Steel Beam Sizes / AISC / HSS Square / HSS 20x20x1/2

HSS 20x20x1/2 Steel Beam Dimensions and Properties

AISC Square HSS · v16.0

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

Units

Section diagram

HSS 20x20x1/2 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 130.52 lb/ft 194.00 kg/m
Height 20.00 in 508.00 mm
Width 20.00 in 508.00 mm
Nominal tw 0.500 in 12.700 mm
Design tw 0.465 in 11.800 mm
Area 35.80 in² 23,100.00 mm²
Ix 2,260.00 in⁴ 941,000,000 mm⁴
Iy 2,260.00 in⁴ 941,000,000 mm⁴
Sx 226.00 in³ 3,700,000 mm³
Sy 226.00 in³ 3,700,000 mm³
Zx 261.00 in³ 4,280,000 mm³
Zy 261.00 in³ 4,280,000 mm³
rx 7.95 in 202.00 mm
ry 7.95 in 202.00 mm
J 3,510.00 in⁴ 1,460,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x20x1/2.

Lighter in Square HSS

HSS 14x14x3/4

Weight
130.3 lb/ft (-0.1%)
Depth
14.00 in (-30%)
Ix
1,040.0 in⁴ (-54%)

Heavier in Square HSS

HSS 12x12x1

Weight
141.0 lb/ft (+8.0%)
Depth
12.00 in (-40%)
Ix
772.0 in⁴ (-66%)

Closest Iₓ in Square HSS

HSS 18x18x3/4

Weight
171.2 lb/ft (+31%)
Depth
18.00 in (-10%)
Ix
2,320.0 in⁴ (+2.7%)
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Source: AISC Shapes Database v16.0 · Methodology