We knew that the D²/162.2 formula to calculate the weight of the rounded bar in Kg/m. But What about the weight of a steel plate or irregular shape?
Basically, any unit weight calculation falls under this broad formula
Unit weight = Volume X Density
Unit Weight of Steel Bars
From the above formula, Unit weight of steel bar = Volume of steel bar X Density of steel bar
We know Area of Ciricle = πr2 (where R=D/2) = πD2/4
Therefore the unit weight of steel per meter = Area of steel X Density of steel X Bar Length
= π(D2/4) x 7850 Kg/m3 x 1m
= 3.14 D2 /4 X 7850 X 1
= (6162.25 D2) / (10002) (since diameter is in mm converting to m -> 1 m = 1000 mm)
= D2 / 162.2
Therefore Unit weight of steel bar per metre formula is D2 / 162.2
Example Calculation of Steel Bar
What is the weight of 5m length & 16mm Dia bar?
Unit weight of steel bar = D2 / 162.2 X Lenght of the bar = (162)/ 162.2 X 5 m = 7.89 Kg
How to calculate flat steel bars weight?
Using the above Broad Formula,
Unit Weight of plate = Area x Density of Steel x Thickness
What is the weight of plate having measurement 5m x 2m and thickness 12mm?
Weight of plate = (5 x 2) x 7850 x 0.012 = 942 Kg
Steel Bar – Unit Weight Chart
Here we listed the steel bar weight chart which often used in the reinforcement.
|Dia of Bar||Weight in Kg/m|
We hope that now you understand the steel bar & steel plate weight calculation. Make use of the calculator.