StructureCalcsW12X87
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W12X87 is a wide-flange beam 317.5 mm deep with a 307.3 mm wide flange, weighing 129.5 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 | 317.5 mm | 12.50 in |
| Flange width, bf | 307.3 mm | 12.10 in |
| Flange thickness, tf | 20.6 mm | 0.810 in |
| Web thickness, tw | 13.1 mm | 0.515 in |
| Mass per metre | 129.5 kg/m | 87.0 lb/ft |
| Area, A | 16,516 mm² | 25.60 in² |
| Second moment, Ix | 308,011,255 mm⁴ | 740.0 in⁴ |
| Second moment, Iy | 100,311,774 mm⁴ | 241.0 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 W12X87 the computed area agrees with the published value to better than 0.01% and Ix to 0.40%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 1,932,514 mm³ |
| Elastic modulus, Sy | 648,200 mm³ |
| Plastic modulus, Zx | 2,161,440 mm³ |
| Plastic modulus, Zy | 985,993 mm³ |
| Radius of gyration, rx | 136.3 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