Let us consider a tor steel of diameter 'd' mm and length 1 m
d mm=d*10^-6 m
Area of cross section,A=(3.14*d^2*10^-6)/4
Volume of steel bar of length 1 m=((3.14*d^2*10^-6)/4)*1 m
Sp.Weight of steel=7850 kg/m3
so,Weight of tor steel=((3.14*d^2*10^-6)/4)*7850 Kg
Hence 162 is nothing but a constant used for calculating weight of all type of tor steel and it is found out from;
(4*10^6)/(3.14*7850)=162
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=3.14 x d2 /4 x 7850x1m =3.14x(8)2/4 x7850 =50.24x 7850 =394384x1m =394383/(1000x1000) =0.394 =0.394kg/m
TOR Steel: Twisted Ore Reinforced Steel
TOR is a Brand Name originally marketed by TORISTEG STEEL CORPORATION of Luxembourg, Germany.
Unit Weights of TOR steel bars8mm dia : 0.395 kg/m10mm dia : 0.617 kg/m12mm dia : 0.888 kg/m16mm dia : 1.579 kg/m20mm dia : 2.467 kg/m25mm dia : 3.855 kg/mThese are standard unit weights in India based on the density of steel @ 7850 kg/m3
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