MC12×31 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.

MC12×31 measures 12 in. deep with a 3 5/8 in. flange and a 3/8 in. web.

At 31 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 = 33.7 in³ and its moment of inertia Ix = 202 in⁴, with a plastic modulus Zx = 39.7 in³.

Detailing dimensions

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

Section properties

Weight31 lb/ft
Area (A)9.12 in²
Ix202 in⁴
Sx33.7 in³
Zx39.7 in³
rx4.71 in
Iy11.3 in⁴
Sy4.37 in³
Zy8.15 in³
ry1.11 in
J1 in⁴

Other MC12 sizes

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

MC12×10.6MC12×14.3MC12×35MC12×40MC12×45MC12×50

Similar weight MC channels

Comparable 31 lb/ft sections in other MC channel sizes.

MC13×31.831.8 lb/ft · Sx 36.7 in³MC10×28.528.5 lb/ft · Sx 25.3 in³MC10×33.633.6 lb/ft · Sx 27.8 in³MC13×3535 lb/ft · Sx 38.8 in³MC9×25.425.4 lb/ft · Sx 19.5 in³MC10×2525 lb/ft · Sx 22 in³MC9×23.923.9 lb/ft · Sx 18.9 in³MC8×22.822.8 lb/ft · Sx 15.9 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 MC12×31 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: MC channels · Steel Beam Size Chart

Interactive drawing