W21X166
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W21X166 is a wide-flange beam 571.5 mm deep with a 315.0 mm flange, weighing 247.0 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 571.5 mm | 22.50 in |
| Flange width, bf | 315.0 mm | 12.40 in |
| Flange thickness, tf | 34.5 mm | 1.360 in |
| Web thickness, tw | 19.1 mm | 0.750 in |
| Mass per metre | 247.0 kg/m | 166.0 lb/ft |
| Area, A | 31,484 mm² | 48.80 in² |
| Second moment, Ix | 1,781,470,503 mm⁴ | 4,280.0 in⁴ |
| Second moment, Iy | 181,060,670 mm⁴ | 435.0 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 W21X166 the computed area agrees with the published value to better than 0.01% and Ix to 0.01%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 6,233,779 mm³ |
| Elastic modulus, Zy | 1,144,118 mm³ |
| Plastic modulus, Sx | 7,081,874 mm³ |
| Plastic modulus, Sy | 1,760,692 mm³ |
| Radius of gyration, rx | 237.9 mm |
| Radius of gyration, ry | 75.7 mm |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed — S is elastic and Z is plastic.
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