Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x12x5/16

HSS 20x12x5/16 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 20x12x5/16 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 65.87 lb/ft 97.90 kg/m
Height 20.00 in 508.00 mm
Width 12.00 in 305.00 mm
Nominal tw 0.313 in 7.940 mm
Design tw 0.291 in 7.390 mm
Area 18.10 in² 11,700.00 mm²
Ix 1,010.00 in⁴ 420,000,000 mm⁴
Iy 464.00 in⁴ 193,000,000 mm⁴
Sx 101.00 in³ 1,660,000 mm³
Sy 77.30 in³ 1,270,000 mm³
Zx 122.00 in³ 2,000,000 mm³
Zy 85.80 in³ 1,410,000 mm³
rx 7.48 in 190.00 mm
ry 5.07 in 129.00 mm
J 997.00 in⁴ 415,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x12x5/16.

Lighter in Rectangular HSS

HSS 22x16x1/4

Weight
63.3 lb/ft (-4.0%)
Depth
22.00 in (+10%)
Ix
1,250.0 in⁴ (+24%)

Heavier in Rectangular HSS

HSS 10x8x5/8

Weight
67.8 lb/ft (+3.0%)
Depth
10.00 in (-50%)
Ix
253.0 in⁴ (-75%)

Closest Iₓ in Rectangular HSS

HSS 24x8x1/4

Weight
53.1 lb/ft (-19%)
Depth
24.00 in (+20%)
Ix
1,010.0 in⁴ (0.0%)
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Source: AISC Shapes Database v16.0 · Methodology