Steel Beam Sizes / AISC / HSS Rectangular / HSS 20x12x7/8

HSS 20x12x7/8 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 20x12x7/8 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 173.43 lb/ft 258.00 kg/m
Height 20.00 in 508.00 mm
Width 12.00 in 305.00 mm
Nominal tw 0.875 in 22.200 mm
Design tw 0.814 in 20.700 mm
Area 47.70 in² 30,800.00 mm²
Ix 2,480.00 in⁴ 1,030,000,000 mm⁴
Iy 1,110.00 in⁴ 462,000,000 mm⁴
Sx 248.00 in³ 4,060,000 mm³
Sy 186.00 in³ 3,050,000 mm³
Zx 308.00 in³ 5,050,000 mm³
Zy 216.00 in³ 3,540,000 mm³
rx 7.20 in 183.00 mm
ry 4.83 in 123.00 mm
J 2,530.00 in⁴ 1,050,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 20x12x7/8.

Lighter in Rectangular HSS

HSS 20x16x3/4

Weight
171.2 lb/ft (-1.3%)
Depth
20.00 in (0.0%)
Ix
2,710.0 in⁴ (+9.3%)

Heavier in Rectangular HSS

HSS 24x20x5/8

Weight
178.4 lb/ft (+2.9%)
Depth
24.00 in (+20%)
Ix
4,220.0 in⁴ (+70%)

Closest Iₓ in Rectangular HSS

HSS 24x18x3/8

Weight
104.0 lb/ft (-40%)
Depth
24.00 in (+20%)
Ix
2,450.0 in⁴ (-1.2%)
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Source: AISC Shapes Database v16.0 · Methodology