If we have isolated Footing then how to Calculate Reinforcement for BBS
Given
Size of Footing = 2000mm x 1500mm
Clear Cover = 50 mm
No. Of Footing = 1 nos
Main Bar = 12mm @ 100 mm c/c Spacing
Distribution Bar = 10mm @ 150 mm c/c Spacing
Hook Length = 9d
Step : 1 Cutting Length of Main Bar
The Main Bar is Always in the Short Span ,wheather it is a Slab or Footing.
Cutting Length of Main Bar
= Width of Footing – (2 x Clear Cover ) + (2 x 9d hook) – (2 bend 90deg)
= 1500 mm – (2 x 50) + (2 x 9 x12) – (2 x 2 x 12)
= 1500 mm – 100 + 216 – 48 = 1568 mm
Step : 2 Cutting Length of Distribution Bar
Cutting Length of Distribution Bar
= Length of Footing – (2 x Clear Cover ) + (2 x 9d hook) – (2 bend 90deg)
= 2000 mm – (2 x 50) + (2 x 9 x10) – (2 x 2 x 10)
= 2000 mm – 100 + 180 – 40 = 2040 mm
