Steel Beam Sizes / AISC / MC Channels / MC18x42.7

MC18x42.7 Steel Beam Dimensions and Properties

AISC Miscellaneous channels · v16.0

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

Units

Section diagram

MC18x42.7 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 42.70 lb/ft 63.50 kg/m
Depth, d 18.00 in 457.00 mm
Flange width, bf 3.95 in 100.00 mm
tw 0.450 in 11.400 mm
tf 0.625 in 15.900 mm
Area 12.60 in² 8,130.00 mm²
Ix 554.00 in⁴ 231,000,000 mm⁴
Iy 14.30 in⁴ 5,950,000 mm⁴
Sx 61.50 in³ 1,010,000 mm³
Sy 4.64 in³ 76,000.00 mm³
Zx 75.10 in³ 1,230,000 mm³
Zy 8.82 in³ 145,000.00 mm³
rx 6.64 in 169.00 mm
ry 1.07 in 27.20 mm
J 1.23 in⁴ 512,000.00 mm⁴
Cw 852.00 in⁶ 229,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC18x42.7.

Heavier in MC18

MC18x45.8

Weight
45.8 lb/ft (+7.3%)
Depth
18.00 in (0.0%)
Ix
578.0 in⁴ (+4.3%)

Closest Iₓ in MC18

MC18x51.9

Weight
51.9 lb/ft (+22%)
Depth
18.00 in (0.0%)
Ix
627.0 in⁴ (+13%)

Similar weight in MC13

MC13x40

Weight
40.0 lb/ft (-6.3%)
Depth
13.00 in (-28%)
Ix
273.0 in⁴ (-51%)
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Source: AISC Shapes Database v16.0 · Methodology