Steel Beam Sizes / AISC / MC Channels / MC8x20
MC8x20 Steel Beam Dimensions and Properties
AISC Miscellaneous channels · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
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
Same-series weight neighbors, closest Ix, 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%)
Closest Iₓ 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