BS 4449 reinforcement - Bar Sizes
UK reinforcing bar (BS 4449:2005), Grade B500A/B/C high-yield "H" bars, BS 8666 preferred sizes 8-40 mm.
Grades: B500A / B500B / B500C - characteristic yield f_yk = 500 MPa. "H" prefix = high-yield ribbed.
| Bar | Diameter | Area As | Mass |
|---|---|---|---|
| H8 (8 mm) | 8 mm | 50.3 mm² | 0.395 kg/m |
| H10 (10 mm) | 10 mm | 78.5 mm² | 0.617 kg/m |
| H12 (12 mm) | 12 mm | 113.1 mm² | 0.888 kg/m |
| H16 (16 mm) | 16 mm | 201.1 mm² | 1.578 kg/m |
| H20 (20 mm) | 20 mm | 314.2 mm² | 2.466 kg/m |
| H25 (25 mm) | 25 mm | 490.9 mm² | 3.853 kg/m |
| H32 (32 mm) | 32 mm | 804.2 mm² | 6.313 kg/m |
| H40 (40 mm) | 40 mm | 1256.6 mm² | 9.864 kg/m |