Steel Beam Sizes / AISC / MC Channels / MC8x20
MC8x20 Dimensions, Weight and Section Properties
AISC Miscellaneous channels · v16.0
MC8x20: 8 in depth, 3.03 in flange width, 20 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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Section diagram
MC8x20 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 | 20.00 lb/ft | 29.80 kg/m |
| Depth, d | 8.00 in | 203.00 mm |
| Flange width, bf | 3.03 in | 77.00 mm |
| tw | 0.400 in | 10.200 mm |
| tf | 0.500 in | 12.700 mm |
| Area | 5.87 in² | 3,790.00 mm² |
| Ix | 54.40 in⁴ | 22,600,000 mm⁴ |
| Iy | 4.42 in⁴ | 1,840,000 mm⁴ |
| Sx | 13.60 in³ | 223,000.00 mm³ |
| Sy | 2.02 in³ | 33,100.00 mm³ |
| Zx | 16.40 in³ | 269,000.00 mm³ |
| Zy | 3.86 in³ | 63,300.00 mm³ |
| rx | 3.04 in | 77.20 mm |
| ry | 0.87 in | 22.00 mm |
| J | 0.44 in⁴ | 184,000.00 mm⁴ |
| Cw | 47.80 in⁶ | 12,800,000,000 mm⁶ |
Alternatives
Useful nearby sections
Compare weight neighbors, another Ix option, and a nearby depth series when available, with percent change versus MC8x20.
Lighter in MC8
MC8x18.7
- Weight
- 18.7 lb/ft (-6.5%)
- Depth
- 8.00 in (0.0%)
- Ix
- 52.4 in⁴ (-3.7%)
Heavier in MC8
MC8x21.4
- Weight
- 21.4 lb/ft (+7.0%)
- Depth
- 8.00 in (0.0%)
- Ix
- 61.5 in⁴ (+13%)
Another Iₓ option in MC8
MC8x22.8
- Weight
- 22.8 lb/ft (+14%)
- Depth
- 8.00 in (0.0%)
- Ix
- 63.8 in⁴ (+17%)
Similar weight in MC7
MC7x19.1
- Weight
- 19.1 lb/ft (-4.5%)
- Depth
- 7.00 in (-13%)
- Ix
- 43.1 in⁴ (-21%)
Source: AISC Shapes Database v16.0 · Methodology