Source: https://www.quantumsteeldesign.com/steel-tools/shapes/c/ 32 AISC v16.0 records # AISC American Standard channels (C). A C-shape is a hot-rolled channel with one web and two flanges on the same side. Its singly symmetric, open geometry makes orientation, eccentricity, and torsion important considerations. ## Common context Common project roles include stair framing, edge members, lintels, equipment supports, girts, headers, and built-up or back-to-back framing. ## Detailing watch Check toe direction, gage and bolt access, flange slope where applicable, connection eccentricity, web orientation, and whether paired channels require separation or intermediate connectors. Use the directory as a reference ## How to read the C records The C designation carries a depth series and nominal weight per foot. Use actual flange width, web thickness and the detailing fields when checking the physical reference envelope. Channels are open sections with a toe direction. Preserve the database centroid and shear-center conventions; a mirrored channel changes how that geometry relates to a project model. This dataset contains 32 C records, with nominal weights from 3.5 to 50 lb/ft and listed depth values from 3 to 15 in. These ranges describe the published records, not current supplier inventory or a selection recommendation. Start with the exact designation, open its full record, then compare only the dimensions and properties relevant to your task. For example, [C15X40](https://www.quantumsteeldesign.com/steel-tools/shapes/c15x40/) lists 40 lb/ft, 11.8 in² area, Ix = 348 in⁴ and Iy = 9.17 in⁴. The x and y labels retain the database axes; their values do not establish allowable loads. The [AISC v16.0 workbook Readme](https://www.aisc.org/aisc/publications/steel-construction-manual/aisc-shapes-database-v160/) defines the variables and shape figures. This directory uses the US customary record; the comparison tool converts displayed units. Check the required edition and product specification before transferring data. Worked quantity example ## Nominal weight for C15X40 Assume 3 pieces, each 20 ft (6.096 m) long. This is a hypothetical quantity example, not a stock-length or lifting recommendation. | Quantity | Calculation | Nominal pounds | Kilogram equivalent | | --- | --- | --- | --- | | One 20 ft piece | 20 ft × 40 lb/ft | 800 lb | 362.874 kg | | 3 pieces | 3 × 800 lb | 2,400 lb | 1,088.622 kg | Conversion: 1 lb = 0.45359237 kg; displayed results are rounded. This multiplication excludes connection plates, bolts, weld metal, coatings, cutting allowances and actual material variation. Use the [material takeoff](https://www.quantumsteeldesign.com/material-takeoff/) for your own lengths and quantities. Crawlable designation index ## All C shape records. [View all shape families](https://www.quantumsteeldesign.com/steel-tools/shapes/) Filter by designation Showing all 32 records. | Designation | Weight | Depth / OD / d | Area | X-axis Sx | | --- | --- | --- | --- | --- | | C15X50 | 50 lb/ft | 15 in | 14.7 in² | 53.8 in³ | | C15X40 | 40 lb/ft | 15 in | 11.8 in² | 46.5 in³ | | C15X33.9 | 33.9 lb/ft | 15 in | 10 in² | 42 in³ | | C12X30 | 30 lb/ft | 12 in | 8.81 in² | 27 in³ | | C12X25 | 25 lb/ft | 12 in | 7.34 in² | 24 in³ | | C12X20.7 | 20.7 lb/ft | 12 in | 6.08 in² | 21.5 in³ | | C10X30 | 30 lb/ft | 10 in | 8.81 in² | 20.7 in³ | | C10X25 | 25 lb/ft | 10 in | 7.35 in² | 18.2 in³ | | C10X20 | 20 lb/ft | 10 in | 5.87 in² | 15.8 in³ | | C10X15.3 | 15.3 lb/ft | 10 in | 4.48 in² | 13.5 in³ | | C9X20 | 20 lb/ft | 9 in | 5.87 in² | 13.5 in³ | | C9X15 | 15 lb/ft | 9 in | 4.4 in² | 11.3 in³ | | C9X13.4 | 13.4 lb/ft | 9 in | 3.94 in² | 10.6 in³ | | C8X18.75 | 18.75 lb/ft | 8 in | 5.51 in² | 11 in³ | | C8X13.75 | 13.75 lb/ft | 8 in | 4.03 in² | 9.02 in³ | | C8X11.5 | 11.5 lb/ft | 8 in | 3.37 in² | 8.14 in³ | | C7X14.75 | 14.75 lb/ft | 7 in | 4.33 in² | 7.78 in³ | | C7X12.25 | 12.25 lb/ft | 7 in | 3.59 in² | 6.92 in³ | | C7X9.8 | 9.8 lb/ft | 7 in | 2.87 in² | 6.07 in³ | | C6X13 | 13 lb/ft | 6 in | 3.82 in² | 5.78 in³ | | C6X10.5 | 10.5 lb/ft | 6 in | 3.07 in² | 5.04 in³ | | C6X8.2 | 8.2 lb/ft | 6 in | 2.39 in² | 4.35 in³ | | C5X9 | 9 lb/ft | 5 in | 2.64 in² | 3.56 in³ | | C5X6.7 | 6.7 lb/ft | 5 in | 1.97 in² | 2.99 in³ | | C4X7.25 | 7.25 lb/ft | 4 in | 2.13 in² | 2.29 in³ | | C4X6.25 | 6.25 lb/ft | 4 in | 1.84 in² | 2.1 in³ | | C4X5.4 | 5.4 lb/ft | 4 in | 1.58 in² | 1.92 in³ | | C4X4.5 | 4.5 lb/ft | 4 in | 1.34 in² | 1.77 in³ | | C3X6 | 6 lb/ft | 3 in | 1.76 in² | 1.38 in³ | | C3X5 | 5 lb/ft | 3 in | 1.47 in² | 1.23 in³ | | C3X4.1 | 4.1 lb/ft | 3 in | 1.2 in² | 1.1 in³ | | C3X3.5 | 3.5 lb/ft | 3 in | 1.09 in² | 1.04 in³ | Reference use only. Values are derived from the [AISC Shapes Database v16.0](https://www.aisc.org/aisc/publications/steel-construction-manual/aisc-shapes-database-v160/) in US customary units. Open a designation for its full property table, nominal profile, downloads, source notes, and limitations.