W12×106 vs W12×120
A side-by-side comparison of two AISC wide-flange beams, 16th Edition. Detailing dimensions to the nearest 1/16 in.
W12×120 is the heavier section at 120 lb per foot, versus 106 for W12×106 (14 lb/ft more).
Both are nominally 12 in. deep.
W12×120 has the greater bending strength: section modulus Sx of 163 in³ versus 145, about 12% more.
| Property | W12×106 | W12×120 |
|---|---|---|
| Weight | 106 lb/ft | 120 lb/ft |
| Depth (d) | 12 7/8" | 13 1/8" |
| Flange width (bf) | 12 1/4" | 12 3/8" |
| Web thickness (tw) | 5/8" | 11/16" |
| Flange thickness (tf) | 1" | 1 1/8" |
| Area (A) | 31.2 in² | 35.2 in² |
| Moment of inertia (Ix) | 933 in⁴ | 1070 in⁴ |
| Section modulus (Sx) | 145 in³ | 163 in³ |
| Plastic modulus (Zx) | 164 in³ | 186 in³ |
Open W12×106 in the interactive size chart →
Full detail: W12×106 · W12×120. Verify critical dimensions against the current AISC Steel Construction Manual before fabrication.
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