HSS18X8X1/4 Steel Rectangular HSS — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Height (h) | 18 | 457.2 mm |
| Width (w) | 8 | 203.2 mm |
| Wall Thickness (t) | 0.25 | 6.3 mm |
| Area (A) | 11.8 in² | 76.1 cm² |
| Weight | 42.84 lb/ft | 63.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 492 | 141 | in⁴ |
| Elastic Section Modulus (S) | 54.7 | 35.2 | in³ |
| Plastic Section Modulus (Z) | 67.7 | 38.6 | in³ |
| Radius of Gyration (r) | 6.47 | 3.46 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 351 | 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 HSS18X8X1/4 section? 42.84 lb/ft (63.8 kg/m).
What is the section modulus of HSS18X8X1/4? Sx = 54.7 in³, Zx = 67.7 in³ (strong axis). Sy = 35.2 in³, Zy = 38.6 in³ (weak axis).
What steel grade is standard for HSS18X8X1/4? ASTM A500 Grade C (Fy = 50 ksi) or Grade B (Fy = 46 ksi). Verify with mill certificate.
What is the moment of inertia of HSS18X8X1/4? Ix = 492 in⁴ about the strong axis and Iy = 141 in⁴ about the weak axis. The radius of gyration is rx = 6.47 in and ry = 3.46 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.