W40×327 vs W40×331
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W40×331 is the heavier section at 331 lb per foot, versus 327 for W40×327 (4 lb/ft more).
Both are nominally 40 in. deep.
W40×331 has the greater bending strength: section modulus Sx of 1210 in³ versus 1200, about 1% more.
| Property | W40×327 | W40×331 |
|---|---|---|
| Weight | 327 lb/ft | 331 lb/ft |
| Depth (d) | 40 3/4" | 40 3/4" |
| Flange width (bf) | 12 1/8" | 12 1/8" |
| Web thickness (tw) | 1 3/16" | 1 1/4" |
| Flange thickness (tf) | 2 1/8" | 2 1/8" |
| Area (A) | 95.9 in² | 97.7 in² |
| Moment of inertia (Ix) | 24500 in⁴ | 24700 in⁴ |
| Section modulus (Sx) | 1200 in³ | 1210 in³ |
| Plastic modulus (Zx) | 1410 in³ | 1430 in³ |
Open W40×327 in the interactive size chart →
Full detail: W40×327 · W40×331. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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