It is very very crucial to know the unit weight of steel bars of different diameters for preparing bar bending schedule and BOQ.
How to Calculate Weight of Round Steel Bars:
After estimating, it is very important to know the unit weight of steel bars because we estimate them as 100 meters 20 mm ø bar, or 50 meters 16mm ø bar, etc (ø is the symbol of diameter). But material suppliers will not understand this notation, and they measure the steel bars in weight.
So we have to order them in kg or ton. So in this this blog post we are going to discuss how to calculate the weight of round steel bars of different diameters by using the steel weight formula.
Here is the steel unit weight formula W = D²/162 (Kg/m)
Where
W = Weight of steel bars.
D = Diameter of steel bars in mm.
Example 1: Calculate the unit weight of 12 mm ø bar.
Here,
D = 12 mm.
We know that,
W = D²/162
W = 12²/162 = 0.889 Kg/m
Let’s look for another example.
Example 2: Calculate the unit weight of 16 mm ø bar.
Here,
D = 16 mm.
W = 16²/162 = 1.58 Kg/m.
Similarly weight of other diameter of steel bar using the formula above will get be.
6 mm ø bar = 6² x 1/162 = 0.222 kg/m
8 mm ø bar = 8² x 1/162 = 0.395 kg/m
10mm ø bar = 10² x 1/162 = 0.617 kg/m
12mm ø bar = 12² x 1/162 = 0.888 kg/m
16mm ø bar = 16² x 1/162 = 1.580 kg/m
20mm ø bar = 20² x 1/162 = 2.469 kg/m
If we multiply the length of bars by this unit weight, we will get the total weight of steel bars. For example, the total weight of 1000 meter long 20mm ø steel bar is,
1000 x 2.469 = 2469 kg.
Using the same method we can calculate the weight of different steel bars. Here I have calculated in meter but we can also calculate in feet.
W= D²L/162 Kg
Where
D = Diameter of bars in mm.
L = Length of bars in meter.
W= Weight of steel
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Conclusion
In conclusion, this is “How to calculate the weight of round steel bars” so in case you have a task that require this knowledge and you don't know how you just use this content as your reference.
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