W24×84 vs W27×84
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W24×84 and W27×84 both weigh 84 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W27×84 is the deeper section at a nominal 27 in., versus 24 in.
W27×84 has the greater bending strength: section modulus Sx of 213 in³ versus 196, about 9% more.
| Property | W24×84 | W27×84 |
|---|---|---|
| Weight | 84 lb/ft | 84 lb/ft |
| Depth (d) | 24 1/8" | 26 3/4" |
| Flange width (bf) | 9" | 10" |
| Web thickness (tw) | 1/2" | 7/16" |
| Flange thickness (tf) | 3/4" | 5/8" |
| Area (A) | 24.7 in² | 24.7 in² |
| Moment of inertia (Ix) | 2370 in⁴ | 2850 in⁴ |
| Section modulus (Sx) | 196 in³ | 213 in³ |
| Plastic modulus (Zx) | 224 in³ | 244 in³ |
Open W24×84 in the interactive size chart →
Full detail: W24×84 · W27×84. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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