To calculate the weight of a square, simply enter the side size (for example, 40x40) and the length. The service takes into account GOST 2591 and GOST 8559, which eliminates errors.
GOST 2591 and GOST 8559: standards for steel squares
In Russia, the production of hot-rolled (GOST 2591-2021) and cold-formed (GOST 8559-75) squares is regulated by strict standards. For example, a 20x20 square according to GOST 2591 has a thickness tolerance of ±1 mm, and according to GOST 8559 - ±0.5 mm. These differences affect the weight of 1 meter of the profile.
Formula for calculating the weight of a steel square
Weight of steel square (kg/m) = (A² * ρ) / 1000
where:
- A - side of the square in mm (for example, 40x40);
- ρ - density of steel (7850 kg/m³).
For quick calculations, use the simplified formula:
Weight per meter = 0.00785 * A²
A 50x50 square weighs 0.00785 * 2500 = 19.625 kg/m.
Calculation examples for popular sizes
| Size (mm) | Weight per meter (kg) |
|---|---|
| 20x20 | 3.14 |
| 40x40 | 12.56 |
| 50x50 | 19.625 |
| 100x100 | 78.5 |
Features of calculating the weight of a square tube
The weight of a square tube depends on the wall thickness. For example, a 50x50 profile with a thickness of 5 mm is calculated by the formula:
(Perimeter * Thickness * ρ) / 1000
At a density of 7850 kg/m³: (200 * 5 * 7850) / 1,000,000 = 7.85 kg/m.
Why is it important to calculate weight accurately?
Errors in calculating the weight of 1 square lead to budget overruns or structural integrity violations. Use reliable calculators and cross-check with GOST tables - this will save up to 15% on metal costs.