W18X258
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W18X258 is a wide-flange beam 546.1 mm deep with a 299.7 mm flange, weighing 383.9 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 | 546.1 mm | 21.50 in |
| Flange width, bf | 299.7 mm | 11.80 in |
| Flange thickness, tf | 58.4 mm | 2.300 in |
| Web thickness, tw | 32.5 mm | 1.280 in |
| Mass per metre | 383.9 kg/m | 258.0 lb/ft |
| Area, A | 49,032 mm² | 76.00 in² |
| Second moment, Ix | 2,293,435,157 mm⁴ | 5,510.0 in⁴ |
| Second moment, Iy | 261,393,336 mm⁴ | 628.0 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 W18X258 the computed area agrees with the published value to better than 0.01% and Ix to 0.68%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 8,456,458 mm³ |
| Elastic modulus, Zy | 1,757,659 mm³ |
| Plastic modulus, Sx | 10,048,992 mm³ |
| Plastic modulus, Sy | 2,738,460 mm³ |
| Radius of gyration, rx | 217.0 mm |
| Radius of gyration, ry | 73.3 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