MC6×18 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.

MC6×18 measures 6 in. deep with a 3 1/2 in. flange and a 3/8 in. web.

At 18 lb per foot it is the heaviest of the 7 MC6 sizes, which run from 6.5 to 18 lb/ft.

For strong-axis bending its section modulus is Sx = 9.89 in³ and its moment of inertia Ix = 29.7 in⁴, with a plastic modulus Zx = 11.7 in³.

Detailing dimensions

Depth (d)6"
Flange width (bf)3 1/2"
Web thickness (tw)3/8"
Avg flange thickness (tf)1/2"
k (detailing)1 1/16"

Section properties

Weight18 lb/ft
Area (A)5.29 in²
Ix29.7 in⁴
Sx9.89 in³
Zx11.7 in³
rx2.37 in
Iy5.88 in⁴
Sy2.47 in³
Zy4.68 in³
ry1.05 in
J0.379 in⁴

Other MC6 sizes

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

MC6×6.5MC6×7MC6×12MC6×15.1MC6×15.3MC6×16.3

Similar weight MC channels

Comparable 18 lb/ft sections in other MC channel sizes.

MC8×18.718.7 lb/ft · Sx 13.1 in³MC7×19.119.1 lb/ft · Sx 12.3 in³MC8×2020 lb/ft · Sx 13.6 in³MC8×21.421.4 lb/ft · Sx 15.4 in³MC12×14.314.3 lb/ft · Sx 12.7 in³MC10×2222 lb/ft · Sx 20.5 in³MC4×13.813.8 lb/ft · Sx 4.43 in³MC7×22.722.7 lb/ft · Sx 13.5 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 MC6×18 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: MC channels · Steel Beam Size Chart

Interactive drawing