W24×76 vs W24×84
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W24×84 is the heavier section at 84 lb per foot, versus 76 for W24×76 (8 lb/ft more).
Both are nominally 24 in. deep.
W24×84 has the greater bending strength: section modulus Sx of 196 in³ versus 176, about 11% more.
| Property | W24×76 | W24×84 |
|---|---|---|
| Weight | 76 lb/ft | 84 lb/ft |
| Depth (d) | 23 7/8" | 24 1/8" |
| Flange width (bf) | 9" | 9" |
| Web thickness (tw) | 7/16" | 1/2" |
| Flange thickness (tf) | 11/16" | 3/4" |
| Area (A) | 22.4 in² | 24.7 in² |
| Moment of inertia (Ix) | 2100 in⁴ | 2370 in⁴ |
| Section modulus (Sx) | 176 in³ | 196 in³ |
| Plastic modulus (Zx) | 200 in³ | 224 in³ |
Open W24×76 in the interactive size chart →
Full detail: W24×76 · W24×84. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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