In this construction video tutorial, you will learn the process for determining the unit weight of steel bars.

The determine the unit weight, the following formula is used:-

W= D^2/162.2, here D denotes diameter of the steel bar

The formula is derived from the following concept:-

Weight = density x volume

It can also be demonstrated as weight = density x (area x length)

As we know, density of steel= 7850 kg/m^3,

Length= 1 m &

Area = pi x d^2/ 4

Therefore, weight = (7850 x (3.14/4) d^2 x 1000) / (10^9)

= d^2 x 0.00616225; it is also written as

= (d^2/1) x (0.00616225/1)

= d^2 / (1/162.2)

= d^2/162.2

Watch this video for getting more clear ideas

Video Courtesy : All about world