W12×120 vs W12×136
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×136 is the heavier section at 136 lb per foot, versus 120 for W12×120 (16 lb/ft more).
Both are nominally 12 in. deep.
W12×136 has the greater bending strength: section modulus Sx of 186 in³ versus 163, about 14% more.
| Property | W12×120 | W12×136 |
|---|---|---|
| Weight | 120 lb/ft | 136 lb/ft |
| Depth (d) | 13 1/8" | 13 3/8" |
| Flange width (bf) | 12 3/8" | 12 3/8" |
| Web thickness (tw) | 11/16" | 13/16" |
| Flange thickness (tf) | 1 1/8" | 1 1/4" |
| Area (A) | 35.2 in² | 39.9 in² |
| Moment of inertia (Ix) | 1070 in⁴ | 1240 in⁴ |
| Section modulus (Sx) | 163 in³ | 186 in³ |
| Plastic modulus (Zx) | 186 in³ | 214 in³ |
Open W12×120 in the interactive size chart →
Full detail: W12×120 · W12×136. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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