W33×354 vs W33×387
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W33×387 is the heavier section at 387 lb per foot, versus 354 for W33×354 (33 lb/ft more).
Both are nominally 33 in. deep.
W33×387 has the greater bending strength: section modulus Sx of 1350 in³ versus 1240, about 9% more.
| Property | W33×354 | W33×387 |
|---|---|---|
| Weight | 354 lb/ft | 387 lb/ft |
| Depth (d) | 35 1/2" | 36" |
| Flange width (bf) | 16 1/8" | 16 1/4" |
| Web thickness (tw) | 1 3/16" | 1 1/4" |
| Flange thickness (tf) | 2 1/16" | 2 1/4" |
| Area (A) | 104 in² | 114 in² |
| Moment of inertia (Ix) | 22000 in⁴ | 24300 in⁴ |
| Section modulus (Sx) | 1240 in³ | 1350 in³ |
| Plastic modulus (Zx) | 1420 in³ | 1560 in³ |
Open W33×354 in the interactive size chart →
Full detail: W33×354 · W33×387. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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