C3 Channel Sizes

The C3 series runs 4 sizes, from C3x6 at 6 lb/ft to C3x3.5 at 3.5 lb/ft. They share a nominal depth, so the sizes in it differ mainly in web thickness and in how far the flange reaches.

C3 sizes, heaviest first

Sizelb/ftd (in)bf (in)A (in²)Ix (in⁴)Sx (in³)Zx (in³)
C3x6631.61.762.071.381.74
C3x5531.51.471.851.231.52
C3x4.14.131.411.21.651.11.32
C3x3.53.531.371.091.571.041.24

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