Steel Beam Sizes / AISC / HSS Square / HSS 20x20x5/8

HSS 20x20x5/8 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 20x20x5/8 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 161.40 lb/ft 240.00 kg/m
Height 20.00 in 508.00 mm
Width 20.00 in 508.00 mm
Nominal tw 0.625 in 15.900 mm
Design tw 0.581 in 14.800 mm
Area 44.30 in² 28,600.00 mm²
Ix 2,750.00 in⁴ 1,140,000,000 mm⁴
Iy 2,750.00 in⁴ 1,140,000,000 mm⁴
Sx 275.00 in³ 4,510,000 mm³
Sy 275.00 in³ 4,510,000 mm³
Zx 320.00 in³ 5,240,000 mm³
Zy 320.00 in³ 5,240,000 mm³
rx 7.88 in 200.00 mm
ry 7.88 in 200.00 mm
J 4,320.00 in⁴ 1,800,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x20x5/8.

Lighter in Square HSS

HSS 16x16x3/4

Weight
150.8 lb/ft (-6.6%)
Depth
16.00 in (-20%)
Ix
1,590.0 in⁴ (-42%)

Heavier in Square HSS

HSS 14x14x1

Weight
168.2 lb/ft (+4.2%)
Depth
14.00 in (-30%)
Ix
1,290.0 in⁴ (-53%)

Closest Iₓ in Square HSS

HSS 18x18x7/8

Weight
197.2 lb/ft (+22%)
Depth
18.00 in (-10%)
Ix
2,630.0 in⁴ (-4.4%)
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Source: AISC Shapes Database v16.0 · Methodology