Steel Beam Sizes / AISC / HSS Square / HSS 20x20x5/16

HSS 20x20x5/16 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 20x20x5/16 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 82.88 lb/ft 123.00 kg/m
Height 20.00 in 508.00 mm
Width 20.00 in 508.00 mm
Nominal tw 0.313 in 7.950 mm
Design tw 0.291 in 7.390 mm
Area 22.70 in² 14,600.00 mm²
Ix 1,460.00 in⁴ 608,000,000 mm⁴
Iy 1,460.00 in⁴ 608,000,000 mm⁴
Sx 146.00 in³ 2,390,000 mm³
Sy 146.00 in³ 2,390,000 mm³
Zx 167.00 in³ 2,740,000 mm³
Zy 167.00 in³ 2,740,000 mm³
rx 8.03 in 204.00 mm
ry 8.03 in 204.00 mm
J 2,250.00 in⁴ 937,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x20x5/16.

Lighter in Square HSS

HSS 16x16x3/8

Weight
78.5 lb/ft (-5.3%)
Depth
16.00 in (-20%)
Ix
873.0 in⁴ (-40%)

Heavier in Square HSS

HSS 18x18x3/8

Weight
88.7 lb/ft (+7.1%)
Depth
18.00 in (-10%)
Ix
1,250.0 in⁴ (-14%)

Closest Iₓ in Square HSS

HSS 16x16x5/8

Weight
127.4 lb/ft (+54%)
Depth
16.00 in (-20%)
Ix
1,370.0 in⁴ (-6.2%)
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Source: AISC Shapes Database v16.0 · Methodology