Steel Beam Sizes / AISC / MC Channels / MC12x31
MC12x31 Dimensions, Weight and Section Properties
AISC Miscellaneous channels · v16.0
MC12x31: 12 in depth, 3.67 in flange width, 31 lb/ft weight. View the full dimensions and properties in imperial and metric units below.
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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
Compare weight neighbors, another Ix option, 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%)
Another Iₓ option 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