unit weight of that steel bar multiplied by its total length
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volume of steel multiplied by7850= wt of steel in kgs.
Please note that wt of 1 Cum steel is 7850 kg
Volume of steel bar can be calculated = cross-sectional area of bar X length
cross-sectional area of Bar= pie x d X d/4 (where d is diameter of bar)
Formula for steel bar weight per meter = D2/162 where D is diameter of bar
2.9876 kg/m is the weight of steel bar of 22 mm dia..and you use formula for other bars as d*d/162 Where d is a diameter of bar in mm.
formula calculation of steel round bar > Area (square metres) of cross section * 7850 = kilograms per metre length. For other lengths, multiply answer by length in metres.
to calculate the weight of diffrent dia bars is d2/162 D=dia of bar , and multiply into 2 times then divide it by 162
Calculate the length of steel you are going to use the building and muliply the length with unit weight of the steel.ex: 12 m 25mm steel weight is12 x 3.85 =46.2 kg3.85 kg/m is the unit weight of 25mm bar