C9×15 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.

C9×15 measures 9 in. deep with a 2 1/2 in. flange and a 5/16 in. web.

At 15 lb per foot it is one of the 3 C9 sizes, which run from 13.4 to 20 lb/ft.

For strong-axis bending its section modulus is Sx = 11.3 in³ and its moment of inertia Ix = 51 in⁴, with a plastic modulus Zx = 13.6 in³.

Detailing dimensions

Depth (d)9"
Flange width (bf)2 1/2"
Web thickness (tw)5/16"
Avg flange thickness (tf)7/16"
k (detailing)1"

Section properties

Weight15 lb/ft
Area (A)4.4 in²
Ix51 in⁴
Sx11.3 in³
Zx13.6 in³
rx3.4 in
Iy1.91 in⁴
Sy1.01 in³
Zy2.04 in³
ry0.659 in
J0.208 in⁴

Other C9 sizes

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

C9×13.4C9×20

Similar weight channels

Comparable 15 lb/ft sections in other channel sizes.

C7×14.7514.75 lb/ft · Sx 7.78 in³C10×15.315.3 lb/ft · Sx 13.5 in³C8×13.7513.75 lb/ft · Sx 9.02 in³C6×1313 lb/ft · Sx 5.78 in³C7×12.2512.25 lb/ft · Sx 6.92 in³C8×11.511.5 lb/ft · Sx 8.14 in³C8×18.7518.75 lb/ft · Sx 11 in³C6×10.510.5 lb/ft · Sx 5.04 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 C9×15 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Channels · Steel Beam Size Chart

Interactive drawing