W8×24 vs W8×28
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W8×28 is the heavier section at 28 lb per foot, versus 24 for W8×24 (4 lb/ft more).
Both are nominally 8 in. deep.
W8×28 has the greater bending strength: section modulus Sx of 24.3 in³ versus 20.9, about 16% more.
| Property | W8×24 | W8×28 |
|---|---|---|
| Weight | 24 lb/ft | 28 lb/ft |
| Depth (d) | 7 7/8" | 8" |
| Flange width (bf) | 6 1/2" | 6 1/2" |
| Web thickness (tw) | 1/4" | 5/16" |
| Flange thickness (tf) | 3/8" | 7/16" |
| Area (A) | 7.08 in² | 8.25 in² |
| Moment of inertia (Ix) | 82.7 in⁴ | 98 in⁴ |
| Section modulus (Sx) | 20.9 in³ | 24.3 in³ |
| Plastic modulus (Zx) | 23.1 in³ | 27.2 in³ |
Open W8×24 in the interactive size chart →
Full detail: W8×24 · W8×28. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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