Steel Beam Sizes / Australia / Beam Tees / 345 BT 70
345 BT 70 Dimensions, Weight and Section Properties
ASNZS Tees cut from universal beams · v2019.11
345 BT 70: 341 mm depth, 253.7 mm flange width, 70 kg/m weight. View the full dimensions and properties in imperial and metric units below.
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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
Compare weight neighbors, another Ix option, 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%)
Another Iₓ option 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