W8×15 vs W10×15
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W8×15 and W10×15 both weigh 15 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W10×15 is the deeper section at a nominal 10 in., versus 8 in.
W10×15 has the greater bending strength: section modulus Sx of 13.8 in³ versus 11.8, about 17% more.
| Property | W8×15 | W10×15 |
|---|---|---|
| Weight | 15 lb/ft | 15 lb/ft |
| Depth (d) | 8 1/8" | 10" |
| Flange width (bf) | 4" | 4" |
| Web thickness (tw) | 1/4" | 1/4" |
| Flange thickness (tf) | 5/16" | 1/4" |
| Area (A) | 4.44 in² | 4.41 in² |
| Moment of inertia (Ix) | 48 in⁴ | 68.9 in⁴ |
| Section modulus (Sx) | 11.8 in³ | 13.8 in³ |
| Plastic modulus (Zx) | 13.6 in³ | 16 in³ |
Open W8×15 in the interactive size chart →
Full detail: W8×15 · W10×15. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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