MC18×58 MC channel

Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.

MC18×58 measures 18 in. deep with a 4 1/4 in. flange and a 11/16 in. web.

At 58 lb per foot it is the heaviest of the 4 MC18 sizes, which run from 42.7 to 58 lb/ft.

For strong-axis bending its section modulus is Sx = 75 in³ and its moment of inertia Ix = 675 in⁴, with a plastic modulus Zx = 95.4 in³.

Detailing dimensions

Depth (d)18"
Flange width (bf)4 1/4"
Web thickness (tw)11/16"
Avg flange thickness (tf)5/8"
k (detailing)1 7/16"

Section properties

Weight58 lb/ft
Area (A)17.1 in²
Ix675 in⁴
Sx75 in³
Zx95.4 in³
rx6.29 in
Iy17.6 in⁴
Sy5.28 in³
Zy10.7 in³
ry1.02 in
J2.81 in⁴

Other MC18 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

MC18×42.7MC18×45.8MC18×51.9

Similar weight MC channels

Comparable 58 lb/ft sections in other MC channel sizes.

MC13×5050 lb/ft · Sx 48.3 in³MC12×5050 lb/ft · Sx 44.9 in³MC12×4545 lb/ft · Sx 41.9 in³MC10×41.141.1 lb/ft · Sx 31.5 in³MC13×4040 lb/ft · Sx 41.9 in³MC12×4040 lb/ft · Sx 39 in³MC13×3535 lb/ft · Sx 38.8 in³MC12×3535 lb/ft · Sx 36 in³

Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need MC18×58 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: MC channels · Steel Beam Size Chart

Interactive drawing