W8×35 vs W12×35
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W8×35 and W12×35 both weigh 35 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W12×35 is the deeper section at a nominal 12 in., versus 8 in.
W12×35 has the greater bending strength: section modulus Sx of 45.6 in³ versus 31.2, about 46% more.
| Property | W8×35 | W12×35 |
|---|---|---|
| Weight | 35 lb/ft | 35 lb/ft |
| Depth (d) | 8 1/8" | 12 1/2" |
| Flange width (bf) | 8" | 6 1/2" |
| Web thickness (tw) | 5/16" | 5/16" |
| Flange thickness (tf) | 1/2" | 1/2" |
| Area (A) | 10.3 in² | 10.3 in² |
| Moment of inertia (Ix) | 127 in⁴ | 285 in⁴ |
| Section modulus (Sx) | 31.2 in³ | 45.6 in³ |
| Plastic modulus (Zx) | 34.7 in³ | 51.2 in³ |
Open W8×35 in the interactive size chart →
Full detail: W8×35 · W12×35. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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