W14×342 vs W14×370
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×370 is the heavier section at 370 lb per foot, versus 342 for W14×342 (28 lb/ft more).
Both are nominally 14 in. deep.
W14×370 has the greater bending strength: section modulus Sx of 607 in³ versus 558, about 9% more.
| Property | W14×342 | W14×370 |
|---|---|---|
| Weight | 342 lb/ft | 370 lb/ft |
| Depth (d) | 17 1/2" | 17 7/8" |
| Flange width (bf) | 16 3/8" | 16 1/2" |
| Web thickness (tw) | 1 9/16" | 1 11/16" |
| Flange thickness (tf) | 2 1/2" | 2 11/16" |
| Area (A) | 101 in² | 109 in² |
| Moment of inertia (Ix) | 4900 in⁴ | 5440 in⁴ |
| Section modulus (Sx) | 558 in³ | 607 in³ |
| Plastic modulus (Zx) | 672 in³ | 736 in³ |
Open W14×342 in the interactive size chart →
Full detail: W14×342 · W14×370. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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