W27×129 vs W27×146
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W27×146 is the heavier section at 146 lb per foot, versus 129 for W27×129 (17 lb/ft more).
Both are nominally 27 in. deep.
W27×146 has the greater bending strength: section modulus Sx of 414 in³ versus 345, about 20% more.
| Property | W27×129 | W27×146 |
|---|---|---|
| Weight | 129 lb/ft | 146 lb/ft |
| Depth (d) | 27 5/8" | 27 3/8" |
| Flange width (bf) | 10" | 14" |
| Web thickness (tw) | 5/8" | 5/8" |
| Flange thickness (tf) | 1 1/8" | 1" |
| Area (A) | 37.8 in² | 43.2 in² |
| Moment of inertia (Ix) | 4760 in⁴ | 5660 in⁴ |
| Section modulus (Sx) | 345 in³ | 414 in³ |
| Plastic modulus (Zx) | 395 in³ | 464 in³ |
Open W27×129 in the interactive size chart →
Full detail: W27×129 · W27×146. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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