StructureCalcsW8X13
Wide-Flange Beam · AISC Shapes Database v15.0 · United States
W8X13 is a wide-flange beam 203.0 mm deep with a 101.6 mm wide flange, weighing 19.4 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 | 203.0 mm | 7.99 in |
| Flange width, bf | 101.6 mm | 4.00 in |
| Flange thickness, tf | 6.5 mm | 0.255 in |
| Web thickness, tw | 5.8 mm | 0.230 in |
| Mass per metre | 19.4 kg/m | 13.0 lb/ft |
| Area, A | 2,477 mm² | 3.84 in² |
| Second moment, Ix | 16,482,765 mm⁴ | 39.6 in⁴ |
| Second moment, Iy | 1,136,312 mm⁴ | 2.7 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 W8X13 the computed area agrees with the published value to 0.01% and Ix to 0.05%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 162,520 mm³ |
| Elastic modulus, Sy | 22,382 mm³ |
| Plastic modulus, Zx | 186,797 mm³ |
| Plastic modulus, Zy | 35,301 mm³ |
| Radius of gyration, rx | 81.6 mm |
| Radius of gyration, ry | 21.4 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