StructureCalcsW12X79
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W12X79 is a wide-flange beam 315.0 mm deep with a 307.3 mm wide flange, weighing 117.6 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
W-shapes are the American wide-flange family — the default beam and column of US practice, with parallel flanges and the widest range of depths in the AISC catalogue.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 315.0 mm | 12.40 in |
| Flange width, bf | 307.3 mm | 12.10 in |
| Flange thickness, tf | 18.7 mm | 0.735 in |
| Web thickness, tw | 11.9 mm | 0.470 in |
| Mass per metre | 117.6 kg/m | 79.0 lb/ft |
| Area, A | 14,968 mm² | 23.20 in² |
| Second moment, Ix | 275,545,204 mm⁴ | 662.0 in⁴ |
| Second moment, Iy | 89,905,988 mm⁴ | 216.0 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 W12X79 the computed area agrees with the published value to 0.01% and Ix to 0.44%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 1,757,442 mm³ |
| Elastic modulus, Sy | 588,205 mm³ |
| Plastic modulus, Zx | 1,954,321 mm³ |
| Plastic modulus, Zy | 893,294 mm³ |
| Radius of gyration, rx | 136.0 mm |
| Radius of gyration, ry | 77.7 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