Steel Beam Sizes / Australia / Universal Beams / 180 UB 18

180 UB 18 Steel Beam Dimensions and Properties

ASNZS Universal beams · v2019.11

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

Units

Section diagram

180 UB 18 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 12.10 lb/ft 18.00 kg/m
Depth, d 6.89 in 175.00 mm
Flange width, bf 3.54 in 90.00 mm
tw 0.197 in 5.000 mm
tf 0.315 in 8.000 mm
Area 3.57 in² 2,300.00 mm²
Ix 29.07 in⁴ 12,100,000 mm⁴
Iy 2.34 in⁴ 975,000.00 mm⁴
Sx 8.44 in³ 138,285.71 mm³
Sy 1.32 in³ 21,666.67 mm³
Zx 9.58 in³ 157,000.00 mm³
Zy 2.06 in³ 33,700.00 mm³
rx 2.86 in 72.53 mm
ry 0.81 in 20.59 mm
J 0.11 in⁴ 45,000.00 mm⁴
Cw 25.43 in⁶ 6,830,000,128 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus 180 UB 18.

Lighter in Universal beams

150 UB 14

Weight
14.0 kg/m (-22%)
Depth
150.0 mm (-14%)
Ix
6,660,000 mm⁴ (-45%)

Heavier in Universal beams

180 UB 22

Weight
22.0 kg/m (+22%)
Depth
179.0 mm (+2.3%)
Ix
15,300,000 mm⁴ (+26%)

Closest Iₓ in Universal beams

150 UB 18

Weight
18.0 kg/m (0.0%)
Depth
155.0 mm (-11%)
Ix
9,050,000 mm⁴ (-25%)
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Source: Australian-Sections.xlsx (Sheets 1-19) · v2019.11 · Methodology