Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x8x1/2

HSS 20x8x1/2 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 20x8x1/2 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 89.68 lb/ft 133.00 kg/m
Height 20.00 in 508.00 mm
Width 8.00 in 203.00 mm
Nominal tw 0.500 in 12.700 mm
Design tw 0.465 in 11.800 mm
Area 24.60 in² 15,900.00 mm²
Ix 1,190.00 in⁴ 495,000,000 mm⁴
Iy 283.00 in⁴ 118,000,000 mm⁴
Sx 119.00 in³ 1,950,000 mm³
Sy 70.80 in³ 1,160,000 mm³
Zx 152.00 in³ 2,490,000 mm³
Zy 79.50 in³ 1,300,000 mm³
rx 6.96 in 177.00 mm
ry 3.39 in 86.10 mm
J 757.00 in⁴ 315,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x8x1/2.

Lighter in Rectangular HSS

HSS 20x16x3/8

Weight
88.7 lb/ft (-1.1%)
Depth
20.00 in (0.0%)
Ix
1,470.0 in⁴ (+24%)

Heavier in Rectangular HSS

HSS 24x20x5/16

Weight
91.4 lb/ft (+1.9%)
Depth
24.00 in (+20%)
Ix
2,230.0 in⁴ (+87%)

Closest Iₓ in Rectangular HSS

HSS 20x12x3/8

Weight
78.5 lb/ft (-12%)
Depth
20.00 in (0.0%)
Ix
1,200.0 in⁴ (+0.8%)
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Source: AISC Shapes Database v16.0 · Methodology