There are 13 W33 shapes in the AISC Shapes Database v16.0, from W33x118 at 118 lb/ft to W33x387 at 387 lb/ft. All are nominally 33 in deep, but the actual depth runs from 32.9 in to 36 in, because adding weight to a rolled shape makes it deeper as well as thicker.
W33 is a long-span and heavy-transfer depth, used in commercial frames, industrial buildings and short-span bridges where a deep rolled section avoids the cost of a fabricated plate girder.
W33 Beam Sizes Chart
Every W33 shape, lightest first. Switch the table between inches and millimeters with the buttons.
| Shape | Weight (lb/ft) | Area (in²) | Depth (in) | Flange width (in) | Web (in) | Flange (in) | Ix (in⁴) | Sx (in³) |
|---|---|---|---|---|---|---|---|---|
| W33x118 | 118 | 34.7 | 32.9 | 11.5 | 0.55 | 0.74 | 5,900 | 359 |
| W33x130 | 130 | 38.3 | 33.1 | 11.5 | 0.58 | 0.855 | 6,710 | 406 |
| W33x141 | 141 | 41.5 | 33.3 | 11.5 | 0.605 | 0.96 | 7,450 | 448 |
| W33x152 | 152 | 44.9 | 33.5 | 11.6 | 0.635 | 1.06 | 8,160 | 487 |
| W33x169 | 169 | 49.5 | 33.8 | 11.5 | 0.67 | 1.22 | 9,290 | 549 |
| W33x201 | 201 | 59.1 | 33.7 | 15.7 | 0.715 | 1.15 | 11,600 | 686 |
| W33x221 | 221 | 65.3 | 33.9 | 15.8 | 0.775 | 1.28 | 12,900 | 759 |
| W33x241 | 241 | 71.1 | 34.2 | 15.9 | 0.83 | 1.4 | 14,200 | 831 |
| W33x263 | 263 | 77.4 | 34.5 | 15.8 | 0.87 | 1.57 | 15,900 | 919 |
| W33x291 | 291 | 85.6 | 34.8 | 15.9 | 0.96 | 1.73 | 17,700 | 1,020 |
| W33x318 | 318 | 93.7 | 35.2 | 16 | 1.04 | 1.89 | 19,500 | 1,110 |
| W33x354 | 354 | 104 | 35.6 | 16.1 | 1.16 | 2.09 | 22,000 | 1,240 |
| W33x387 | 387 | 114 | 36 | 16.2 | 1.26 | 2.28 | 24,300 | 1,350 |
What W33 Is Used For
At this depth, availability starts to matter as much as the calculation. Not every mill rolls every W33 section, and lead time on an uncommon one can drive the design more than a small weight saving does.
The nominal depth is a family name, not a measurement. Every shape above is called W33 and none of them is exactly 33 in deep. Take the real depth from the chart whenever clearance matters. See how to read steel beam sizes for the full convention.
Related Charts
Every W shape in one place: wide flange beam sizes chart. For the metric designations, see wide flange beam sizes in metric. For the naming confusion around H-beams and I-beams, see H-beam vs I-beam.
Source: AISC Shapes Database v16.0, consistent with the AISC Steel Construction Manual, 16th Edition. Last updated: October 2026.
This page is reference information only and is not engineering advice. Sizing a beam needs a licensed engineer. Full disclaimer.