Steel Beam Sizes / AISC / HSS Round / HSS 18.000x0.375

HSS 18.000x0.375 Steel Beam Dimensions and Properties

AISC Round HSS · v16.0

Analyze in Beam Calculator Back to HSS Round

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

Units

Section diagram

HSS 18.000x0.375 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 70.66 lb/ft 105.00 kg/m
OD 18.000 in 457.000 mm
Nominal tw 0.375 in 9.530 mm
Design tw 0.349 in 8.860 mm
Area 19.40 in² 12,500.00 mm²
Ix 754.00 in⁴ 314,000,000 mm⁴
Iy 754.00 in⁴ 314,000,000 mm⁴
Sx 83.80 in³ 1,370,000 mm³
Sy 83.80 in³ 1,370,000 mm³
Zx 109.00 in³ 1,790,000 mm³
Zy 109.00 in³ 1,790,000 mm³
rx 6.24 in 158.00 mm
ry 6.24 in 158.00 mm
J 1,510.00 in⁴ 629,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18.000x0.375.

Lighter in Round HSS

HSS 13.375x0.500

Weight
68.8 lb/ft (-2.6%)
Depth
— in
Ix
393.0 in⁴ (-48%)

Heavier in Round HSS

HSS 14.000x0.500

Weight
72.2 lb/ft (+2.1%)
Depth
— in
Ix
453.0 in⁴ (-40%)

Closest Iₓ in Round HSS

HSS 14.000x0.875

Weight
122.8 lb/ft (+74%)
Depth
— in
Ix
735.0 in⁴ (-2.5%)
Analyze in Beam Calculator Compare in HSS Round finder

Source: AISC Shapes Database v16.0 · Methodology