Steel Beam Sizes / Australia / Beam Tees / 345 BT 70
345 BT 70 Steel Beam Dimensions and Properties
ASNZS Tees cut from universal beams · v2019.11
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
345 BT 70 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 47.04 lb/ft | 70.00 kg/m |
| Depth, d | 13.43 in | 341.00 mm |
| Flange width, bf | 9.99 in | 253.70 mm |
| tw | 0.488 in | 12.400 mm |
| tf | 0.748 in | 19.000 mm |
| Area | 13.81 in² | 8,910.00 mm² |
| Ix | 236.17 in⁴ | 98,300,000 mm⁴ |
| Iy | 62.22 in⁴ | 25,900,000 mm⁴ |
| Sx | 23.51 in³ | 385,339.08 mm³ |
| Sy | 12.46 in³ | 204,178.16 mm³ |
| Zx | 41.98 in³ | 688,000.00 mm³ |
| Zy | 19.47 in³ | 319,000.00 mm³ |
| rx | 4.14 in | 105.04 mm |
| ry | 2.12 in | 53.92 mm |
| J | 2.02 in⁴ | 840,000.00 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus 345 BT 70.
Lighter in Tees cut from universal beams
305 BT 62
- Weight
- 62.0 kg/m (-11%)
- Depth
- 305.0 mm (-11%)
- Ix
- 68,300,000 mm⁴ (-31%)
Heavier in Tees cut from universal beams
380 BT 73
- Weight
- 73.0 kg/m (+4.3%)
- Depth
- 376.0 mm (+10%)
- Ix
- 132,000,000 mm⁴ (+34%)
Closest Iₓ in Tees cut from universal beams
345 BT 62
- Weight
- 62.0 kg/m (-11%)
- Depth
- 338.0 mm (-0.9%)
- Ix
- 89,100,000 mm⁴ (-9.4%)
Source: Australian-Sections.xlsx (Sheets 1-19) · v2019.11 · Methodology