How
(D2/162) × L
Formula for unit weight of steel
There is a formula to calculate the unit weight
of steel bars, because steel bar suppliers measure the steel bars as
weight. So we have to order them in weight for purchasing. The
weight of steel bars can be expressed in kg or quintal or ton.
Derivation for (D2/162)
×L:
Volume
of steel = Area × length
Area of steel = (π/4) × D2
Unit length of steel = 1m
Value of π = 3.141
Volume of steel =
(3.141/4) × D2 × 1
Unit weight of steel or density of steel = 7850kg/m3
Weight
of steel = volum Volume of steel
= Area × length
Area of steel= (π/4) × D2
Unit length of steel = 1m
Value of π =
3.141
Volume of steel =
(3.141/4) × D2 × 1
Unit weight of steel or density of steel = 7850kg/m3
Weight of steel =
volume of steel × density
= (3.141/4) × D2 × 1 × ( 7850/13)
= (3.141/4) × D2 × 1000 ×
(7850/1000×1000×1000)
= (3.141/4) × D2 × (7850/1000×1000)
= 0.785 × D2 × 0.00785
= 0.00162 × D2
e of steel × density
= (3.141/4) × D2 × 1 × (7850/13)
= (3.141/4) × D2 × 1000 ×
(7850/1000×1000×1000)
= (3.141/4) × D2 × (7850/1000×1000)
= 0.785 × D2 × 0.00785
= 0.00162 × D2
= 0.00162 × D2/1
= D2/162
Formula
for Volume of steel= Area × length
Area of steel= (π/4) × D2
Unit length of steel = 1m
Value of π =
3.141
Volume of steel =
(3.141/4) × D2 × 1
Unit weight of steel or density of steel = 7850kg/m3
Weight of steel =
volume of steel × density
= (3.141/4) × D2 × 1 × ( 7850/13)
= (3.141/4) × D2 × 1000 ×
(7850/1000×1000×1000)
= (3.141/4) × D2 × (7850/1000×1000)
= 0.785 × D2 × 0.00785
= 0.00162 × D2
Per 1m length of bar Weight of steel is
= D2/162 × 1
1 quintal
= 100kg
1
ton = 1000kg
The Weights
Per Unit length (Kg/m) of circular steel bars are:
