Rebar is the common name of ribbed steel bar, including hot-rolled ribbed steel bar and cold-rolled ribbed steel bar.
The grade of rebar is composed of HRB and the minimum yield point of rebar, which is divided into three grades: HRB335, HRB400 and HRB500.
For seismic reinforcement grade, “E” is added after ordinary reinforcement, such as HRB400E.
Since the billet density (7.85g/cm³) used for reinforcement rolling is the same, the theoretical weight of rebars of the same specification is the same regardless of whether the rolling method and grade are the same.
| Item | Model | Unit | Weight |
|---|---|---|---|
| Rebar | Φ6 | kg/m | 0.222 |
| Rebar | Φ8 | kg/m | 0.395 |
| Rebar | Φ10 | kg/m | 0.6169 |
| Rebar | Φ12 | kg/m | 0.888 |
| Rebar | Φ14 | kg/m | 1.21 |
| Rebar | Φ16 | kg/m | 1.58 |
| Rebar | Φ18 | kg/m | 2 |
| Rebar | Φ20 | kg/m | 2.47 |
| Rebar | Φ22 | kg/m | 2.98 |
| Rebar | Φ25 | kg/m | 3.85 |
| Rebar | Φ28 | kg/m | 4.83 |
| Rebar | Φ32 | kg/m | 6.31 |
| Rebar | Φ36 | kg/m | 7.99 |
| Rebar | Φ40 | kg/m | 9.87 |
| Rebar | Φ50 | kg/m | 15.42 |
| MS HR round wire rod | Φ5.5 | kg/m | 0.187 |
| MS HR round wire rod | Φ6.0 | kg/m | 0.222 |
| MS HR round wire rod | Φ6.5 | kg/m | 0.26 |
| MS HR round wire rod | Φ7.0 | kg/m | 0.3019 |
| MS HR round wire rod | Φ7.5 | kg/m | 0.3469 |
| Steel Strand for Prestressed Concrete（1×2） | 10 | kg/km | 310 |
| Steel Strand for Prestressed Concrete（1×2） | 12 | kg/km | 447 |
| Steel Strand for Prestressed Concrete（1×3） | 10.8 | kg/km | 465 |
| Steel Strand for Prestressed Concrete（1×3） | 12.9 | kg/km | 671 |
| Steel Strand for Prestressed Concrete（1×7）Standard | 9.5 | kg/km | 432 |
| Steel Strand for Prestressed Concrete（1×7）Standard | 11.1 | kg/km | 580 |
| Steel Strand for Prestressed Concrete（1×7）Standard | 12.7 | kg/km | 774 |
| Steel Strand for Prestressed Concrete（1×7）Standard | 15.2 | kg/km | 1101 |
| Steel Strand for Prestressed Concrete（1×7）Drawing Type | 12.7 | kg/km | 890 |
| Steel Strand for Prestressed Concrete（1×7）Drawing Type | 15.2 | kg/km | 1295 |
| Indented wire | 5 | kg/km | 0.016 |
Note:
(1) Theoretical weight calculation formula of rebar: theoretical weight (kg/m) = 0.00617 × D² (where, D is the section diameter, unit: mm)
(2) The density is calculated as 7.85g/cm³;
(3) The theoretical weight of hot-rolled ribbed bars, cold-rolled ribbed bars, HRB335, HRB400, HRB500 and other deformed bars of different classifications is the same.
(4) The theoretical weight calculated by the formula is different from the actual weight, and the error is generally about 0.2% ~ 0.7%, which can only be used as a reference for estimation.
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