Steel Beam Sizes / AISC / MC Channels / MC18x45.8

MC18x45.8 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

MC18x45.8 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 45.80 lb/ft 68.20 kg/m
Depth, d 18.00 in 457.00 mm
Flange width, bf 4.00 in 102.00 mm
tw 0.500 in 12.700 mm
tf 0.625 in 15.900 mm
Area 13.50 in² 8,710.00 mm²
Ix 578.00 in⁴ 241,000,000 mm⁴
Iy 14.90 in⁴ 6,200,000 mm⁴
Sx 64.20 in³ 1,050,000 mm³
Sy 4.77 in³ 78,200.00 mm³
Zx 79.20 in³ 1,300,000 mm³
Zy 9.14 in³ 150,000.00 mm³
rx 6.55 in 166.00 mm
ry 1.05 in 26.70 mm
J 1.45 in⁴ 604,000.00 mm⁴
Cw 897.00 in⁶ 241,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus MC18x45.8.

Lighter in MC18

MC18x42.7

Weight
42.7 lb/ft (-6.8%)
Depth
18.00 in (0.0%)
Ix
554.0 in⁴ (-4.2%)

Heavier in MC18

MC18x51.9

Weight
51.9 lb/ft (+13%)
Depth
18.00 in (0.0%)
Ix
627.0 in⁴ (+8.5%)

Closest Iₓ in MC18

MC18x58

Weight
58.0 lb/ft (+27%)
Depth
18.00 in (0.0%)
Ix
675.0 in⁴ (+17%)

Similar weight in MC13

MC13x50

Weight
50.0 lb/ft (+9.2%)
Depth
13.00 in (-28%)
Ix
314.0 in⁴ (-46%)
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Source: AISC Shapes Database v16.0 · Methodology