Steel Beam Sizes / AISC / HSS Round / HSS 18.000x1.000

HSS 18.000x1.000 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 18.000x1.000 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 181.73 lb/ft 270.00 kg/m
OD 18.000 in 457.000 mm
Nominal tw 1.000 in 25.400 mm
Design tw 0.930 in 23.600 mm
Area 49.90 in² 32,200.00 mm²
Ix 1,820.00 in⁴ 758,000,000 mm⁴
Iy 1,820.00 in⁴ 758,000,000 mm⁴
Sx 202.00 in³ 3,310,000 mm³
Sy 202.00 in³ 3,310,000 mm³
Zx 271.00 in³ 4,440,000 mm³
Zy 271.00 in³ 4,440,000 mm³
rx 6.04 in 153.00 mm
ry 6.04 in 153.00 mm
J 3,640.00 in⁴ 1,520,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18.000x1.000.

Lighter in Round HSS

HSS 20.000x0.875

Weight
178.9 lb/ft (-1.6%)
Depth
— in
Ix
2,260.0 in⁴ (+24%)

Heavier in Round HSS

HSS 28.000x0.625

Weight
182.9 lb/ft (+0.6%)
Depth
— in
Ix
4,710.0 in⁴ (+159%)

Closest Iₓ in Round HSS

HSS 22.000x0.500

Weight
114.9 lb/ft (-37%)
Depth
— in
Ix
1,820.0 in⁴ (0.0%)
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Source: AISC Shapes Database v16.0 · Methodology