Steel Beam Sizes / AISC / HSS Square / HSS 20x20x3/8

HSS 20x20x3/8 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 20x20x3/8 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 98.94 lb/ft 147.00 kg/m
Height 20.00 in 508.00 mm
Width 20.00 in 508.00 mm
Nominal tw 0.375 in 9.530 mm
Design tw 0.349 in 8.860 mm
Area 27.10 in² 17,500.00 mm²
Ix 1,740.00 in⁴ 724,000,000 mm⁴
Iy 1,740.00 in⁴ 724,000,000 mm⁴
Sx 174.00 in³ 2,850,000 mm³
Sy 174.00 in³ 2,850,000 mm³
Zx 199.00 in³ 3,260,000 mm³
Zy 199.00 in³ 3,260,000 mm³
rx 8.00 in 203.00 mm
ry 8.00 in 203.00 mm
J 2,680.00 in⁴ 1,120,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x20x3/8.

Lighter in Square HSS

HSS 12x12x5/8

Weight
93.3 lb/ft (-5.7%)
Depth
12.00 in (-40%)
Ix
548.0 in⁴ (-69%)

Heavier in Square HSS

HSS 16x16x1/2

Weight
103.3 lb/ft (+4.4%)
Depth
16.00 in (-20%)
Ix
1,130.0 in⁴ (-35%)

Closest Iₓ in Square HSS

HSS 16x16x7/8

Weight
173.4 lb/ft (+75%)
Depth
16.00 in (-20%)
Ix
1,800.0 in⁴ (+3.4%)
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Source: AISC Shapes Database v16.0 · Methodology