Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x8x5/8

HSS 20x8x5/8 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 20x8x5/8 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 110.36 lb/ft 164.00 kg/m
Height 20.00 in 508.00 mm
Width 8.00 in 203.00 mm
Nominal tw 0.625 in 15.900 mm
Design tw 0.581 in 14.800 mm
Area 30.30 in² 19,500.00 mm²
Ix 1,440.00 in⁴ 599,000,000 mm⁴
Iy 338.00 in⁴ 141,000,000 mm⁴
Sx 144.00 in³ 2,360,000 mm³
Sy 84.60 in³ 1,390,000 mm³
Zx 185.00 in³ 3,030,000 mm³
Zy 96.40 in³ 1,580,000 mm³
rx 6.89 in 175.00 mm
ry 3.34 in 84.80 mm
J 916.00 in⁴ 381,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x8x5/8.

Lighter in Rectangular HSS

HSS 14x10x3/4

Weight
109.9 lb/ft (-0.4%)
Depth
14.00 in (-30%)
Ix
792.0 in⁴ (-45%)

Heavier in Rectangular HSS

HSS 20x16x1/2

Weight
116.9 lb/ft (+5.9%)
Depth
20.00 in (0.0%)
Ix
1,900.0 in⁴ (+32%)

Closest Iₓ in Rectangular HSS

HSS 16x12x7/8

Weight
149.6 lb/ft (+36%)
Depth
16.00 in (-20%)
Ix
1,430.0 in⁴ (-0.7%)
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Source: AISC Shapes Database v16.0 · Methodology