Rebar, also known as reinforcement steel and reinforcing steel, is a steel bar or mesh of steel wires used in reinforced concrete and masonry structures to strengthen and hold the concrete in tension. To improve the quality of the bond with the concrete, the surface of rebar is often patterned.
Standards
| ASTM | JIS | GOST | ISO | BS |
| A615 GR.40 | G3112SR235 | 380 ST 3SP | 6935-B300A-R | 4449 B500A |
| A615 GR.60 | G3112SR295 | 380 ST 5SP | 6935-B400A-R | 4449 B500B |
Dimensions
| Nominal Diameter | G (kg/m) | Weight Tolerance (%) |
| 8 | 0.395 | ±8 |
| 10 | 0.616 | ±5.5 |
| 12 | 0.888 | ±5.5 |
| 14 | 1.21 | ±5.5 |
| 16 | 1.58 | ±4.5 |
| 18 | 2.00 | ±4.5 |
| 20 | 2.47 | ±4.5 |
| 22 | 2.98 | ±4.5 |
| 25 | 3.85 | ±4.5 |
| 28 | 4.83 | ±4.5 |
| 32 | 6.31 | ±4.5 |