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Density = mass/volume
The unit weight of steel is 7850 kg/m3
volume of bar = (πd2/4)*L
hence mass = ((πd2/4)*L)*7850
= ((3.14 *d2/4)*1)*7850 for unit length
= 0.785*d2*7850
= 6162.25 d2 if d is in meters
or d2 /162 if d is in mm.
By putting the value of diameter of rod, you can calculate the unit weight of any size tmt bar.
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What is formula to calculate the area of steel bar?
The formula to calculate the area of a steel bar is A = πr^2, where A represents the area and r is the radius of the steel bar. This formula assumes that the steel bar is circular in shape. If the steel bar is a different shape, such as rectangular or square, the formula to calculate the area would be different based on the dimensions of the bar.
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