Steel Beam Sizes / AISC / HSS Rectangular / HSS 18x10x5/16

HSS 18x10x5/16 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 18x10x5/16 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 57.36 lb/ft 85.40 kg/m
Height 18.00 in 457.00 mm
Width 10.00 in 254.00 mm
Nominal tw 0.313 in 7.950 mm
Design tw 0.291 in 7.390 mm
Area 15.70 in² 10,100.00 mm²
Ix 695.00 in⁴ 289,000,000 mm⁴
Iy 282.00 in⁴ 117,000,000 mm⁴
Sx 77.20 in³ 1,270,000 mm³
Sy 56.40 in³ 924,000.00 mm³
Zx 93.70 in³ 1,540,000 mm³
Zy 62.70 in³ 1,030,000 mm³
rx 6.65 in 169.00 mm
ry 4.23 in 107.00 mm
J 635.00 in⁴ 264,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18x10x5/16.

Lighter in Rectangular HSS

HSS 10x8x1/2

Weight
55.7 lb/ft (-3.0%)
Depth
10.00 in (-44%)
Ix
214.0 in⁴ (-69%)

Heavier in Rectangular HSS

HSS 14x10x3/8

Weight
58.1 lb/ft (+1.3%)
Depth
14.00 in (-22%)
Ix
447.0 in⁴ (-36%)

Closest Iₓ in Rectangular HSS

HSS 16x12x3/8

Weight
68.3 lb/ft (+19%)
Depth
16.00 in (-11%)
Ix
702.0 in⁴ (+1.0%)
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Source: AISC Shapes Database v16.0 · Methodology