C Shapes (Standard Channels): Sizes & Weights

Standard channels, C3 through C15, for stair stringers, lintels, framing, and bracing. 32 sizes from the AISC catalog, in lb/ft with kg/m alongside. Deeper reading: AISC Shape Database Guide.

C3 series

Designation	lb/ft	kg/m	Area (in²)
C3X3.5	3.5	5.2	1.03
C3X4.1	4.1	6.1	1.21
C3X5	5	7.4	1.47
C3X6	6	8.9	1.76

C4 series

Designation	lb/ft	kg/m	Area (in²)
C4X4.5	4.5	6.7	1.32
C4X5.4	5.4	8	1.59
C4X6.25	6.25	9.3	1.84
C4X7.25	7.25	10.8	2.13

C5 series

Designation	lb/ft	kg/m	Area (in²)
C5X6.7	6.7	10	1.97
C5X9	9	13.4	2.64

C6 series

Designation	lb/ft	kg/m	Area (in²)
C6X8.2	8.2	12.2	2.4
C6X10.5	10.5	15.6	3.09
C6X13	13	19.3	3.83

C7 series

Designation	lb/ft	kg/m	Area (in²)
C7X9.8	9.8	14.6	2.87
C7X12.25	12.25	18.2	3.6
C7X14.75	14.75	22	4.33

C8 series

Designation	lb/ft	kg/m	Area (in²)
C8X11.5	11.5	17.1	3.38
C8X13.75	13.75	20.5	4.04
C8X18.75	18.75	27.9	5.51

C9 series

Designation	lb/ft	kg/m	Area (in²)
C9X13.4	13.4	19.9	3.94
C9X15	15	22.3	4.41
C9X20	20	29.8	5.88

C10 series

Designation	lb/ft	kg/m	Area (in²)
C10X15.3	15.3	22.8	4.49
C10X20	20	29.8	5.88
C10X25	25	37.2	7.35
C10X30	30	44.6	8.82

C12 series

Designation	lb/ft	kg/m	Area (in²)
C12X20.7	20.7	30.8	6.09
C12X25	25	37.2	7.35
C12X30	30	44.6	8.82

C15 series

Designation	lb/ft	kg/m	Area (in²)
C15X33.9	33.9	50.4	9.96
C15X40	40	59.5	11.8
C15X50	50	74.4	14.7

Areas marked as computed on the individual size pages are derived from the tabulated weight and steel density rather than read from the section table.

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