Estimating Sheet

# How to determine bar bending schedule and quantity of steel in a footing

Construction Software In this construction video tutorial, one can learn how to determine the BBS of footing as well as the quantity of steel used in footing.

The dimensions of the section are given as follow :-

Length of footing = 2000 mm
Width of footing = 1500 mm
Thickness (flat part) = 300 mm
Dia of bar (all) = 12 mm
Spacing (both sides) = 150 mm
Clear cover = 50 mm

On the basis of the above dimensions, the following formulas are used to find out the BBS :-

No. of bar = Total Length/Spacing +1
No. of main bar = Width/Spacing+1 = 1500/150+1 = 11 Nos.
No. of distribution bar = Length/Spacing+1 = 2000/150+1 = 14 Nos.

To determine the cutting length of main bar, the following formula is used :-

Cutting Length Of Main Bar = (Total length – 2 x cover) + 2(thickness – 2 x cover) – 2 x bend deduction

After putting all the values, we get = (2000 – 2 x 50) + 2(300 – 2x50) – 2 x 2d = (2000-100) + 2(300-100) – 2x2x12 = 1900+400-48 = 2300 – 48 = 2252 mm or 2.252 m. 