Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x8x1/2
HSS 20x8x1/2 Dimensions, Weight and Section Properties
AISC Rectangular HSS · v16.0
HSS 20x8x1/2: 89.68 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
HSS 20x8x1/2 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 | 89.68 lb/ft | 133.00 kg/m |
| Height | 20.00 in | 508.00 mm |
| Width | 8.00 in | 203.00 mm |
| Nominal tw | 0.500 in | 12.700 mm |
| Design tw | 0.465 in | 11.800 mm |
| Area | 24.60 in² | 15,900.00 mm² |
| Ix | 1,190.00 in⁴ | 495,000,000 mm⁴ |
| Iy | 283.00 in⁴ | 118,000,000 mm⁴ |
| Sx | 119.00 in³ | 1,950,000 mm³ |
| Sy | 70.80 in³ | 1,160,000 mm³ |
| Zx | 152.00 in³ | 2,490,000 mm³ |
| Zy | 79.50 in³ | 1,300,000 mm³ |
| rx | 6.96 in | 177.00 mm |
| ry | 3.39 in | 86.10 mm |
| J | 757.00 in⁴ | 315,000,000 mm⁴ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus HSS 20x8x1/2.
Lighter in Rectangular HSS
HSS 20x16x3/8
- Weight
- 88.7 lb/ft (-1.1%)
- Depth
- 20.00 in (0.0%)
- Ix
- 1,470.0 in⁴ (+24%)
Heavier in Rectangular HSS
HSS 24x20x5/16
- Weight
- 91.4 lb/ft (+1.9%)
- Depth
- 24.00 in (+20%)
- Ix
- 2,230.0 in⁴ (+87%)
Another Iₓ option in Rectangular HSS
HSS 20x12x3/8
- Weight
- 78.5 lb/ft (-12%)
- Depth
- 20.00 in (0.0%)
- Ix
- 1,200.0 in⁴ (+0.8%)
Source: AISC Shapes Database v16.0 · Methodology