Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x4x5/16

HSS 20x4x5/16 Steel Beam Dimensions and Properties

AISC Rectangular HSS · v16.0

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

Units

Section diagram

HSS 20x4x5/16 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 48.86 lb/ft 72.70 kg/m
Height 20.00 in 508.00 mm
Width 4.00 in 102.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 13.40 in² 8,650.00 mm²
Ix 560.00 in⁴ 233,000,000 mm⁴
Iy 41.20 in⁴ 17,100,000 mm⁴
Sx 56.00 in³ 918,000.00 mm³
Sy 20.60 in³ 338,000.00 mm³
Zx 75.60 in³ 1,240,000 mm³
Zy 22.90 in³ 375,000.00 mm³
rx 6.46 in 164.00 mm
ry 1.75 in 44.50 mm
J 134.00 in⁴ 55,800,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x4x5/16.

Lighter in Rectangular HSS

HSS 10x6x1/2

Weight
48.9 lb/ft (0.0%)
Depth
10.00 in (-50%)
Ix
171.0 in⁴ (-69%)

Heavier in Rectangular HSS

HSS 10x4x5/8

Weight
50.8 lb/ft (+4.0%)
Depth
10.00 in (-50%)
Ix
149.0 in⁴ (-73%)

Closest Iₓ in Rectangular HSS

HSS 18x10x1/4

Weight
46.2 lb/ft (-5.4%)
Depth
18.00 in (-10%)
Ix
566.0 in⁴ (+1.1%)
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Source: AISC Shapes Database v16.0 · Methodology