The steel weight formula for a cylindrical steel rod/bar is:
W = (π/4)⋅d2⋅l⋅ρ
where:
d — Rod's diameter in mm;
l — Rod's length in m; and
ρ — Steel's density in kg/m3.
Accounting for unit conversions and steel density of 7850 kg/m3, the following approximate formula is used for TMT steel bars:
W = d2⋅l/162
Here, the denominator 162 is an approximate simplification of the unit conversion and steel density:
(π/4)⋅(10-3)2⋅7850 =1/162.19.. ≈ 1/162 Read more