.
(c) Boatswain’s chair (manual): This has a single overhead suspension
and is self-raised or lowered by hand haulage on rope falls.
(d) Suspended safety chair (mechanical): This has a single overhead
suspension and is raised or lowered by a power-operated hoist
controlled on the platform.
(e) Multi-point suspended platforms: These are platforms that have
more than two points of overhead suspension, with power- or
manually-operated hoists.
NOTE: A boatswain’s chair and swinging stage (manual) must be raised or
lowered from the platform unless otherwise approved by the inspector.
8.3.1 HAND HAULAGE
Fibre rope tackle used for hand haulage consists of not less than four parts of

18 mm diameter natural fibre rope (to give a good hand grip) reeved through
double and single sheaves, with separate tackle for each support position.
Fibre rope must have a factor of safety of at least 6, when new. Any rope
which is in a doubtful condition must be replaced. Chemicals, detergents,
solutions injurious to the rope fibre, sand-blasting, burning off, or the use of
an open flame may prohibit the use of fibre ropes on scaffolds unless special
precautions are taken.
Blocks for fibre rope must be of metal, or of wood strapped with metal, and
must be not less than 100 mm in diameter (trade measurement accepted).
Strapping on wooden blocks must extend from the top of the block down
both sides and brought together for the Beckett attachment. The bottom of the
groove should be rounded and wide enough so the rope fits loosely in it. The
bottom blocks to which a stage is fastened should each have a large deep
swivel hook so that the downhaul part of the tackle can be fastened to it with
a suitable hitch. Otherwise, alternative means must be provided on the stage
or chair for securing the downhaul part.
8.3.2 MECHANICAL OPERATION
Electric and air-operated hoists, including cable climbing devices, must be
controlled from the stage platform. They must have a pushbutton or “dead-man”
lever control that will stop and automatically lock the motor and hoist
when pressure on the control switch or lever is removed. Hand-operated
release to allow a faster descent than normal is not permitted. Each control
must be individually operated. On no account must controls be tied or
otherwise fixed in position. Ratchet and pawl manually-operated hoists must
have a positive locking device so arranged that the stage may be securely held
at any level and that the pawl automatically engages when released from hand
control.
Wire ropes must be of suitable quality and of adequate strength and length.
The factor of safety for new wire rope must be not less than 10. Wires must
feed on to drums evenly and there must be sufficient space for all wire to be
accommodated on the drum below the flanges.
8.3.3 ANCHORAGES
Hoisting wires or tackle must be anchored to a secure part of the structure, to
outriggers, to specially designed brackets and parapet hooks, or directly to
counterweights.
All structures, parapets, and other supports must be of such condition and
design to support the anchorage without danger of failure or distortion and to
give a factor of safety of at least 3 under the worst conditions. The employer
may be required to supply a registered engineer’s report on the suitability of
the structure, parapet or support.

8.3.4 OUTRIGGERS (NEEDLES)
Design: It is sound and accepted engineering practice to use either steel or
aluminium outriggers to support mechanical powered swinging stages. For
hand haulage, swinging stages and boatswain’s chairs, either metal or timber
outriggers may be used. The structural design used for outriggers must be
based on and conform to the appropriate New Zealand Standard.
(a) For a swinging stage with two points of suspension, each outrigger
must be designed to carry half the dead load of the working platform
including hoists, etc. together with the full live load due to persons
and materials as these loads are capable of being positioned at either
end of the stage (see example in Appendix B2).
(b) For a swinging stage with more than two points of suspension, each
interior outrigger must be capable of carrying the full dead and live
load for each section between suspension points.
Unless specifically designed by a registered engineer, each outrigger for a
mechanically-operated swinging stage must be:
(a) At least equivalent in strength to a 152 mm x 89 mm x 17.09 kg/m
rolled steel joist when suspending a maximum load of 400 kg.
(b) At least 3.6 m in length when counterweighted.
(c) Located so as not to project more than 1.5 m beyond the outer point of
support on the building or structure.
The load exerted by an outrigger on a roof structure or parapet must be
distributed by providing adequate packing at its points of support, i.e. at the
outer or fulcrum end, and the inner or counterweighted end.
Stability and Counterweighting: Outriggers must be either counterweighted
or secured to the building or roof structure by bolts or other structural fixing.
Where an outrigger is stabilised by counterweights, the factor of safety against
overturning must be at least 3 (see Appendix B for a method of calculating
counterweights required).
Where roof fixings are relied upon as the sole means of achieving stability,
they must be capable of providing a factor of safety of 3 against uplift.
Roof fixings shall be designed according to the stresses appropriate to the
material. No component in the system must be loaded to more than the
manufacturer’s recommendation.
Outriggers must be prevented from rolling over or moving laterally due to the
end movement of the stage. Where counterweights are used to provide
stability, they must be firmly attached to the outriggers by mechanical means
so that they cannot become accidentally dislodged due to any work or weather
condition.
When strops are used, these must be positively secured to the outriggers
which must be provided with stop ends. Shackles must be moused.
Where counterweights are to be used behind parapets, etc. for direct securing
to the top block strop, there must be sufficient weight to prevent movement
when the stage or chair is subjected to shock-test loading. The weights should
be positively secured one to another and to the strop and should be of a
suitable size in relation to the parapet.

Counterweights must be stamped or marked with their weight, be of a size to
be readily handled, be fitted with means to positively secure them on to
another, be of uniform size, regular shape, and of a heavy material. Sand and
water may not be used.
8.3.5 BRACKETS AND PARAPET HOOKS
Brackets, parapet hooks and attachments must be designed by a registered
engineer. A minimum factor of safety of 3 is required on the combined dead
and live loading of the scaffold. All welding for these structural components
must be done by a certificated welder.
Parapet hooks and brackets may be used only if:
(a) The parapet is structurally sound;
(b) The hook fits the parapet snugly, and is so positioned that it cannot be
dislodged; and
(c) The parapet is deep enough to allow at least 300 mm of hook down
the inside.
8.3.6 WORKING PLATFORMS, GUARDRAILS, MIDRAILS AND
TOEBOARDS
Platforms may be of any acceptable material provided that they are strong
enough for the purpose, and are designed, constructed and assembled
according to sound and accepted engineering practice.
Guardrails and midrails must be provided on both sides and both ends of
swinging stages where workers can stand, and on the outside and both ends
of other suspended scaffolds.
Toeboards must be provided on all types of suspended scaffolds which carry
tools and materials, with the exception of boatswain’s chairs. Midrails may be
omitted if the toeboards are of a minimum height of 225 mm.
The platform, toeboard, midrail and guardrail must be securely fixed together
to form a complete unit.
8.3.7 SAFETY HARNESSES AND LIFELINES
This section applies to all suspended working platforms.
Every worker on a suspended working platform must wear a safety harness
that is secured to a fixed support or to an independent lifeline except:
(a) Where the platform is a boatswain’s chair that has more than one
effective means of support; or
(b) Where the platform is so designed and constructed that it would
remain safely suspended notwithstanding the failure of one rope or
suspension, in which case the harness may be secured to the platform.
A safety harness worn by a worker must, if the worker falls from the platform,
suspend the worker not more than 1.5 m below the platform and must be so
designed that the force arresting the fall does not exceed 8 kN.

a
a
aOutrigger needle
a
aaaaA lifeline must be used by only one worker at a time, and must either extend
to the ground or be provided with a positive stop to prevent the harness
running off the end of the line. The line must have a minimum breaking
strength of 29.4 kN and be of nylon at least 12 mm in diameter; or of
polypropylene or other equally durable material at least 16 mm in diameter.
Where a platform has only one rope at each support, the harness lanyard must
be attached by a gravity lock device to an independent lifeline.
The independent lifeline may be fixed:
(a) directly to an anchor set in the building that will withstand a vertical
load of 24 kN;
(b) to a separate anchorage on the same outrigger (needle) supporting the
platform provided that:
(i) The distance along the cantilever section (from its support to the
anchorage) is not more than 1/3 of the total cantilever length;
(ii) The counterweight, if used, is mechanically attached to the
outrigger; and
(iii) The outrigger is secure against sliding.
Where a platform has two independent ropes at each suspension, the
operator’s safety belt lanyard may be attached to a suitable anchorage on the
platform.
The two ropes used at each support of the platform may be attached to the
same outrigger by separate anchorages, provided the outrigger is made of
structural steel. For example, three lugs supporting a common pin is
considered to provide two separate anchorages if one rope only is set between
each pair of lugs.
Extra rope Winch rope
Fig. 19 Anchorage for ropes.
8.3.8 ANTI-TILT SWITCH DEVICES
All suspended working platforms must be fitted with tilt switches which cut off
the motors in the event of the platform becoming more than 10° out of level.
8.3.9 ACCESS, WARNING NOTICES AND PROTECTION OF THE
PUBLIC
Wherever reasonable and practicable, provision must be made at intermediate
working levels for access to the working platform for workers and materials.

Where suspended scaffolds are above thoroughfares, adequate and prominent
warning notices must be displayed. In addition, if any special danger exists,
adequate protection of the public must be provided. The accumulation of
surplus gear or materials on any suspended scaffold is hazardous and must be
avoided.
8.3.10 ERECTION, ALTERATION AND DISMANTLING
Suspended scaffolds of any kind or height may be erected, altered or
dismantled only under the direct supervision of a person who holds a
certificate of competency for that kind of scaffold.
8.4 SPECIFIC REQUIREMENTS
8.4.1 SWINGING STAGE (HAND HOIST OR MANUAL)
The maximum live load permitted on a swinging stage (hand hoist) is the
difference between 360 kg and the dead weight of the stage (including the
weight of falls and blocks).
The decking, toeboards, midrails and guardrails must be fixed together to form
a complete unit.
The relation of width of platform, height of point of suspension on the hanger,
the weight of stage must be such that, under a load of 160 kg in the extreme
position on any side, the cross tilt of the platform is not more than 1 in 6 of
platform width, the width of platform being not less than 450 mm. (Generally
it will be found that for a normal timber stage 450 mm wide, the eye of the
hanger should be not less than 1.15 m above the deck; a wider platform will
need a greater height.)
To prevent end tilt, the overhang of any end beyond the point of support must
be such as to ensure that the platform is stable under a load of 160 kg at the
extreme end.
The length of stage depends on the method and materials of construction, the
positions of overhead support, and on the total dead weight of the stage. This
must not be over 120 kg for use by three workers, and not over 200 kg for two
workers.
8.4.2 SWINGING STAGE (MECHANICAL)
The maximum level load permitted on the swinging stage is the difference
between 560 kg and the dead weight of the stage including the weight of the
hoisting gear or cable climbers.
No more than three persons may use a stage at any one time. The safe
working load for the section or length of stage in use must also be less than
the safe lifting capacity of the hoisting gear, and must be clearly marked on the
stage at all times while it is being used. The platform, decking and guardrails
must comply with the requirements specified in 8.4.1. Where the stage is
constructed in sections, a positive method of connection must be used, such as

through bolts, fishplates or other devices which cannot be dislodged. Overload
cut-out devices must be used and must be kept so adjusted as to provide
adequate safeguard should snags be encountered due to a projection or other
restraint.
8.4.3 BOATSWAIN’S CHAIR (HAND HOIST OR MANUAL)
The total live load on a boatswain’s chair must not exceed 115 kg.
When used by a worker in a sitting position, the chair must have a back rail or
rope, and also a front rail, rope, or post not less than 250 mm above the seat.
A chair or platform entirely supported by fibre ropes must have rope slings not
less than 12 mm diameter passing through cleats crossed underneath and
adequately spliced together.
8.4.4 SUSPENDED SAFETY CHAIR (MECHANICAL)
The live load depends on the safe lifting capacity of the hoisting gear, and
must be limited to 160 kg or a maximum of two persons.
The safe working load must be legibly and permanently marked on the stage.
The initial safe working load of the stage must not be reduced by replacing
with inferior wire (rope must be fully accommodated between the drum
flanges).
8.4.5 MULTI-POINTS SUSPENDED PLATFORMS
Whenever practicable, the live load should be limited to 240 kg (i.e. a
maximum of three persons or a maximum of two persons and materials) per
section of platform between suspension points.
The safe working load, including the maximum number of persons per
section, must be legibly and permanently marked on the platform.
The platform must be strapped together from end to end and must be flexible
enough to react without damage to moderate inequalities in level of points of
support during moving operations. The width of platform must be not less
than 675 mm. The platform must be held to avoid sway away from the work
while in use.
Safe means of access and egress to the platform must be provided while it is in
use by workers.
No worker is permitted to work or ride on the platform while it is being raised
or lowered unless the controls on the platform are individually operated.
Workers may work on the platform if the controls are elsewhere, provided that
the hoisting mechanism is effectively locked or the platform is independently
supported in the working position.
8.5 ENGINEER’S CERTIFICATE
A registered engineer’s design certificate for working loads in excess of the live
loads specified for the various types of suspended scaffolds may be required
by an inspector.

9. SPECIAL
SCAFFOLDS
9. I SCOPE
Special scaffolds are scaffolds which do not meet the standard requirements for
standing or suspended scaffolds, and include:
(a) Non-standard standing scaffolds;
(b) Standing scaffolds with attachments;
(c) Cantilever scaffolds; and
(d) Hanging scaffolds.
9.2 DESIGN AND SUPERVISION
All special scaffolds must be designed in accordance with sound engineering
practice, and must be erected, altered or dismantled only under the direct
supervision of a certificated scaffolder who has an appropriate certificate. An
inspector may require a registered engineer’s certificate, certifying the
adequacy of the design.
9.3 NON-STANDARD STANDING SCAFFOLD
A standing scaffold becomes a special scaffold when it differs from the
standard in respect of any of the following:
(a) Height exceeds 33 metres;
(b) Maximum bay length exceeds 2.4 metres;
(c) Width exceeds 1.5 metres; or
(d) Loading exceeds the heavy-duty load described in this code.
9.4 STANDING SCAFFOLDS WITH ATTACHMENTS
Attachments include:
(a) Cantilevered loading platforms, which are cantilevered structures
erected from the main scaffold to serve as loading bays.
(b) Protective screens which are fixed to the main scaffold to intercept
anything which may fall from the structure.

9.5 CANTILEVER SCAFFOLDS
A cantilever scaffold is an independent tied standing scaffold constructed in
accordance with this code but erected on beams cantilevering out from a
building. It is used where it is impossible or undesirable to found the scaffold
on the ground (fig. 20).
Bracing
Inverted
forkheads
Positive ties to floors
RSJ or RHS section
Packs to position reaction
Box tie and brace
for stability
Tie bolts through floor when required
Fig. 20 Typical cantilever scaffold.
9.6 HANGING SCAFFOLDS
Hanging scaffolds are platforms suspended by tubes, bolts, fixed-rope slings,
or other methods and not intended for raising or lowering while in use.
Any suspension point, member or attachment must be specially designed and
formed in such a way that it cannot become dislodged or displaced by
movement of the hanging scaffold.
The designer must be satisfied that the suspension points are strong enough to
support the load and have a factor of safety of 3.
If the hangers are scaffold tubes, they must be assembled using right-angle
couplers, doubled up at the suspension points. Sleeve couplers or joint pins
must not be used for vertical axial joints.
Check clips must be fitted not only to the top of the hanger, but also below
the bottom ledger. Clips must also be fitted in such a direction that in the
event of the bolt failure, or if it is accidentally knocked open, the clip will still
hold.
Wire rope used for slinging must have a factor of safety of 5 and be fixed to
the suspension point and the scaffold by two round turns and 3 bulldog grips
for wire up to 19 mm in diameter, or by using an eye and a shackle capable of
safely carrying the loads. The shackle should be moused.
All lifting gear and means of suspension must be thoroughly inspected before
and after it is installed and at regular intervals during use.
Because of the risk involved while erecting or dismantling hangers, workers
must wear safety harnesses, secured to independent lifelines as specified in
8.3.7; or work from a machine-lifted platform.

APPENDIX A: SCAFFOLD
REGISTER FOR ALL
SCAFFOLDING FROM WHICH
A PERSON COULD FALL
5 M OR MORE
(1) A scaffold register must be kept on site and be available for inspection, for
all scaffolding from which a person could fall 5m or more.
(2) When complete, the scaffold register should record:
(a) Project name, address, or other clear identification.
(b) The location of the scaffold with respect to site coordinates or the
location at the building or structure, so that the scaffolding can be
clearly located.
(c) Miscellaneous details of the scaffold, (see sample scaffold register over
page).
(d) A record of each inspection carried out.
(3) The inspections must be carried out at the following intervals:
(a) Before the scaffold is first put to into use.
(b) Weekly while the scaffold is in use.
(c) After each structural alteration or addition.
(d) Monthly while the scaffold is set up but not in use.
(e) After any storm or occurrence that could adversely affect the safety of
the scaffold.
(4) The inspection must be carried out by either:
(a) A certificated scaffolder of the appropriate class; or
(b) A competent person such as a registered engineer.
(5) The entries of each inspection in the scaffold register must be made and
signed by the person who carried out the inspection.

SCAFFOLD REGISTER
The following information should be provided in the register (see sample over
page:
Project name:
Address:
Main contractor (Name, address, contact name):
Location (Specify building grids etc):
Reason for scaffold (i.e. erect cladding, erect rainwater disposal system, etc)
Scaffold subcontractor (Name, address, contact name, phone number):
Subcontractors who are to use the scaffold (e.g. plumber, wall cladder,
painter):
Overall dimensions (Length, height, width, etc.):
Number of working platforms:
Duty of scaffold (Light, medium, heavy, special, etc.):
Limitations (if any):
Other comments:
INSPECTION RECORD
(a) Before first use (date, inspector, signed off).
(b) Regular inspections (date, inspector, signed off).
(c) After modification (date, inspector, signed off).
(d) After storm or potentially damaging incident (date, inspector, signed
off).

SAMPLE SCAFFOLD REGISTER
Project Name: Location:
Address:
Main Contractor: Contact:
Reason for Scaffold:
Scaffold Erector: Phone:
Subcontractors to use Scaffold:
Height: Length: No of Platforms:
Duty: Limitations:
Comments:
INSPECTION RECORD
Date: Name of Inspector: Signature: Comments:

APPENDIX B: SUSPENDED
SCAFFOLD REGISTER AND
NOTES ON SUSPENDED
SCAFFOLDING
(1) A suspended scaffold register must be kept on site and be available for
inspection, for all suspended scaffolding, boatswain’s chairs, swinging stages,
etc.
(2) When complete, the suspended scaffold register should record:
(a) Project name, address, or other clear identification;
(b) The location of the scaffold with respect to site coordinates or the
location at the building or structure, so that the scaffolding can be
clearly located;
(c) Miscellaneous details of the scaffold, (see sample suspended scaffold
register);
(d) A record of each inspection carried out.
(3) The inspections must be carried out at the following intervals:
(a) Before the scaffold is first used;
(b) On each day while the scaffold is in use;
(c) After each structural alteration or change to the nature of the
anchorage;
(d) Monthly while the scaffold is set up but not in use;
(e) After any storm or occurrence that could adversely affect the safety of
the suspended scaffold.
(4) The inspection must be carried out by either:
(a) A certificated scaffolder of the appropriate class (e.g. suspended
scaffold); or
(b) A competent person such as a registered engineer.
(5) The entries of each inspection in the suspended scaffold register must be
made and signed by the person who carried out the inspection.

LIVE LOAD (I.E. PERSONS, TOOLS, MATERIALS)
Unless designed by a competent person such as a registered engineer, the
following limitations apply:
(a) For a swinging stage raised by hand haulage on fibre ropes, the
maximum live load is the difference between 360 kg and the dead
weight of the stage including falls and blocks, with the maximum
number of persons not exceeding three.
(b) For a swinging stage operated mechanically with two points of overhead
suspension, the maximum live load is the difference between 560 kg and
the dead weight of the stage including hoisting gear, with the maximum
number of persons not exceeding three.
(c) For a boatswain’s chair, the maximum live load is 115 kg.
(d) For a suspended chair operated mechanically with single supports, the
maximum live load is limited to 160 kg or a maximum of two persons.
(e) For multi-point suspended platforms, the maximum live load is limited to
240 kg or a maximum of three persons per section of platform between
suspension points.
COUNTERWEIGHTING OF OUTRIGGERS
Where an outrigger is stabilised by counterweights, the factor of safety against
overturning must be at least 3. To determine the counterweight required, the
table below may be used; alternatively the counterweight may be calculated (see
also 8.3.3) using the formula below. (See figure 21.)
Total length
Tail length Overhang
Fulcrum point
Counterweight
Total suspended load
Fig. 21 Counterweighting of outriggers.

3.6
193
240
290
343
400
4.0
171
212
255
300
348
400
4.4
154
189
227
267
309
353
400
4.8
140
171
205
240
277
316
357
400
5.2
133
157
187
218
251
286
322
360
400
COUNTERWEIGHT DETERMINED USING THE FORMULA
(Note: for a uniform two-outrigger suspended scaffold, the suspended load on
one outrigger is assumed to be half the dead load plus the full live load.)
The righting moment is the tail length times the counterweight.
The overturning moment is the overhang times the suspended load.
At equilibrium, the righting moment equals the overturning moment. For
safety the overturning moment is multiplied by the safety factor, increasing the
required counterweight.
Counterweight = overhang (in m) times the suspended load times three
tail length (in m)
e.g. if the suspended load is 360kg, the overhang is 1.2m and the tail length is
4.1m, then the counterweight required is:
1.2m x 360 kg x 3 counterweight
4. l m
= 316kg
SUSPENDED SCAFFOLD REGISTER
The following information should be provided in the register (see example
over page):
Main contractor or client (address, contact name):
Location (specify building grids etc):
Reason for scaffold (i.e. erect cladding, erect rainwater disposal
system, etc):
Scaffold subcontractor (name address, contact name, phone number):
Subcontractors who are to use the scaffold (e.g. plumber, wall cladder,
painter):
Live load and/or number of persons:
Limitations (if any):
Other comments:
Overhang
(mm)
500
600
700
800
900
1000
1100
1200
1300
1400
1500
5.6
144
171
200
230
261
293
327
363
400
Counterweight
required (kg)
Total Length (m)
6.0
133
158
185
212
240
269
300
332
365
400

SAMPLE SUSPENDED SCAFFOLD REGISTER
Main Contractor: Contact:
Reason for Scaffold:
Scaffold Erector: Phone:
Subcontractors to use Scaffold:
Live Load: Overhang Length: Total Length:
Counterweight: Limitations:
Comments:
INSPECTION RECORD
Date: Name of Inspector: Signature: Comments:

APPENDIX C: WEIGHTS OF
MATERIALS USED ON
SCAFFOLDING
(AS PLACED ON WORKING PLATFORMS — GUIDE ONLY)
Asbestos cement, corrugated super six 13.5 kg/m2
Asbestos cement, plain sheets 4.5 mm 8.0 kg/m2
6.0 mm 10.5 kg/m2
9.0 mm 16.0 kg/m2
Bricks dry (225 x 108 x 73 mm) 3.0 kg per brick
Bricks wet 3.5 kg per brick
Cement (at 25 bags to the tonne) 40.0 kg per bag
Cement Bulk 1500.0 kg/m3
Concrete blocks
400 x 200 x 200 mm hollow 19 kg per block approx
400 x 200 x 100 mm solid 16 kg per block approx
Concrete ready mixed — wet 2550 kg/m3
Concrete in wheelbarrow (approx. 0.05 m3 136 kg
Total load of man and wheelbarrow 220 kg
Corrugated galv. iron
24 gauge 4.5 kg per m2
26 gauge 3. 5 kg per m2
Ropes
Fibre 18 mm diam. dry 25 kg per 100 m
Fibre 18 mm diam. wet 30 kg per 100 m
Wire 8 mm diam 26 kg per 100 m

Sand dry 1680 kg per m3
Sand wet 1920 kg per m3
Scaffold planks (timber) 250 mm x 50 mm x
2.7 m (aver.) 19 kg
Steel Rods
6.5 mm diam 25 kg per 100 m
10 mm diam 67 kg per 100 m
Tube Steel (48.3 m) and fittings
Tube 48.3 mm x 4 mm x 6 m length 27.0 kg
Tube 48.3 mm x 4.5 mm x 6 m length 28.5 kg
Fittings range 1 kg to 2 kg (average) 1.5 kg
100 m tube + 20 fittings ) approx. total
weight) 495.0 kg
Tube Aluminium (48.3 mm) and fittings
Tube 48.3 mm x 4.5 mm x 6 m length 10.0 kg
Fittings 1 kg to 2 kg each (average) 1.5 kg
100 m tube + 20 fittings (approx. total
weight) 195.0 kg
Tube Frame steel braced portal 22-32 kg
Timber
Pinus, firs, and light timber per m3 400 to 480 kg
Rimu, and medium weight per m3 480 to 640 kg
Heavy timber per m3 640 to 800 kg
Water per litre 1.0 kg
Worker (average) 80.0 kg

APPENDIX D: SCAFFOLDING
MATERIALS TECHNICAL DATA
Table D1: Dimensions and Properties of Scaffold Tubes
Dimension Steel tubes to Galvanised Aluminium tubes
and BS 1139 or steel tube to to BS 1139
properties AS 1576.3 BS 6323 or AS 1576.3
1. Outside 48.3 (+ 0.5 tolerance) 48.3 (+ 0.5 tolerance) 48.3 (+ 0.5 tolerance)
diameter (mm)
2. Thickness (mm)
(a) seamless 4.0 (+ 0.5 tolerance 3.2 (+ 0.48 tolerance) 4.47 (+ 0.56 tolerance)
(b) welded 4.0 (+ 0.8; - 0.4 3.2 (+ 0.32 tolerance)
tolerance)
3. Mass per linear 4.37 kg/m 3.56 kg/m 1.67 kg/m
metre
4. Minimum tensile 340 MPa 360 MPa 295 MPa
strength
5. Yield strength 210 MPa 215 MPa 255 MPa
6. Radius of gyration 15.7 mm 16.0 mm 15.6 mm
7. Cross-sectional area 557 mm2 453 mm2 615 mm2
8. Moment of inertia 138,000 mm4 116,000 mm 4 149,000 mm4
9. Elastic modulus 5700 mm3 4800 mm3 6180 mm3
Table D2: Safe Working Loads for Couplers and Fittings to
BS 1139 or AS 1576.2
Description of coupler and fitting Type of loading Safe working load
1. Right-angle couplers Slip along tube 6.25 kN (640 kg)
2. Swivel couplers Slip along tube 6.25 kN (640 kg)
3. Joint pins (expanding spigot couplers) Shear strength 21 kN (2140 kg)
4. Sleeve couplers Tension 3.1 kN (315 kg)
5. Adjustable base plate Axial 30 kN (3058 kg)

Table D3: Safe Working Loads for Ties and Galvanised Wires
Description Safe working load
1. Tie — double 3.15 mm 'black' wire, twisted 1.57 kN (160 kg)
2. Galvanised wire — for fixing gin wheel, block, guy, or light
loads; using not less than two round turns on 48.3 mm tube
or timber:
(a) 8 gauge wire — 2 round turns 1.57 kN (160 kg)
(b) 8 gauge wire — 3 round turns 2.45 kN (250 kg)
(c) 8 gauge wire — 4 or more turns 2.94 kN (300 kg)
(d) 10 gauge wire — 2 round turns 1.18 kN (120 kg)
(e) 10 gauge wire — 3 round turns 1.57 kN (160 kg)
(f) 10 Gauge wire — 4 or more turns 1.96 kN (200 kg)
Note: The above strength values are a guide for good-quality materials under
average conditions of use on construction work. Where special materials of
known quality and of established strength are used, the safe working loads
may be varied in accordance with accepted engineering practice.

APPENDIX E: RIGGING
FOR SCAFFOLDERS
GENERAL
Scaffolders need to know how to tie knots that may be used to erect, alter or
dismantle scaffolds and the rigging of crane-lifted loads of scaffolding. This
appendix is limited to rigging for scaffolders.
SUSPENDED LOADS
Hooks that anchor ropes or pulleys on suspended scaffolds must be moused to
prevent accidental unhooking. Shackles used in scaffolding shall have their
SWL clearly marked and when in use the pin shall be securely screwed in and
moused to the D.
Fig. 23 D Ring.
When using a shackle to form a running noose always fit the back of the D to
the standing or running part of the rope.
This practice ensures that the shackle pin is not either overtightened or
unscrewed.

SCAFFOLD TUBE
When using a fibre rope to lift or lower a scaffold tube always use a stopper or
rolling hitch.
Because the hitch tightens as the weight is taken, always position it to one
end, ensuring that the direction of pull is as shown in fig. 23.
Used for gripping a larger
rope, etc. Secure hauling
rope with three or more
turns as shown and then
half hitch (or more) to
secure free end. Pull must
be in direction shown.
Fig. 23 Stopper or rolling hitch.
Fig. 24 Rigging crane-lifted bundle of tubes.

When rigging crane-lifted bundles of tube, always use two adequate-strength
similar choker-reeved slings. Position the slings approximately one third in
from each end and land the bundle on dunnage to prevent damage to the
slings or tubes when they are withdrawn. Always use SWL marked shackles, of
adequate capacity, to form choker slings.
Note: The included angle between two slings affects the slings’ SWL. To
calculate the SWL of two slings rigged as shown in fig. 24, multiply the SWL of
one sling by 1.4. As an illustration, two slings each with an SWL of 2 tonnes
and reeved as shown could safely lift 2.8 tonnes. (2 x 1.4 = 2.8).
Right
6d 6d
Wrong
ROPE JOINS OR EYES
Where wire rope grips have been fitted by a qualified person, such as a crane
maintenance fitter rigger, they may be used for lifting. If fitted by others, it
should not be used for lifting purposes.
Wire rope grips must be correctly applied in order that the stresses within the
terminal are evenly distributed.
Always fit the grips the same way round, with the bridge on the loaded or
long part of the rope and the U-bolt on the short part.
On any wire rope a minimum of three grips must be used and spaced at a
distance, centre to centre of grips, of six rope diameters (see fig. 25). The
numbers of wire rope grips required are:
(a) Up to and including 19 mm (3/4 in.) rope: 3 grips.
(b) Over 19 mm and up to and including 32 mm (11/4 in.) rope: 4 grips.
(c) Over 32 mm and up to and including 38 mm (l/2 in.) rope: 5 grips.
(d) Over 38 mm and up to and including 44 mm (13/4 in.) rope: 6 grips.
(e) Over 44 mm and up to and including 56 mm (21/4 in.) rope: 7 grips.
When joining fibre ropes, always use a double sheet bend or a carrick bend
knot. Never use a reef knot to join ropes.
Fig. 25 Joining wire ropes.

CHECKLIST
The following represents some of the items used in rigging that should be
regularly checked for safety:
(a) Fibre rope: Cuts, flaking, decay or contamination by injurious
substances.
(b) Wire rope (including slings): Broken strands (not more than 6 broken
strands in any 10 diameter length), worn strands, corrosion, sharp
bends or overstressing.
(c) Fittings:
(i) Shackles: Bent, worn, cracked, SWL not shown.
(ii) Rope grips: Correct size, nuts tight, worn or bent.
(iii) Rope splices: Mechanical splice (Talurit) — SWL shown,
worn or deformed, manual splice — spragged ends, tucks
unlaying or not locked.

APPENDIX F:
PERFORMANCE
REQUIREMENTS FOR
SCAFFOLD PLANKS
The following is a reprint of NZS 3620: 1985 Specification for scaffold planks.
101 SCOPE
101.1 This Standard specifies the minimum requirements for scaffold plans.
101.2 This Standard does not preclude the use of materials other than those in Parts
2 to 5, provided that it can be established that they meet these requirements
and comply with relevant NZ Standards or equivalent.
I01.3 Planks that comply in all respects with a means of compliance set out in Parts
2 to 5 shall be deemed to satisfy the requirements of this Standard.
102 INTERPRETATION
In this Standard the word “shall” indicates a requirement that is to be adopted
in order to comply with the Standard; the word “should” indicates a
recommended practice.
103 DEFINITION
For the purpose of this Standard the following definition shall apply:
Scaffold plank: A plank that is intended to provide part of the support surface
of any structure, framework or suspended scaffold of a temporary nature that
is used to support workmen and materials.
104 DIMENSIONS
l04.l The minimum width of scaffold planks shall be 225 mm.
Note: For timber scaffold planks, the moisture content appropriate to the
minimum width dimension shall be 16 + 2%.

105 IN-SERVICE STRENGTH REQUIREMENTS
A scaffold plank shall be capable of sustaining a total working load of 1.60 kN
applied to the full-width of the plank as two equal loads 300 mm on either
side of the centre of the span when it is simply supported at 2.4 m centres.
106 QUALITY CONTROL
Planks shall be subjected to quality control inspection and testing procedures
at the time of manufacture or selection, as set out in the appropriate sections
of Parts 2 to 5, Means of Compliance.
107 BRANDING
107.1 Planks shall be permanently branded on an edge, the brand reading NZS 3620.
107.2 Marking for ownership is permitted providing it does not detract from safety
when the plank is in use.
107.3 Planks manufactured under the Standard Certification Mark Scheme shall be
branded on an edge with the manufacturer’s licence number.
Note: The Standard Certification Mark Scheme
As this Standard covers product safety, manufacturers are advised to apply for
a licence to use the Standard Certification Mark.
Shown here is the Certification Mark of the Standards Association of New
Zealand. This Mark may be used only by those manufacturers licensed by the
Standards Association and must be accompanied by the number of the relevant
New Zealand Standard and the number of the authorising licence. The
presence of this Mark on or in relation to a product is an assurance that the
goods are manufactured under a system of supervision, control, and testing,
(including periodical inspection of the manufacturer’s works by SANZ)
designed to ensure compliance with the Standard.
NZS 3620
Licence No.............
For further particulars apply to the Director, Standards New Zealand, Private
Bag, Wellington.

108 MATERIALS
108.1 Timber planks
108.1.1 The species, grade, size and finish, preservative treatment, moisture content,
methods of manufacture, and other relevant characteristics of timber shall be
suitable for their end use.
108.1.2 Both faces of a timber scaffold plank shall be sawn finished or roughened to a
similar finish.
108.2 Other materials
108.2.1 Planks shall have non-skid working surfaces to ensure safe working
conditions.
108.2.2 Methods of manufacture, size, finish, resistance to corrosion and other relevant
characteristics shall be suitable for their end use.
109 MEANS OF COMPLIANCE
109.1 For the purposes of this Standard, Parts 2 to 5 provide a means of compliance
with Part 1 for scaffold planks made of solid and glue-laminated timber, steel,
and aluminium.

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