W40X278
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W40X278 is a wide-flange beam 1,021.1 mm deep with a 304.8 mm flange, weighing 413.7 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 | 1,021.1 mm | 40.20 in |
| Flange width, bf | 304.8 mm | 12.00 in |
| Flange thickness, tf | 46.0 mm | 1.810 in |
| Web thickness, tw | 26.2 mm | 1.030 in |
| Mass per metre | 413.7 kg/m | 278.0 lb/ft |
| Area, A | 53,097 mm² | 82.30 in² |
| Second moment, Ix | 8,532,744,233 mm⁴ | 20,500.0 in⁴ |
| Second moment, Iy | 216,856,573 mm⁴ | 521.0 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 W40X278 the computed area agrees with the published value to better than 0.01% and Ix to 0.51%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 16,797,738 mm³ |
| Elastic modulus, Zy | 1,434,804 mm³ |
| Plastic modulus, Sx | 19,660,292 mm³ |
| Plastic modulus, Sy | 2,309,503 mm³ |
| Radius of gyration, rx | 401.9 mm |
| Radius of gyration, ry | 64.2 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