W12×120 wide-flange beam
Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.
W12×120 measures 13 1/8 in. deep with a 12 3/8 in. flange, on a 11/16 in. web and 1 1/8 in. flanges.
At 120 lb per foot it is one of the 29 W12 sizes, which run from 14 to 336 lb/ft.
For strong-axis bending its section modulus is Sx = 163 in³ and its moment of inertia Ix = 1070 in⁴, with a plastic modulus Zx = 186 in³.
Detailing dimensions
| Depth (d) | 13 1/8" |
|---|---|
| Flange width (bf) | 12 3/8" |
| Web thickness (tw) | 11/16" |
| Flange thickness (tf) | 1 1/8" |
| k (detailing) | 2" |
| Workable gage (g) | 5 1/2" |
Section properties
| Weight | 120 lb/ft |
|---|---|
| Area (A) | 35.2 in² |
| Ix | 1070 in⁴ |
| Sx | 163 in³ |
| Zx | 186 in³ |
| rx | 5.51 in |
| Iy | 345 in⁴ |
| Sy | 56 in³ |
| Zy | 85.4 in³ |
| ry | 3.13 in |
| J | 12.9 in⁴ |
Other W12 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All W12 sizes and dimensions →
Similar weight wide-flange beams
Comparable 120 lb/ft sections in other wide-flange beam sizes.
Compare W12×120 with a nearby size
Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need W12×120 cut, formed, or fabricated? Huntington Steel & Supply Co.
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