W12×170 vs W36×170
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×170 and W36×170 both weigh 170 lb per foot, so the choice comes down to depth and stiffness rather than weight.
W36×170 is the deeper section at a nominal 36 in., versus 12 in.
W36×170 has the greater bending strength: section modulus Sx of 581 in³ versus 235, about 147% more.
| Property | W12×170 | W36×170 |
|---|---|---|
| Weight | 170 lb/ft | 170 lb/ft |
| Depth (d) | 14" | 36 1/8" |
| Flange width (bf) | 12 5/8" | 12" |
| Web thickness (tw) | 15/16" | 11/16" |
| Flange thickness (tf) | 1 9/16" | 1 1/8" |
| Area (A) | 50 in² | 50 in² |
| Moment of inertia (Ix) | 1650 in⁴ | 10500 in⁴ |
| Section modulus (Sx) | 235 in³ | 581 in³ |
| Plastic modulus (Zx) | 275 in³ | 668 in³ |
Open W12×170 in the interactive size chart →
Full detail: W12×170 · W36×170. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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