how calculate bbs of all slabs?
Hello,
To calculate bbs of all slabs there are three steps :
1. Calculate number of bars :
Formula :
(Total length - Clear cover)/center to center spacing + 1
2. Cutting length :
Formula :
Main Bar
L + (2*Ld) + (1*0.42D) - (2*1d)
where L= Clear span
Ld= Development length
0.42D = Inclined length
1d=45 degrees .
Length D=(thickness) - 2*(claear cover at TOP , BOTTOM)-Diameter of the bar
Distribution Ba r
Formula :
Clear span + (2*Ld)
Length=(Number of bars * cutting length)
Weight = (D^2/162)
Calculate length and weight for main and Distribution bar