W16×26 vs W16×31
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W16×31 is the heavier section at 31 lb per foot, versus 26 for W16×26 (5 lb/ft more).
Both are nominally 16 in. deep.
W16×31 has the greater bending strength: section modulus Sx of 47.2 in³ versus 38.4, about 23% more.
| Property | W16×26 | W16×31 |
|---|---|---|
| Weight | 26 lb/ft | 31 lb/ft |
| Depth (d) | 15 3/4" | 15 7/8" |
| Flange width (bf) | 5 1/2" | 5 1/2" |
| Web thickness (tw) | 1/4" | 1/4" |
| Flange thickness (tf) | 3/8" | 7/16" |
| Area (A) | 7.68 in² | 9.13 in² |
| Moment of inertia (Ix) | 301 in⁴ | 375 in⁴ |
| Section modulus (Sx) | 38.4 in³ | 47.2 in³ |
| Plastic modulus (Zx) | 44.2 in³ | 54 in³ |
Open W16×26 in the interactive size chart →
Full detail: W16×26 · W16×31. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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