Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x12x3/8

HSS 20x12x3/8 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 20x12x3/8 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 78.52 lb/ft 117.00 kg/m
Height 20.00 in 508.00 mm
Width 12.00 in 305.00 mm
Nominal tw 0.375 in 9.530 mm
Design tw 0.349 in 8.860 mm
Area 21.50 in² 13,900.00 mm²
Ix 1,200.00 in⁴ 499,000,000 mm⁴
Iy 547.00 in⁴ 228,000,000 mm⁴
Sx 120.00 in³ 1,970,000 mm³
Sy 91.10 in³ 1,490,000 mm³
Zx 144.00 in³ 2,360,000 mm³
Zy 102.00 in³ 1,670,000 mm³
rx 7.45 in 189.00 mm
ry 5.04 in 128.00 mm
J 1,180.00 in⁴ 491,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x12x3/8.

Lighter in Rectangular HSS

HSS 12x8x5/8

Weight
76.3 lb/ft (-2.8%)
Depth
12.00 in (-40%)
Ix
397.0 in⁴ (-67%)

Heavier in Rectangular HSS

HSS 22x16x5/16

Weight
78.6 lb/ft (+0.1%)
Depth
22.00 in (+10%)
Ix
1,550.0 in⁴ (+29%)

Closest Iₓ in Rectangular HSS

HSS 20x8x1/2

Weight
89.7 lb/ft (+14%)
Depth
20.00 in (0.0%)
Ix
1,190.0 in⁴ (-0.8%)
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Source: AISC Shapes Database v16.0 · Methodology