W33×201 vs W33×221
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W33×221 is the heavier section at 221 lb per foot, versus 201 for W33×201 (20 lb/ft more).
Both are nominally 33 in. deep.
W33×221 has the greater bending strength: section modulus Sx of 759 in³ versus 686, about 11% more.
| Property | W33×201 | W33×221 |
|---|---|---|
| Weight | 201 lb/ft | 221 lb/ft |
| Depth (d) | 33 5/8" | 33 7/8" |
| Flange width (bf) | 15 3/4" | 15 3/4" |
| Web thickness (tw) | 11/16" | 3/4" |
| Flange thickness (tf) | 1 1/8" | 1 1/4" |
| Area (A) | 59.1 in² | 65.3 in² |
| Moment of inertia (Ix) | 11600 in⁴ | 12900 in⁴ |
| Section modulus (Sx) | 686 in³ | 759 in³ |
| Plastic modulus (Zx) | 773 in³ | 857 in³ |
Open W33×201 in the interactive size chart →
Full detail: W33×201 · W33×221. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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