Steel Beam Sizes / AISC / HSS Round / HSS 18.000x0.500

HSS 18.000x0.500 Steel Beam Dimensions and Properties

AISC Round HSS · v16.0

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

Units

Section diagram

HSS 18.000x0.500 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 93.54 lb/ft 139.00 kg/m
OD 18.000 in 457.000 mm
Nominal tw 0.500 in 12.700 mm
Design tw 0.465 in 11.800 mm
Area 25.60 in² 16,500.00 mm²
Ix 985.00 in⁴ 410,000,000 mm⁴
Iy 985.00 in⁴ 410,000,000 mm⁴
Sx 109.00 in³ 1,790,000 mm³
Sy 109.00 in³ 1,790,000 mm³
Zx 143.00 in³ 2,340,000 mm³
Zy 143.00 in³ 2,340,000 mm³
rx 6.20 in 157.00 mm
ry 6.20 in 157.00 mm
J 1,970.00 in⁴ 820,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18.000x0.500.

Lighter in Round HSS

HSS 14.000x0.625

Weight
89.4 lb/ft (-4.5%)
Depth
— in
Ix
552.0 in⁴ (-44%)

Heavier in Round HSS

HSS 24.000x0.375

Weight
94.7 lb/ft (+1.3%)
Depth
— in
Ix
1,810.0 in⁴ (+84%)

Closest Iₓ in Round HSS

HSS 16.000x0.750

Weight
122.3 lb/ft (+31%)
Depth
— in
Ix
984.0 in⁴ (-0.1%)
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Source: AISC Shapes Database v16.0 · Methodology