Answer / suresh

Rolling margin is the difference between the actual and
theoritical weight of steel sections. It may be up to 1%. +
means overweight and - means under weight

Answer / sandeep reddy

it means difference of actual weight and theoritical weight of steel.

for 8 and 10 mm =7+_
for 12 and 16 mm=5+_
for 20 and above =3+_
as per IS Code

Answer / kumar

yes you are right

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