Steel Beam Sizes / AISC / M-Shapes / M12.5x12.4

M12.5x12.4 Steel Beam Dimensions and Properties

AISC Miscellaneous beams · v16.0

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

Units

Section diagram

M12.5x12.4 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 12.40 lb/ft 18.50 kg/m
Depth, d 12.50 in 318.00 mm
Flange width, bf 3.75 in 95.30 mm
tw 0.155 in 3.940 mm
tf 0.228 in 5.790 mm
Area 3.63 in² 2,340.00 mm²
Ix 89.30 in⁴ 37,200,000 mm⁴
Iy 2.01 in⁴ 837,000.00 mm⁴
Sx 14.20 in³ 233,000.00 mm³
Sy 1.07 in³ 17,500.00 mm³
Zx 16.50 in³ 270,000.00 mm³
Zy 1.68 in³ 27,500.00 mm³
rx 4.96 in 126.00 mm
ry 0.74 in 18.90 mm
J 0.05 in⁴ 20,500.00 mm⁴
Cw 76.00 in⁶ 20,400,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus M12.5x12.4.

Lighter in M12

M12x11.8

Weight
11.8 lb/ft (-4.8%)
Depth
12.00 in (-4.0%)
Ix
72.2 in⁴ (-19%)

Closest Iₓ in M12

M12.5x11.6

Weight
11.6 lb/ft (-6.5%)
Depth
12.50 in (0.0%)
Ix
80.3 in⁴ (-10%)

Similar weight in M10

M10x9

Weight
9.0 lb/ft (-27%)
Depth
10.00 in (-20%)
Ix
39.0 in⁴ (-56%)
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Source: AISC Shapes Database v16.0 · Methodology