C15×40 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.

C15×40 measures 15 in. deep with a 3 1/2 in. flange and a 1/2 in. web.

At 40 lb per foot it is one of the 3 C15 sizes, which run from 33.9 to 50 lb/ft.

For strong-axis bending its section modulus is Sx = 46.5 in³ and its moment of inertia Ix = 348 in⁴, with a plastic modulus Zx = 57.5 in³.

Detailing dimensions

Depth (d)15"
Flange width (bf)3 1/2"
Web thickness (tw)1/2"
Avg flange thickness (tf)5/8"
k (detailing)1 7/16"

Section properties

Weight40 lb/ft
Area (A)11.8 in²
Ix348 in⁴
Sx46.5 in³
Zx57.5 in³
rx5.43 in
Iy9.17 in⁴
Sy3.34 in³
Zy6.84 in³
ry0.883 in
J1.45 in⁴

Other C15 sizes

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

C15×33.9C15×50

Similar weight channels

Comparable 40 lb/ft sections in other channel sizes.

C12×3030 lb/ft · Sx 27 in³C10×3030 lb/ft · Sx 20.7 in³C12×2525 lb/ft · Sx 24 in³C10×2525 lb/ft · Sx 18.2 in³C12×20.720.7 lb/ft · Sx 21.5 in³C10×2020 lb/ft · Sx 15.8 in³C9×2020 lb/ft · Sx 13.5 in³C8×18.7518.75 lb/ft · Sx 11 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 C15×40 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Channels · Steel Beam Size Chart

Interactive drawing