Steel Beam Sizes / AISC / HSS Square / HSS 3-1/2x3-1/2x3/8

HSS 3-1/2x3-1/2x3/8 Steel Beam Dimensions and Properties

AISC Square HSS · v16.0

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

Units

Section diagram

HSS 3-1/2x3-1/2x3/8 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 14.72 lb/ft 21.80 kg/m
Height 3.50 in 88.90 mm
Width 3.50 in 88.90 mm
Nominal tw 0.375 in 9.530 mm
Design tw 0.349 in 8.860 mm
Area 4.09 in² 2,640.00 mm²
Ix 6.49 in⁴ 2,700,000 mm⁴
Iy 6.49 in⁴ 2,700,000 mm⁴
Sx 3.71 in³ 60,800.00 mm³
Sy 3.71 in³ 60,800.00 mm³
Zx 4.69 in³ 76,900.00 mm³
Zy 4.69 in³ 76,900.00 mm³
rx 1.26 in 32.00 mm
ry 1.26 in 32.00 mm
J 11.20 in⁴ 4,660,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 3-1/2x3-1/2x3/8.

Lighter in Square HSS

HSS 6x6x3/16

Weight
14.5 lb/ft (-1.3%)
Depth
6.00 in (+71%)
Ix
22.3 in⁴ (+244%)

Heavier in Square HSS

HSS 4x4x5/16

Weight
14.8 lb/ft (+0.7%)
Depth
4.00 in (+14%)
Ix
9.1 in⁴ (+41%)

Closest Iₓ in Square HSS

HSS 4-1/2x4-1/2x1/8

Weight
7.3 lb/ft (-50%)
Depth
4.50 in (+29%)
Ix
6.4 in⁴ (-2.2%)
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Source: AISC Shapes Database v16.0 · Methodology