W18×71 vs W18×76
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W18×76 is the heavier section at 76 lb per foot, versus 71 for W18×71 (5 lb/ft more).
Both are nominally 18 in. deep.
W18×76 has the greater bending strength: section modulus Sx of 146 in³ versus 127, about 15% more.
| Property | W18×71 | W18×76 |
|---|---|---|
| Weight | 71 lb/ft | 76 lb/ft |
| Depth (d) | 18 1/2" | 18 1/4" |
| Flange width (bf) | 7 5/8" | 11" |
| Web thickness (tw) | 1/2" | 7/16" |
| Flange thickness (tf) | 13/16" | 11/16" |
| Area (A) | 20.9 in² | 22.3 in² |
| Moment of inertia (Ix) | 1170 in⁴ | 1330 in⁴ |
| Section modulus (Sx) | 127 in³ | 146 in³ |
| Plastic modulus (Zx) | 146 in³ | 163 in³ |
Open W18×71 in the interactive size chart →
Full detail: W18×71 · W18×76. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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