The unit weight of steel bars is the weight per unit length of a particular size of steel bar. It is an important consideration when calculating the weight of steel structures, as well as determining the cost of materials. In this blog post, we will explore the unit weight of steel bars of different diameters and how it is calculated.
There are several different types of steel bars available, including mild steel bars, high-yield strength bars, and deformed bars. The unit weight of each type of steel bar can vary based on the specific grade and size of the bar.
To calculate the unit weight of a steel bar, you need to know the density of steel and the cross-sectional area of the bar. The density of steel is typically around 7,850 kg/m³. To find the cross-sectional area of the bar, you can use the formula A = πr², where r is the radius of the bar.
For example, let’s say we have a steel bar with a diameter of 12 mm. To find the unit weight of this bar, we first need to calculate the radius, which is 6 mm. We can then plug this value into the formula above to find the cross-sectional area of the bar, which is 113.1 mm².
To find the unit weight of the bar, we simply multiply the density of steel by the cross-sectional area of the bar. In this case, the unit weight would be 7,850 kg/m³* 113.1 mm² = 0.888 kg/m.
Standard Unit Weight of Steel Bars
The standard Unit Weight of Steel Bars Per Meter Unit Length is as follows:
| Bar Diameter | Unit Weight (kg/m) | Unit Weight (kg/ft) |
|---|---|---|
| 6 MM | 0.222 KG | 0.0675 KG |
| 8 MM | 0.395 KG | 0.12 KG |
| 10 MM | 0.617 KG | 0.188 KG |
| 12 MM | 0.888 KG | 0.270 KG |
| 16 MM | 1.580 KG | 0.480 KG |
| 20 MM | 2.469 KG | 0.750 KG |
| 25 MM | 3.858 KG | 1.172 KG |
| 32 MM | 6.320 KG | 1.921 KG |
| 40 MM | 9.876 KG | 3.002 KG |
Conclusion
It’s important to note that the unit weight of steel bars can vary based on the specific type of steel being used. For example, the unit weight of mild steel bars will be different from the unit weight of high-yield strength bars. Additionally, the unit weight of steel bars can be affected by factors such as the manufacturing process and the presence of any impurities in the steel.
In conclusion, the unit weight of steel bars is an important consideration when working with steel structures. It can be calculated by multiplying the density of steel by the cross-sectional area of the bar. The unit weight of steel bars can vary based on the specific type of steel and other factors, so it’s important to use the correct value for your specific project.
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