Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x4x1/2

HSS 20x4x1/2 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 20x4x1/2 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 76.07 lb/ft 113.00 kg/m
Height 20.00 in 508.00 mm
Width 4.00 in 102.00 mm
Nominal tw 0.500 in 12.700 mm
Design tw 0.465 in 11.800 mm
Area 20.90 in² 13,500.00 mm²
Ix 838.00 in⁴ 349,000,000 mm⁴
Iy 58.70 in⁴ 24,400,000 mm⁴
Sx 83.80 in³ 1,370,000 mm³
Sy 29.30 in³ 480,000.00 mm³
Zx 115.00 in³ 1,880,000 mm³
Zy 34.00 in³ 557,000.00 mm³
rx 6.33 in 161.00 mm
ry 1.68 in 42.70 mm
J 195.00 in⁴ 81,200,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x4x1/2.

Lighter in Rectangular HSS

HSS 20x16x5/16

Weight
74.4 lb/ft (-2.2%)
Depth
20.00 in (0.0%)
Ix
1,240.0 in⁴ (+48%)

Heavier in Rectangular HSS

HSS 12x8x5/8

Weight
76.3 lb/ft (+0.3%)
Depth
12.00 in (-40%)
Ix
397.0 in⁴ (-53%)

Closest Iₓ in Rectangular HSS

HSS 18x10x3/8

Weight
68.3 lb/ft (-10%)
Depth
18.00 in (-10%)
Ix
820.0 in⁴ (-2.1%)
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Source: AISC Shapes Database v16.0 · Methodology