HP18×181 H-pile
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.
HP18×181 measures 18 in. deep with a 18 in. flange, on a 1 in. web and 1 in. flanges.
At 181 lb per foot it is one of the 4 HP18 sizes, which run from 135 to 204 lb/ft.
For strong-axis bending its section modulus is Sx = 336 in³ and its moment of inertia Ix = 3020 in⁴, with a plastic modulus Zx = 379 in³.
Detailing dimensions
| Depth (d) | 18" |
|---|---|
| Flange width (bf) | 18" |
| Web thickness (tw) | 1" |
| Flange thickness (tf) | 1" |
| k (detailing) | 2 3/16" |
| Workable gage (g) | 7 1/2" |
Section properties
| Weight | 181 lb/ft |
|---|---|
| Area (A) | 53.2 in² |
| Ix | 3020 in⁴ |
| Sx | 336 in³ |
| Zx | 379 in³ |
| rx | 7.53 in |
| Iy | 974 in⁴ |
| Sy | 108 in³ |
| Zy | 167 in³ |
| ry | 4.28 in |
| J | 20.7 in⁴ |
Other HP18 sizes
Same nominal size, different weight — useful when you are checking a substitution or a lighter section.
Similar weight H-piles
Comparable 181 lb/ft sections in other H-pile sizes.
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 HP18×181 cut, formed, or fabricated? Huntington Steel & Supply Co.
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