Steel Calculation Of TMT Steel Bars
TMT steel is available in U-bent or straight rods with length 40 feet.
Usually, the civil contractors, engineers or architects will request the builder or home owner to purchase the TMT Steel as number of rods, number of bundles, in kgs (kilograms) or tons (MT).
Given below, the most recognized method for steel calculation by converting rods into bundles or kgs.
| TMT Size | TMT Weight per bundle | TMT Rods per bundle |
| 8mm 1 bundle | 47.41 kg | 10 |
| 10mm 1 bundle | 51.85 kg | 7 |
| 12mm 1 bundle | 53.33 kg | 5 |
| 16mm 1 bundle | 56.89 kg | 3 |
| 20mm 1 bundle | 59.26 kg | 2 |
| 25mm 1 bundle | 46.30 kg | 1 |
| 32mm 1 bundle | 75.85 kg | 1 |
Weight Tolerance
- 8mm and 10mm: ± 7%
- 12mm to 16mm: ± 5%
- 20mm to 32mm: ± 3%
As for instance, 8mm bundle may differ from 44.09 to 50.73 kgs.
Standard rod length: 12 meters.
To determine the weight of 1 TMT rod, the following formula is used :-
(dia * dia) / 162* 12 = weight of 1 TMT rod.
Dia denoes diameter in mm (8mm, 10mm, 12mm, 16mm, 20mm, 25mm or 32mm)
Tolerance is provided with adherence to IS:1786-2008 standard law.
