Steel Beam Sizes / AISC / MC Channels / MC13x31.8

MC13x31.8 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

MC13x31.8 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 31.80 lb/ft 47.30 kg/m
Depth, d 13.00 in 330.00 mm
Flange width, bf 4.00 in 102.00 mm
tw 0.375 in 9.530 mm
tf 0.610 in 15.500 mm
Area 9.35 in² 6,030.00 mm²
Ix 239.00 in⁴ 99,500,000 mm⁴
Iy 11.40 in⁴ 4,750,000 mm⁴
Sx 36.70 in³ 601,000.00 mm³
Sy 3.79 in³ 62,100.00 mm³
Zx 43.40 in³ 711,000.00 mm³
Zy 7.69 in³ 126,000.00 mm³
rx 5.05 in 128.00 mm
ry 1.10 in 27.90 mm
J 0.94 in⁴ 390,000.00 mm⁴
Cw 380.00 in⁶ 102,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC13x31.8.

Heavier in MC13

MC13x35

Weight
35.0 lb/ft (+10%)
Depth
13.00 in (0.0%)
Ix
252.0 in⁴ (+5.4%)

Closest Iₓ in MC13

MC13x40

Weight
40.0 lb/ft (+26%)
Depth
13.00 in (0.0%)
Ix
273.0 in⁴ (+14%)

Similar weight in MC12

MC12x31

Weight
31.0 lb/ft (-2.5%)
Depth
12.00 in (-7.7%)
Ix
202.0 in⁴ (-15%)
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Source: AISC Shapes Database v16.0 · Methodology