Steel Beam Sizes / AISC / HSS Round / HSS 12.750x0.500

HSS 12.750x0.500 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 12.750x0.500 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 65.48 lb/ft 97.40 kg/m
OD 12.800 in 324.000 mm
Nominal tw 0.500 in 12.700 mm
Design tw 0.465 in 11.800 mm
Area 17.90 in² 11,500.00 mm²
Ix 339.00 in⁴ 141,000,000 mm⁴
Iy 339.00 in⁴ 141,000,000 mm⁴
Sx 53.20 in³ 872,000.00 mm³
Sy 53.20 in³ 872,000.00 mm³
Zx 70.20 in³ 1,150,000 mm³
Zy 70.20 in³ 1,150,000 mm³
rx 4.35 in 110.00 mm
ry 4.35 in 110.00 mm
J 678.00 in⁴ 282,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 12.750x0.500.

Lighter in Round HSS

HSS 10.000x0.625

Weight
62.6 lb/ft (-4.3%)
Depth
— in
Ix
191.0 in⁴ (-44%)

Heavier in Round HSS

HSS 20.000x0.313

Weight
65.8 lb/ft (+0.4%)
Depth
— in
Ix
874.0 in⁴ (+158%)

Closest Iₓ in Round HSS

HSS 12.000x0.625

Weight
76.0 lb/ft (+16%)
Depth
— in
Ix
341.0 in⁴ (+0.6%)
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Source: AISC Shapes Database v16.0 · Methodology