HSS18X8X1/2 Steel Rectangular HSS — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Height (h) | 18 | 457.2 mm |
| Width (w) | 8 | 203.2 mm |
| Wall Thickness (t) | 0.5 | 12.7 mm |
| Area (A) | 22.8 in² | 147.1 cm² |
| Weight | 82.88 lb/ft | 123.3 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 913 | 257 | in⁴ |
| Elastic Section Modulus (S) | 101 | 64.2 | in³ |
| Plastic Section Modulus (Z) | 128 | 72.5 | in³ |
| Radius of Gyration (r) | 6.33 | 3.36 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 659 | in⁴ |
| Warping Constant (Cw) | 0 | in⁶ |
Design Resources
- Section Properties Database — Compare with other sections
- Steel Grades Reference — Material properties
Frequently Asked Questions
What is the weight of a HSS18X8X1/2 section? 82.88 lb/ft (123.3 kg/m).
What is the section modulus of HSS18X8X1/2? Sx = 101 in³, Zx = 128 in³ (strong axis). Sy = 64.2 in³, Zy = 72.5 in³ (weak axis).
What steel grade is standard for HSS18X8X1/2? ASTM A500 Grade C (Fy = 50 ksi) or Grade B (Fy = 46 ksi). Verify with mill certificate.
What is the moment of inertia of HSS18X8X1/2? Ix = 913 in⁴ about the strong axis and Iy = 257 in⁴ about the weak axis. The radius of gyration is rx = 6.33 in and ry = 3.36 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.