MC12×40 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.

MC12×40 measures 12 in. deep with a 3 7/8 in. flange and a 9/16 in. web.

At 40 lb per foot it is one of the 7 MC12 sizes, which run from 10.6 to 50 lb/ft.

For strong-axis bending its section modulus is Sx = 39 in³ and its moment of inertia Ix = 234 in⁴, with a plastic modulus Zx = 47.7 in³.

Detailing dimensions

Depth (d)12"
Flange width (bf)3 7/8"
Web thickness (tw)9/16"
Avg flange thickness (tf)11/16"
k (detailing)1 5/16"

Section properties

Weight40 lb/ft
Area (A)11.8 in²
Ix234 in⁴
Sx39 in³
Zx47.7 in³
rx4.46 in
Iy14.2 in⁴
Sy4.98 in³
Zy9.31 in³
ry1.1 in
J1.69 in⁴

Other MC12 sizes

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

MC12×10.6MC12×14.3MC12×31MC12×35MC12×45MC12×50

Similar weight MC channels

Comparable 40 lb/ft sections in other MC channel sizes.

MC13×4040 lb/ft · Sx 41.9 in³MC10×41.141.1 lb/ft · Sx 31.5 in³MC18×42.742.7 lb/ft · Sx 61.5 in³MC13×3535 lb/ft · Sx 38.8 in³MC18×45.845.8 lb/ft · Sx 64.2 in³MC10×33.633.6 lb/ft · Sx 27.8 in³MC13×31.831.8 lb/ft · Sx 36.7 in³MC13×5050 lb/ft · Sx 48.3 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 MC12×40 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: MC channels · Steel Beam Size Chart

Interactive drawing