Steel Beam Sizes / AISC / HSS Square / HSS 3-1/2x3-1/2x1/8

HSS 3-1/2x3-1/2x1/8 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 3-1/2x3-1/2x1/8 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 5.61 lb/ft 8.33 kg/m
Height 3.50 in 88.90 mm
Width 3.50 in 88.90 mm
Nominal tw 0.125 in 3.180 mm
Design tw 0.116 in 2.950 mm
Area 1.54 in² 994.00 mm²
Ix 2.90 in⁴ 1,210,000 mm⁴
Iy 2.90 in⁴ 1,210,000 mm⁴
Sx 1.66 in³ 27,200.00 mm³
Sy 1.66 in³ 27,200.00 mm³
Zx 1.93 in³ 31,600.00 mm³
Zy 1.93 in³ 31,600.00 mm³
rx 1.37 in 34.80 mm
ry 1.37 in 34.80 mm
J 4.58 in⁴ 1,910,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 3-1/2x3-1/2x1/8.

Lighter in Square HSS

HSS 2-1/2x2-1/2x3/16

Weight
5.6 lb/ft (-0.4%)
Depth
2.50 in (-29%)
Ix
1.4 in⁴ (-53%)

Heavier in Square HSS

HSS 2-1/4x2-1/4x1/4

Weight
6.3 lb/ft (+12%)
Depth
2.25 in (-36%)
Ix
1.1 in⁴ (-61%)

Closest Iₓ in Square HSS

HSS 3x3x1/4

Weight
8.8 lb/ft (+57%)
Depth
3.00 in (-14%)
Ix
3.0 in⁴ (+4.1%)
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Source: AISC Shapes Database v16.0 · Methodology