W18×76 vs W18×86
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W18×86 is the heavier section at 86 lb per foot, versus 76 for W18×76 (10 lb/ft more).
Both are nominally 18 in. deep.
W18×86 has the greater bending strength: section modulus Sx of 166 in³ versus 146, about 14% more.
| Property | W18×76 | W18×86 |
|---|---|---|
| Weight | 76 lb/ft | 86 lb/ft |
| Depth (d) | 18 1/4" | 18 3/8" |
| Flange width (bf) | 11" | 11 1/8" |
| Web thickness (tw) | 7/16" | 1/2" |
| Flange thickness (tf) | 11/16" | 3/4" |
| Area (A) | 22.3 in² | 25.3 in² |
| Moment of inertia (Ix) | 1330 in⁴ | 1530 in⁴ |
| Section modulus (Sx) | 146 in³ | 166 in³ |
| Plastic modulus (Zx) | 163 in³ | 186 in³ |
Open W18×76 in the interactive size chart →
Full detail: W18×76 · W18×86. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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