Steel Beam Sizes / AISC / HSS Rectangular / HSS 12x3x5/16

HSS 12x3x5/16 Steel Beam Dimensions and Properties

AISC Rectangular HSS · v16.0

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

Units

Section diagram

HSS 12x3x5/16 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 29.72 lb/ft 44.20 kg/m
Height 12.00 in 305.00 mm
Width 3.00 in 76.20 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 8.17 in² 5,270.00 mm²
Ix 124.00 in⁴ 51,600,000 mm⁴
Iy 13.10 in⁴ 5,450,000 mm⁴
Sx 20.70 in³ 339,000.00 mm³
Sy 8.73 in³ 143,000.00 mm³
Zx 27.90 in³ 457,000.00 mm³
Zy 10.00 in³ 164,000.00 mm³
rx 3.90 in 99.10 mm
ry 1.27 in 32.30 mm
J 41.30 in⁴ 17,200,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 12x3x5/16.

Lighter in Rectangular HSS

HSS 10x8x1/4

Weight
29.2 lb/ft (-1.6%)
Depth
10.00 in (-17%)
Ix
119.0 in⁴ (-4.0%)

Heavier in Rectangular HSS

HSS 10x3x3/8

Weight
30.0 lb/ft (+1.0%)
Depth
10.00 in (-17%)
Ix
88.0 in⁴ (-29%)

Closest Iₓ in Rectangular HSS

HSS 10x5x3/8

Weight
35.1 lb/ft (+18%)
Depth
10.00 in (-17%)
Ix
120.0 in⁴ (-3.2%)
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Source: AISC Shapes Database v16.0 · Methodology