Steel Beam Sizes / AISC / HSS Square / HSS 3-1/2x3-1/2x5/16

HSS 3-1/2x3-1/2x5/16 Steel Beam Dimensions and Properties

AISC Square HSS · v16.0

Analyze in Beam Calculator Back to HSS Square

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

Units

Section diagram

HSS 3-1/2x3-1/2x5/16 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 12.70 lb/ft 18.80 kg/m
Height 3.50 in 88.90 mm
Width 3.50 in 88.90 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 3.52 in² 2,270.00 mm²
Ix 5.84 in⁴ 2,430,000 mm⁴
Iy 5.84 in⁴ 2,430,000 mm⁴
Sx 3.34 in³ 54,700.00 mm³
Sy 3.34 in³ 54,700.00 mm³
Zx 4.14 in³ 67,800.00 mm³
Zy 4.14 in³ 67,800.00 mm³
rx 1.29 in 32.80 mm
ry 1.29 in 32.80 mm
J 9.89 in⁴ 4,120,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 3-1/2x3-1/2x5/16.

Lighter in Square HSS

HSS 4x4x1/4

Weight
12.2 lb/ft (-3.9%)
Depth
4.00 in (+14%)
Ix
7.8 in⁴ (+34%)

Heavier in Square HSS

HSS 5-1/2x5-1/2x3/16

Weight
13.3 lb/ft (+4.3%)
Depth
5.50 in (+57%)
Ix
17.0 in⁴ (+191%)

Closest Iₓ in Square HSS

HSS 4x4x3/16

Weight
9.4 lb/ft (-26%)
Depth
4.00 in (+14%)
Ix
6.2 in⁴ (+6.3%)
Analyze in Beam Calculator Compare in HSS Square finder

Source: AISC Shapes Database v16.0 · Methodology