W18 Beam Sizes
The W18 series runs 23 sizes, from W18x311 at 311 lb/ft to W18x35 at 35 lb/ft. They share a nominal depth and a common set of rolls, so a size change within the series usually keeps the connection detail intact.
W18 sizes, heaviest first
| Size | lb/ft | d (in) | A (in²) | Ix (in⁴) | Sx (in³) | Zx (in³) |
|---|---|---|---|---|---|---|
| W18x311 | 311 | 22.3 | 91.6 | 6,970 | 624 | 754 |
| W18x283 | 283 | 21.9 | 83.3 | 6,170 | 565 | 676 |
| W18x258 | 258 | 21.5 | 76 | 5,510 | 514 | 611 |
| W18x234 | 234 | 21.1 | 68.6 | 4,900 | 466 | 549 |
| W18x211 | 211 | 20.7 | 62.3 | 4,330 | 419 | 490 |
| W18x192 | 192 | 20.4 | 56.2 | 3,870 | 380 | 442 |
| W18x175 | 175 | 20 | 51.4 | 3,450 | 344 | 398 |
| W18x158 | 158 | 19.7 | 46.3 | 3,060 | 310 | 356 |
| W18x143 | 143 | 19.5 | 42 | 2,750 | 282 | 322 |
| W18x130 | 130 | 19.3 | 38.3 | 2,460 | 256 | 290 |
| W18x119 | 119 | 19 | 35.1 | 2,190 | 231 | 262 |
| W18x106 | 106 | 18.7 | 31.1 | 1,910 | 204 | 230 |
| W18x97 | 97 | 18.6 | 28.5 | 1,750 | 188 | 211 |
| W18x86 | 86 | 18.4 | 25.3 | 1,530 | 166 | 186 |
| W18x76 | 76 | 18.2 | 22.3 | 1,330 | 146 | 163 |
| W18x71 | 71 | 18.5 | 20.9 | 1,170 | 127 | 146 |
| W18x65 | 65 | 18.4 | 19.1 | 1,070 | 117 | 133 |
| W18x60 | 60 | 18.2 | 17.6 | 984 | 108 | 123 |
| W18x55 | 55 | 18.1 | 16.2 | 890 | 98.3 | 112 |
| W18x50 | 50 | 18 | 14.7 | 800 | 88.9 | 101 |
| W18x46 | 46 | 18.1 | 13.5 | 712 | 78.8 | 90.7 |
| W18x40 | 40 | 17.9 | 11.8 | 612 | 68.4 | 78.4 |
| W18x35 | 35 | 17.7 | 10.3 | 510 | 57.6 | 66.5 |
Nominal depth is not actual depth; the tabulated d above is what to detail to.
Relevant tools
- Steel Shape Properties Table
search and compare across every series
- Beam Shear, Moment and Deflection Diagram Calculator
check a span made up of one of these sizes
- All Shape Series
every published series, W-shapes through round HSS