W8×58 vs W12×58
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W8×58 and W12×58 both weigh 58 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W12×58 is the deeper section at a nominal 12 in., versus 8 in.
W12×58 has the greater bending strength: section modulus Sx of 78 in³ versus 52, about 50% more.
| Property | W8×58 | W12×58 |
|---|---|---|
| Weight | 58 lb/ft | 58 lb/ft |
| Depth (d) | 8 3/4" | 12 1/4" |
| Flange width (bf) | 8 1/4" | 10" |
| Web thickness (tw) | 1/2" | 3/8" |
| Flange thickness (tf) | 13/16" | 5/8" |
| Area (A) | 17.1 in² | 17 in² |
| Moment of inertia (Ix) | 228 in⁴ | 475 in⁴ |
| Section modulus (Sx) | 52 in³ | 78 in³ |
| Plastic modulus (Zx) | 59.8 in³ | 86.4 in³ |
Open W8×58 in the interactive size chart →
Full detail: W8×58 · W12×58. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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