Steel Beam Sizes / AISC / HSS Rectangular / HSS 18x6x5/16

HSS 18x6x5/16 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 18x6x5/16 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 48.86 lb/ft 72.70 kg/m
Height 18.00 in 457.00 mm
Width 6.00 in 152.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 13.40 in² 8,650.00 mm²
Ix 513.00 in⁴ 214,000,000 mm⁴
Iy 91.30 in⁴ 38,000,000 mm⁴
Sx 57.00 in³ 934,000.00 mm³
Sy 30.40 in³ 498,000.00 mm³
Zx 73.10 in³ 1,200,000 mm³
Zy 33.50 in³ 549,000.00 mm³
rx 6.18 in 157.00 mm
ry 2.61 in 66.30 mm
J 257.00 in⁴ 107,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18x6x5/16.

Lighter in Rectangular HSS

HSS 10x6x1/2

Weight
48.9 lb/ft (0.0%)
Depth
10.00 in (-44%)
Ix
171.0 in⁴ (-67%)

Heavier in Rectangular HSS

HSS 10x4x5/8

Weight
50.8 lb/ft (+4.0%)
Depth
10.00 in (-44%)
Ix
149.0 in⁴ (-71%)

Closest Iₓ in Rectangular HSS

HSS 14x12x3/8

Weight
63.2 lb/ft (+29%)
Depth
14.00 in (-22%)
Ix
512.0 in⁴ (-0.2%)
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Source: AISC Shapes Database v16.0 · Methodology