HP18×204 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.

HP18×204 measures 18 1/4 in. deep with a 18 1/8 in. flange, on a 1 1/8 in. web and 1 1/8 in. flanges.

At 204 lb per foot it is the heaviest of the 4 HP18 sizes, which run from 135 to 204 lb/ft.

For strong-axis bending its section modulus is Sx = 380 in³ and its moment of inertia Ix = 3480 in⁴, with a plastic modulus Zx = 433 in³.

Detailing dimensions

Depth (d)18 1/4"
Flange width (bf)18 1/8"
Web thickness (tw)1 1/8"
Flange thickness (tf)1 1/8"
k (detailing)2 5/16"
Workable gage (g)7 1/2"

Section properties

Weight204 lb/ft
Area (A)60.2 in²
Ix3480 in⁴
Sx380 in³
Zx433 in³
rx7.6 in
Iy1120 in⁴
Sy124 in³
Zy191 in³
ry4.31 in
J29.5 in⁴

Other HP18 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

HP18×135HP18×157HP18×181

Similar weight H-piles

Comparable 204 lb/ft sections in other H-pile sizes.

HP16×183183 lb/ft · Sx 304 in³HP16×162162 lb/ft · Sx 269 in³HP16×141141 lb/ft · Sx 234 in³HP16×121121 lb/ft · Sx 201 in³HP14×117117 lb/ft · Sx 172 in³HP14×102102 lb/ft · Sx 150 in³HP16×101101 lb/ft · Sx 168 in³HP14×8989 lb/ft · Sx 131 in³

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 HP18×204 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: H-piles · Steel Beam Size Chart

Interactive drawing