W14×34 vs W14×38
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×38 is the heavier section at 38 lb per foot, versus 34 for W14×34 (4 lb/ft more).
Both are nominally 14 in. deep.
W14×38 has the greater bending strength: section modulus Sx of 54.6 in³ versus 48.6, about 12% more.
| Property | W14×34 | W14×38 |
|---|---|---|
| Weight | 34 lb/ft | 38 lb/ft |
| Depth (d) | 14" | 14 1/8" |
| Flange width (bf) | 6 3/4" | 6 3/4" |
| Web thickness (tw) | 5/16" | 5/16" |
| Flange thickness (tf) | 7/16" | 1/2" |
| Area (A) | 10 in² | 11.2 in² |
| Moment of inertia (Ix) | 340 in⁴ | 385 in⁴ |
| Section modulus (Sx) | 48.6 in³ | 54.6 in³ |
| Plastic modulus (Zx) | 54.6 in³ | 61.5 in³ |
Open W14×34 in the interactive size chart →
Full detail: W14×34 · W14×38. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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