W12X40
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W12X40 is a wide-flange beam 302.3 mm deep with a 203.5 mm flange, weighing 59.5 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 | 302.3 mm | 11.90 in |
| Flange width, bf | 203.5 mm | 8.01 in |
| Flange thickness, tf | 13.1 mm | 0.515 in |
| Web thickness, tw | 7.5 mm | 0.295 in |
| Mass per metre | 59.5 kg/m | 40.0 lb/ft |
| Area, A | 7,548 mm² | 11.70 in² |
| Second moment, Ix | 127,783,048 mm⁴ | 307.0 in⁴ |
| Second moment, Iy | 18,355,806 mm⁴ | 44.1 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 W12X40 the computed area agrees with the published value to 0.01% and Ix to 0.32%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 842,828 mm³ |
| Elastic modulus, Zy | 180,646 mm³ |
| Plastic modulus, Sx | 933,723 mm³ |
| Plastic modulus, Sy | 275,652 mm³ |
| Radius of gyration, rx | 129.9 mm |
| Radius of gyration, ry | 49.3 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