W14×398 vs W14×426
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×426 is the heavier section at 426 lb per foot, versus 398 for W14×398 (28 lb/ft more).
Both are nominally 14 in. deep.
W14×426 has the greater bending strength: section modulus Sx of 706 in³ versus 656, about 8% more.
| Property | W14×398 | W14×426 |
|---|---|---|
| Weight | 398 lb/ft | 426 lb/ft |
| Depth (d) | 18 1/4" | 18 5/8" |
| Flange width (bf) | 16 5/8" | 16 3/4" |
| Web thickness (tw) | 1 3/4" | 1 7/8" |
| Flange thickness (tf) | 2 7/8" | 3 1/16" |
| Area (A) | 117 in² | 125 in² |
| Moment of inertia (Ix) | 6000 in⁴ | 6600 in⁴ |
| Section modulus (Sx) | 656 in³ | 706 in³ |
| Plastic modulus (Zx) | 801 in³ | 869 in³ |
Open W14×398 in the interactive size chart →
Full detail: W14×398 · W14×426. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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