How to replace dia of bar in beam like 25mm 3no.S at bottom
But due to some reason on site 25mm bar is not available
Then is it ok to provide 20mm 4no.S? Give description or
Formula to calculate area of steel and replacement?
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Answer Posted / manoj kumar
The formula or the thumb rule for finding of no of bars with spacing .
Let the d= dia of the bar which is to be provided at the place of given bar.
D= dia of given bar in the drawings.
Spacing = d2/D2x(given spacing of bar in dwg.)
for Eg.
d=20, D=25 spacing=200
s=(400/625)x200=128
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