Steel Beam Sizes / AISC / MC Channels / MC18x51.9

MC18x51.9 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

MC18x51.9 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 51.90 lb/ft 77.20 kg/m
Depth, d 18.00 in 457.00 mm
Flange width, bf 4.10 in 104.00 mm
tw 0.600 in 15.200 mm
tf 0.625 in 15.900 mm
Area 15.30 in² 9,870.00 mm²
Ix 627.00 in⁴ 261,000,000 mm⁴
Iy 16.30 in⁴ 6,780,000 mm⁴
Sx 69.60 in³ 1,140,000 mm³
Sy 5.02 in³ 82,300.00 mm³
Zx 87.30 in³ 1,430,000 mm³
Zy 9.86 in³ 162,000.00 mm³
rx 6.41 in 163.00 mm
ry 1.03 in 26.20 mm
J 2.03 in⁴ 845,000.00 mm⁴
Cw 985.00 in⁶ 265,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC18x51.9.

Lighter in MC18

MC18x45.8

Weight
45.8 lb/ft (-12%)
Depth
18.00 in (0.0%)
Ix
578.0 in⁴ (-7.8%)

Heavier in MC18

MC18x58

Weight
58.0 lb/ft (+12%)
Depth
18.00 in (0.0%)
Ix
675.0 in⁴ (+7.7%)

Closest Iₓ in MC18

MC18x42.7

Weight
42.7 lb/ft (-18%)
Depth
18.00 in (0.0%)
Ix
554.0 in⁴ (-12%)

Similar weight in MC13

MC13x50

Weight
50.0 lb/ft (-3.7%)
Depth
13.00 in (-28%)
Ix
314.0 in⁴ (-50%)
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Source: AISC Shapes Database v16.0 · Methodology