Answer / seenu

Rolling margin can be defined as a test conducted for a
steel of 1m length to check whether the manufactured steel
is coming according to therotical unit weight of steel.

Also this is to check between theoritical unit wt and actual
wt of steel. Practically actual wt should not be less than
the theoritical unit wt of steel.

Answer / nitin

Rolling margin is the weight of 1m reinforcement bar taken in order to calculate the over all weight of steel. This is done to find the weight difference of steel as per standard norms.

While calculating the weight of the steel per running meter, the formula used is [(dxd)/162]. Why 162 is used in denominator & how it is derived?

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