Steel Beam Sizes / AISC / WT Tees / WT18x85
WT18x85 Dimensions, Weight and Section Properties
AISC Structural tees · v16.0
WT18x85: 18.1 in depth, 12 in flange width, 85 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
WT18x85 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 | 85.00 lb/ft | 127.00 kg/m |
| Depth, d | 18.10 in | 460.00 mm |
| Flange width, bf | 12.00 in | 305.00 mm |
| tw | 0.680 in | 17.300 mm |
| tf | 1.100 in | 27.900 mm |
| Area | 25.00 in² | 16,100.00 mm² |
| Ix | 786.00 in⁴ | 327,000,000 mm⁴ |
| Iy | 160.00 in⁴ | 66,600,000 mm⁴ |
| Sx | 58.90 in³ | 965,000.00 mm³ |
| Sy | 26.60 in³ | 436,000.00 mm³ |
| Zx | 105.00 in³ | 1,720,000 mm³ |
| Zy | 41.80 in³ | 685,000.00 mm³ |
| rx | 5.61 in | 142.00 mm |
| ry | 2.53 in | 64.30 mm |
| J | 7.51 in⁴ | 3,130,000 mm⁴ |
| Cw | 63.20 in⁶ | 17,000,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus WT18x85.
Lighter in WT18
WT18x80
- Weight
- 80.0 lb/ft (-5.9%)
- Depth
- 18.00 in (-0.6%)
- Ix
- 740.0 in⁴ (-5.9%)
Heavier in WT18
WT18x91
- Weight
- 91.0 lb/ft (+7.1%)
- Depth
- 18.20 in (+0.6%)
- Ix
- 845.0 in⁴ (+7.5%)
Another Iₓ option in WT18
WT18x75
- Weight
- 75.0 lb/ft (-12%)
- Depth
- 17.90 in (-1.1%)
- Ix
- 698.0 in⁴ (-11%)
Similar weight in WT16
WT16.5x84.5
- Weight
- 84.5 lb/ft (-0.6%)
- Depth
- 16.90 in (-6.6%)
- Ix
- 649.0 in⁴ (-17%)
Source: AISC Shapes Database v16.0 · Methodology