W18×175 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.
W18×175 measures 20 in. deep with a 11 3/8 in. flange, on a 7/8 in. web and 1 9/16 in. flanges.
At 175 lb per foot it is one of the 23 W18 sizes, which run from 35 to 311 lb/ft.
For strong-axis bending its section modulus is Sx = 344 in³ and its moment of inertia Ix = 3450 in⁴, with a plastic modulus Zx = 398 in³.
Detailing dimensions
| Depth (d) | 20" |
|---|---|
| Flange width (bf) | 11 3/8" |
| Web thickness (tw) | 7/8" |
| Flange thickness (tf) | 1 9/16" |
| k (detailing) | 2 7/16" |
| Workable gage (g) | 5 1/2" |
Section properties
| Weight | 175 lb/ft |
|---|---|
| Area (A) | 51.4 in² |
| Ix | 3450 in⁴ |
| Sx | 344 in³ |
| Zx | 398 in³ |
| rx | 8.2 in |
| Iy | 391 in⁴ |
| Sy | 68.8 in³ |
| Zy | 106 in³ |
| ry | 2.76 in |
| J | 33.8 in⁴ |
Other W18 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
All W18 sizes and dimensions →
Similar weight wide-flange beams
Comparable 175 lb/ft sections in other wide-flange beam sizes.
Compare W18×175 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 W18×175 cut, formed, or fabricated? Huntington Steel & Supply Co.
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