HP18X181 Steel HP-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18 | 457.2 mm |
| Flange Width (bf) | 18 | 45.72 cm |
| Flange Thickness (tf) | 1 | 25.4 mm |
| Web Thickness (tw) | 1 | 25.4 mm |
| Area (A) | 53.2 in² | 343.2 cm² |
| Weight | 181 lb/ft | 269.4 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 3020 | 974 | in⁴ |
| Elastic Section Modulus (S) | 336 | 108 | in³ |
| Plastic Section Modulus (Z) | 379 | 167 | in³ |
| Radius of Gyration (r) | 7.53 | 4.28 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 20.7 | in⁴ |
| Warping Constant (Cw) | 70400 | in⁶ |
| Distance Between Flange Centroids (ho) | 17 | in |
| Effective Radius (rts) | 4.96 | in |
Design Resources
- Column Capacity Calculator — Check HP18X181 as a pile
- Section Properties Database — Compare with other sections
- Steel Beam Sizes Reference — Full dimension table
- Steel Grades Reference — Material properties
Frequently Asked Questions
What is the weight of a HP18X181 pile? 181 lb/ft (269.4 kg/m).
What is the section modulus of HP18X181? Sx = 336 in³, Zx = 379 in³ (strong axis). Sy = 108 in³, Zy = 167 in³ (weak axis).
What steel grade is standard for HP18X181? ASTM A572 Grade 50 (Fy = 50 ksi) or A36 for HP-shapes. Verify with mill certificate.
What is the moment of inertia of HP18X181? Ix = 3020 in⁴ about the strong axis and Iy = 974 in⁴ about the weak axis. The radius of gyration is rx = 7.53 in and ry = 4.28 in.
Related Pages
Educational reference only. Verify all section properties against the current AISC Manual and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.