Steel Beam Sizes / AISC / HSS Rectangular / HSS 8x4x5/16

HSS 8x4x5/16 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 8x4x5/16 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 23.34 lb/ft 34.70 kg/m
Height 8.00 in 203.00 mm
Width 4.00 in 102.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 6.43 in² 4,150.00 mm²
Ix 51.00 in⁴ 21,200,000 mm⁴
Iy 17.20 in⁴ 7,160,000 mm⁴
Sx 12.80 in³ 210,000.00 mm³
Sy 8.58 in³ 141,000.00 mm³
Zx 16.10 in³ 264,000.00 mm³
Zy 9.91 in³ 162,000.00 mm³
rx 2.82 in 71.60 mm
ry 1.63 in 41.40 mm
J 42.60 in⁴ 17,700,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 8x4x5/16.

Lighter in Rectangular HSS

HSS 10x4x1/4

Weight
22.4 lb/ft (-3.9%)
Depth
10.00 in (+25%)
Ix
74.7 in⁴ (+46%)

Heavier in Rectangular HSS

HSS 10x5x1/4

Weight
24.1 lb/ft (+3.3%)
Depth
10.00 in (+25%)
Ix
85.8 in⁴ (+68%)

Closest Iₓ in Rectangular HSS

HSS 9x5x3/16

Weight
17.1 lb/ft (-27%)
Depth
9.00 in (+13%)
Ix
51.1 in⁴ (+0.2%)
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Source: AISC Shapes Database v16.0 · Methodology