Steel Beam Sizes / AISC / HSS Rectangular / HSS 18x6x3/8

HSS 18x6x3/8 Steel Beam Dimensions and Properties

AISC Rectangular HSS · v16.0

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

Units

Section diagram

HSS 18x6x3/8 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 58.10 lb/ft 86.40 kg/m
Height 18.00 in 457.00 mm
Width 6.00 in 152.00 mm
Nominal tw 0.375 in 9.530 mm
Design tw 0.349 in 8.860 mm
Area 16.00 in² 10,300.00 mm²
Ix 602.00 in⁴ 251,000,000 mm⁴
Iy 106.00 in⁴ 44,100,000 mm⁴
Sx 66.90 in³ 1,100,000 mm³
Sy 35.50 in³ 582,000.00 mm³
Zx 86.40 in³ 1,420,000 mm³
Zy 39.50 in³ 647,000.00 mm³
rx 6.15 in 156.00 mm
ry 2.58 in 65.50 mm
J 302.00 in⁴ 126,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18x6x3/8.

Lighter in Rectangular HSS

HSS 16x12x5/16

Weight
57.4 lb/ft (-1.3%)
Depth
16.00 in (-11%)
Ix
595.0 in⁴ (-1.2%)

Heavier in Rectangular HSS

HSS 10x6x5/8

Weight
59.3 lb/ft (+2.1%)
Depth
10.00 in (-44%)
Ix
201.0 in⁴ (-67%)

Closest Iₓ in Rectangular HSS

HSS 18x8x5/16

Weight
53.1 lb/ft (-8.6%)
Depth
18.00 in (0.0%)
Ix
604.0 in⁴ (+0.3%)
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Source: AISC Shapes Database v16.0 · Methodology