Steel Beam Sizes / AISC / MC Channels / MC12x40

MC12x40 Steel Beam Dimensions and Properties

AISC Miscellaneous channels · v16.0

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

MC12x40 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 40.00 lb/ft 60.00 kg/m
Depth, d 12.00 in 305.00 mm
Flange width, bf 3.89 in 98.80 mm
tw 0.590 in 15.000 mm
tf 0.700 in 17.800 mm
Area 11.80 in² 7,610.00 mm²
Ix 234.00 in⁴ 97,400,000 mm⁴
Iy 14.20 in⁴ 5,910,000 mm⁴
Sx 39.00 in³ 639,000.00 mm³
Sy 4.98 in³ 81,600.00 mm³
Zx 47.70 in³ 782,000.00 mm³
Zy 9.31 in³ 153,000.00 mm³
rx 4.46 in 113.00 mm
ry 1.10 in 27.90 mm
J 1.69 in⁴ 703,000.00 mm⁴
Cw 336.00 in⁶ 90,200,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC12x40.

Lighter in MC12

MC12x35

Weight
35.0 lb/ft (-13%)
Depth
12.00 in (0.0%)
Ix
216.0 in⁴ (-7.7%)

Heavier in MC12

MC12x45

Weight
45.0 lb/ft (+13%)
Depth
12.00 in (0.0%)
Ix
251.0 in⁴ (+7.3%)

Closest Iₓ in MC12

MC12x31

Weight
31.0 lb/ft (-23%)
Depth
12.00 in (0.0%)
Ix
202.0 in⁴ (-14%)

Similar weight in MC13

MC13x40

Weight
40.0 lb/ft (0.0%)
Depth
13.00 in (+8.3%)
Ix
273.0 in⁴ (+17%)
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Source: AISC Shapes Database v16.0 · Methodology