Steel Beam Sizes / AISC / MC Channels / MC12x31
MC12x31 Steel Beam Dimensions and Properties
AISC Miscellaneous channels · v16.0
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
MC12x31 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 | 31.00 lb/ft | 46.00 kg/m |
| Depth, d | 12.00 in | 305.00 mm |
| Flange width, bf | 3.67 in | 93.20 mm |
| tw | 0.370 in | 9.400 mm |
| tf | 0.700 in | 17.800 mm |
| Area | 9.12 in² | 5,880.00 mm² |
| Ix | 202.00 in⁴ | 84,100,000 mm⁴ |
| Iy | 11.30 in⁴ | 4,700,000 mm⁴ |
| Sx | 33.70 in³ | 552,000.00 mm³ |
| Sy | 4.37 in³ | 71,600.00 mm³ |
| Zx | 39.70 in³ | 651,000.00 mm³ |
| Zy | 8.15 in³ | 134,000.00 mm³ |
| rx | 4.71 in | 120.00 mm |
| ry | 1.11 in | 28.20 mm |
| J | 1.00 in⁴ | 416,000.00 mm⁴ |
| Cw | 267.00 in⁶ | 71,700,000,000 mm⁶ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC12x31.
Lighter in MC12
MC12x14.3
- Weight
- 14.3 lb/ft (-54%)
- Depth
- 12.00 in (0.0%)
- Ix
- 76.1 in⁴ (-62%)
Heavier in MC12
MC12x35
- Weight
- 35.0 lb/ft (+13%)
- Depth
- 12.00 in (0.0%)
- Ix
- 216.0 in⁴ (+6.9%)
Closest Iₓ in MC12
MC12x40
- Weight
- 40.0 lb/ft (+29%)
- Depth
- 12.00 in (0.0%)
- Ix
- 234.0 in⁴ (+16%)
Similar weight in MC13
MC13x31.8
- Weight
- 31.8 lb/ft (+2.6%)
- Depth
- 13.00 in (+8.3%)
- Ix
- 239.0 in⁴ (+18%)
Source: AISC Shapes Database v16.0 · Methodology