Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x8x5/16

HSS 20x8x5/16 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 20x8x5/16 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 57.36 lb/ft 85.30 kg/m
Height 20.00 in 508.00 mm
Width 8.00 in 203.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 15.70 in² 10,100.00 mm²
Ix 786.00 in⁴ 327,000,000 mm⁴
Iy 189.00 in⁴ 78,700,000 mm⁴
Sx 78.60 in³ 1,290,000 mm³
Sy 47.40 in³ 777,000.00 mm³
Zx 98.60 in³ 1,620,000 mm³
Zy 52.00 in³ 852,000.00 mm³
rx 7.07 in 180.00 mm
ry 3.47 in 88.10 mm
J 496.00 in⁴ 206,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x8x5/16.

Lighter in Rectangular HSS

HSS 10x8x1/2

Weight
55.7 lb/ft (-3.0%)
Depth
10.00 in (-50%)
Ix
214.0 in⁴ (-73%)

Heavier in Rectangular HSS

HSS 14x10x3/8

Weight
58.1 lb/ft (+1.3%)
Depth
14.00 in (-30%)
Ix
447.0 in⁴ (-43%)

Closest Iₓ in Rectangular HSS

HSS 14x10x3/4

Weight
109.9 lb/ft (+92%)
Depth
14.00 in (-30%)
Ix
792.0 in⁴ (+0.8%)
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Source: AISC Shapes Database v16.0 · Methodology