Steel Beam Sizes / AISC / ST Tees / ST12x45
ST12x45 Dimensions, Weight and Section Properties
AISC American standard tees · v16.0
ST12x45: 12 in depth, 7.13 in flange width, 45 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
ST12x45 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 | 45.00 lb/ft | 67.00 kg/m |
| Depth, d | 12.00 in | 305.00 mm |
| Flange width, bf | 7.13 in | 181.00 mm |
| tw | 0.625 in | 15.900 mm |
| tf | 0.870 in | 22.100 mm |
| Area | 13.20 in² | 8,520.00 mm² |
| Ix | 190.00 in⁴ | 79,100,000 mm⁴ |
| Iy | 22.30 in⁴ | 9,280,000 mm⁴ |
| Sx | 22.60 in³ | 370,000.00 mm³ |
| Sy | 6.27 in³ | 103,000.00 mm³ |
| Zx | 41.10 in³ | 674,000.00 mm³ |
| Zy | 11.20 in³ | 184,000.00 mm³ |
| rx | 3.79 in | 96.30 mm |
| ry | 1.30 in | 33.00 mm |
| J | 3.01 in⁴ | 1,250,000 mm⁴ |
| Cw | 12.10 in⁶ | 3,250,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus ST12x45.
Lighter in ST12
ST12x40
- Weight
- 40.0 lb/ft (-11%)
- Depth
- 12.00 in (0.0%)
- Ix
- 162.0 in⁴ (-15%)
Heavier in ST12
ST12x50
- Weight
- 50.0 lb/ft (+11%)
- Depth
- 12.00 in (0.0%)
- Ix
- 215.0 in⁴ (+13%)
Another Iₓ option in ST12
ST12x53
- Weight
- 53.0 lb/ft (+18%)
- Depth
- 12.30 in (+2.5%)
- Ix
- 216.0 in⁴ (+14%)
Similar weight in ST10
ST10x43
- Weight
- 43.0 lb/ft (-4.4%)
- Depth
- 10.20 in (-15%)
- Ix
- 124.0 in⁴ (-35%)
Source: AISC Shapes Database v16.0 · Methodology