Steel Beam Sizes / AISC / HSS Round / HSS 18.000x0.250

HSS 18.000x0.250 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 18.000x0.250 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 47.44 lb/ft 70.60 kg/m
OD 18.000 in 457.000 mm
Nominal tw 0.250 in 6.350 mm
Design tw 0.233 in 5.920 mm
Area 13.00 in² 8,390.00 mm²
Ix 512.00 in⁴ 213,000,000 mm⁴
Iy 512.00 in⁴ 213,000,000 mm⁴
Sx 56.90 in³ 932,000.00 mm³
Sy 56.90 in³ 932,000.00 mm³
Zx 73.40 in³ 1,200,000 mm³
Zy 73.40 in³ 1,200,000 mm³
rx 6.28 in 160.00 mm
ry 6.28 in 160.00 mm
J 1,020.00 in⁴ 425,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18.000x0.250.

Lighter in Round HSS

HSS 12.000x0.375

Weight
46.6 lb/ft (-1.8%)
Depth
— in
Ix
217.0 in⁴ (-58%)

Heavier in Round HSS

HSS 9.625x0.500

Weight
48.8 lb/ft (+2.8%)
Depth
— in
Ix
141.0 in⁴ (-72%)

Closest Iₓ in Round HSS

HSS 16.000x0.375

Weight
62.6 lb/ft (+32%)
Depth
— in
Ix
526.0 in⁴ (+2.7%)
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Source: AISC Shapes Database v16.0 · Methodology