One way slab load calculation
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The document summarizes the load distribution calculation for a one-way slab. It provides the given data for the slab, beam, and column dimensions. It then calculates the dead and live loads on the slab based on the self-weight and imposed live loads. The loads are then calculated as they are distributed from the slab to the beams, from the beams to the columns, and finally from the columns to the footing. Equations and diagrams are provided at each step to demonstrate how the loads are calculated and distributed throughout the one-way slab structural system.
One way slab load calculation
- 1. LOAD DISTRIBUTION CALCULATION BY ONE WAY SLAB PREPARED BY R. Udhayasankar ME Assistant Professor Department of Civil Engineering YouTube channel link : https://www.youtube.com/channel/UC8RHrVHopF-W8Og5Pt9h-0Q
- 2. • GIVEN DATA • Lx = 3 m • Ly = 7 m • Slab thickness = 120 mm • Column C1 = 230 x 400 mm • Beam B1 = 230 x 380 mm • Beam B2 = 230 x230 mm • Live load = 2 kN/m2 • M20 Fe 415
- 4. 7 m 3 m 1.5 m 1.5 m Yield line pattern for one way slab S1 C1 C1 C1 C1 SB1SB1 B1 B1 7 m 3m One way slab
- 5. • SLAB LOAD CALCULATION • Self weight of slab = 7 x 1.5 x.12 (Depth of slab = .12) = 1.26 x25 ( unit weight of concrete = 25) = 31.5 = 31.5/7 = 4.5 kN/m DEAD LOAD = 4.5 kN/m • LIVE LOAD CALCULATION = 7 X 1.5 = 10.5 = 10.5 X 2 = 21 kN/m2 ( live load = 2) = 21/7 = 3 kN/m LIVE LOAD = 3 kN/m 7 m 1.5 m 7 m 3kN/m4.5 kN/m
- 6. • BEAM LOAD CALCULATION Total load on slab to beam D.L + L.L = 31.5 + 21 = 52.5 kN/m Self load on beam Clear span = 6.6 m ( 7-.4) = 6.6 m (.4 Column size) • Self wt of beam = .23 x .38 x 6.6 = .577 x 25 = 14.425 kN/m = 14.425 / 6.6 = 2.186 kN/m • LOAD TRANSFER FROM BEAM TO COLUMN slab load + beam self weight / 2 = 52.5 +14.425 /2 = 33.465 kN 6.6 m 7 m .4 m .4 m
- 7. • Self wt of beam = .23 x .38 x 6.6 = .577 x 25 = 14.425 kN/m = 14.425 / 6.6 = 2.186 kN/m • LOAD TRANSFER FROM BEAM TO COLUMN slab load + beam self weight / 2 = 52.5 +14.425 /2 = 33.465 kN • Second beam load calculation Self weight of beam = .23 x .23 x 2.77 = ( 3- .23 =2.77) = .147 x 25 = 3.675 = 3.675/2.77 = 1.327 kN/m • Column load calculation Self weight of column = .23 x .4 x 3 = .276 x 25 = 6.9 kN 2.77m 3 m .23 m .23 m
- 8. • FOOTING LOAD CALCULATION DEAD LOAD = 31.5 (SL)(DL) + 14.425 (BL)(DL) +3.675(SBL)(DL) /2 = 49.6 /2 = 24.8 + 6.9 (CSW) = 31.7kN LIVE LOAD 21 /2 = 10.5 kN • Total load on footing = dead load + live load = 31.7 + 10.5 = 42.2 kN TOTAL LOAD = 42.2 kN
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