W40×297 vs W40×324
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W40×324 is the heavier section at 324 lb per foot, versus 297 for W40×297 (27 lb/ft more).
Both are nominally 40 in. deep.
W40×324 has the greater bending strength: section modulus Sx of 1280 in³ versus 1170, about 9% more.
| Property | W40×297 | W40×324 |
|---|---|---|
| Weight | 297 lb/ft | 324 lb/ft |
| Depth (d) | 39 7/8" | 40 1/8" |
| Flange width (bf) | 15 7/8" | 15 7/8" |
| Web thickness (tw) | 15/16" | 1" |
| Flange thickness (tf) | 1 5/8" | 1 13/16" |
| Area (A) | 87.3 in² | 95.3 in² |
| Moment of inertia (Ix) | 23200 in⁴ | 25600 in⁴ |
| Section modulus (Sx) | 1170 in³ | 1280 in³ |
| Plastic modulus (Zx) | 1330 in³ | 1460 in³ |
Open W40×297 in the interactive size chart →
Full detail: W40×297 · W40×324. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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