Steel Beam Sizes / AISC / HSS Square / HSS 20x20x3/4

HSS 20x20x3/4 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 20x20x3/4 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 191.58 lb/ft 285.00 kg/m
Height 20.00 in 508.00 mm
Width 20.00 in 508.00 mm
Nominal tw 0.750 in 19.100 mm
Design tw 0.698 in 17.700 mm
Area 52.60 in² 33,900.00 mm²
Ix 3,230.00 in⁴ 1,340,000,000 mm⁴
Iy 3,230.00 in⁴ 1,340,000,000 mm⁴
Sx 323.00 in³ 5,290,000 mm³
Sy 323.00 in³ 5,290,000 mm³
Zx 378.00 in³ 6,200,000 mm³
Zy 378.00 in³ 6,200,000 mm³
rx 7.84 in 199.00 mm
ry 7.84 in 199.00 mm
J 5,110.00 in⁴ 2,130,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x20x3/4.

Lighter in Square HSS

HSS 22x22x5/8

Weight
178.4 lb/ft (-6.9%)
Depth
22.00 in (+10%)
Ix
3,710.0 in⁴ (+15%)

Heavier in Square HSS

HSS 16x16x1

Weight
195.4 lb/ft (+2.0%)
Depth
16.00 in (-20%)
Ix
1,990.0 in⁴ (-38%)

Closest Iₓ in Square HSS

HSS 22x22x1/2

Weight
144.1 lb/ft (-25%)
Depth
22.00 in (+10%)
Ix
3,030.0 in⁴ (-6.2%)
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Source: AISC Shapes Database v16.0 · Methodology