StructureCalcsC9X20
American Standard Channel · AISC Shapes Database v15.0 · United States
C9X20 is an American Standard channel 228.6 mm deep with a 67.3 mm wide flange, weighing 29.8 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
C-shapes are American Standard channels with tapered flanges — stringers, purlins and frames where a single flat back face is wanted.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 228.6 mm | 9.00 in |
| Flange width, bf | 67.3 mm | 2.65 in |
| Flange thickness, tf | 10.5 mm | 0.413 in |
| Web thickness, tw | 11.4 mm | 0.448 in |
| Mass per metre | 29.8 kg/m | 20.0 lb/ft |
| Area, A | 3,787 mm² | 5.87 in² |
| Second moment, Ix | 25,348,494 mm⁴ | 60.9 in⁴ |
| Second moment, Iy | 1,003,118 mm⁴ | 2.4 in⁴ |
Derived section properties
Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For C9X20 the computed area agrees with the published value to better than 0.01% and Ix to 0.08%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 221,596 mm³ |
| Elastic modulus, Sy | 19,413 mm³ |
| Plastic modulus, Zx | 277,432 mm³ |
| Plastic modulus, Zy | 40,579 mm³ |
| Radius of gyration, rx | 81.8 mm |
| Radius of gyration, ry | 16.4 mm |
S is the elastic modulus and Z the plastic modulus, following AISC 360. Australian and British practice reverse the letters.
Neighbouring sizes
Where these numbers come from
Published AISC Shapes Database v15.0 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API