Steel Beam Sizes / AISC / HSS Square / HSS 8x8x5/16

HSS 8x8x5/16 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 8x8x5/16 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 31.84 lb/ft 47.30 kg/m
Height 8.00 in 203.00 mm
Width 8.00 in 203.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 8.76 in² 5,650.00 mm²
Ix 85.60 in⁴ 35,600,000 mm⁴
Iy 85.60 in⁴ 35,600,000 mm⁴
Sx 21.40 in³ 351,000.00 mm³
Sy 21.40 in³ 351,000.00 mm³
Zx 25.10 in³ 411,000.00 mm³
Zy 25.10 in³ 411,000.00 mm³
rx 3.13 in 79.50 mm
ry 3.13 in 79.50 mm
J 136.00 in⁴ 56,600,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 8x8x5/16.

Lighter in Square HSS

HSS 12x12x3/16

Weight
29.8 lb/ft (-6.3%)
Depth
12.00 in (+50%)
Ix
189.0 in⁴ (+121%)

Heavier in Square HSS

HSS 7x7x3/8

Weight
32.6 lb/ft (+2.3%)
Depth
7.00 in (-13%)
Ix
65.0 in⁴ (-24%)

Closest Iₓ in Square HSS

HSS 7x7x1/2

Weight
42.1 lb/ft (+32%)
Depth
7.00 in (-13%)
Ix
80.5 in⁴ (-6.0%)
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Source: AISC Shapes Database v16.0 · Methodology