Bar Bending Schedule for Footing [BBS]
How do you prepare Bar Bending Schedule for Footing
Do u know,read Footing Drawing
Okay, Let's see 👀
This is a square footing drawing first u learn read carefully given footing drawing and note all the important points like.
Footing. (Length, Width, Thickness)
Length - 2m , Width- 2m, Thickness - 0.250m
Diameter of Footing reinforcement bar - 12mm Dia
Grade of reinforcement is going to use
Spacing of the reinforcement (c/c) each direction 150mm
Hook's length (If needed)
Concrete Covers of the Footing (Top and Bottom) - 50mm Top and 70 mm Bottom.
Then find requirements Weight of steel bar in that drawing.
Bar Bending Schedule for One Way Slab
No's of Distribution Reinforcement bar
= (Total distance — clear cover) / c/c + 1
= (2 - (0.05+0.05) / 0.15 + 1 = 14 Bars
Cutting Length = [Total length — 2(Half diameter of the bar + Clear cover) + 2(Thickness of the slab —Bottom and Top clear cover — Half diameter of the bar)]
Length of 1 Distribution Bar:
= 2 - 2 (0.006 + 0.05) + 2 (0.250 - 0.075 - 0 05 - 0.006)
= 2 - 2 (0.1 12) +2 (0.119)
= 2 - 0.224 + 0.283
= 2.059 m
Total Length = Length of one bar x No's of bars
= 2.059 x 14
= 28.826 m
Weight of Distribution bar
= D2 / 162.2 x Length
= D2 /162.2 x 28.826 m
= 25.32 kg
CONCLUSION:
1: Footing Main Bar
Diameter of the Reinforcement bar and center to center spacing = 12 mm dia @150 c/c
Number of Main Reinforcement Bar = 14 No's
Weight Of main Reinforcement bars = 25.32 kg
2: Footing Distribution Bar - It's also same Length of bar and weight.