StructureCalcsW21X83
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W21X83 is a wide-flange beam 543.6 mm deep with a 212.3 mm wide flange, weighing 123.5 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 | 543.6 mm | 21.40 in |
| Flange width, bf | 212.3 mm | 8.36 in |
| Flange thickness, tf | 21.2 mm | 0.835 in |
| Web thickness, tw | 13.1 mm | 0.515 in |
| Mass per metre | 123.5 kg/m | 83.0 lb/ft |
| Area, A | 15,677 mm² | 24.30 in² |
| Second moment, Ix | 761,703,510 mm⁴ | 1,830.0 in⁴ |
| Second moment, Iy | 33,881,238 mm⁴ | 81.4 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 W21X83 the computed area agrees with the published value to better than 0.01% and Ix to 0.35%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 2,792,868 mm³ |
| Elastic modulus, Sy | 319,750 mm³ |
| Plastic modulus, Zx | 3,202,400 mm³ |
| Plastic modulus, Zy | 500,650 mm³ |
| Radius of gyration, rx | 220.0 mm |
| Radius of gyration, ry | 46.5 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