W14×30 vs W14×34
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W14×34 is the heavier section at 34 lb per foot, versus 30 for W14×30 (4 lb/ft more).
Both are nominally 14 in. deep.
W14×34 has the greater bending strength: section modulus Sx of 48.6 in³ versus 42, about 16% more.
| Property | W14×30 | W14×34 |
|---|---|---|
| Weight | 30 lb/ft | 34 lb/ft |
| Depth (d) | 13 7/8" | 14" |
| Flange width (bf) | 6 3/4" | 6 3/4" |
| Web thickness (tw) | 1/4" | 5/16" |
| Flange thickness (tf) | 3/8" | 7/16" |
| Area (A) | 8.85 in² | 10 in² |
| Moment of inertia (Ix) | 291 in⁴ | 340 in⁴ |
| Section modulus (Sx) | 42 in³ | 48.6 in³ |
| Plastic modulus (Zx) | 47.3 in³ | 54.6 in³ |
Open W14×30 in the interactive size chart →
Full detail: W14×30 · W14×34. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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