W18×86 vs W18×97
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W18×97 is the heavier section at 97 lb per foot, versus 86 for W18×86 (11 lb/ft more).
Both are nominally 18 in. deep.
W18×97 has the greater bending strength: section modulus Sx of 188 in³ versus 166, about 13% more.
| Property | W18×86 | W18×97 |
|---|---|---|
| Weight | 86 lb/ft | 97 lb/ft |
| Depth (d) | 18 3/8" | 18 5/8" |
| Flange width (bf) | 11 1/8" | 11 1/8" |
| Web thickness (tw) | 1/2" | 9/16" |
| Flange thickness (tf) | 3/4" | 7/8" |
| Area (A) | 25.3 in² | 28.5 in² |
| Moment of inertia (Ix) | 1530 in⁴ | 1750 in⁴ |
| Section modulus (Sx) | 166 in³ | 188 in³ |
| Plastic modulus (Zx) | 186 in³ | 211 in³ |
Open W18×86 in the interactive size chart →
Full detail: W18×86 · W18×97. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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