HSS20X8X7/8 Steel Rectangular HSS — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Height (h) | 20 | 508.0 mm |
| Width (w) | 8 | 203.2 mm |
| Wall Thickness (t) | 0.875 | 22.2 mm |
| Area (A) | 41.2 in² | 265.8 cm² |
| Weight | 149.6 lb/ft | 222.6 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 1880 | 432 | in⁴ |
| Elastic Section Modulus (S) | 188 | 108 | in³ |
| Plastic Section Modulus (Z) | 246 | 127 | in³ |
| Radius of Gyration (r) | 6.74 | 3.24 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 1200 | 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 HSS20X8X7/8 section? 149.6 lb/ft (222.6 kg/m).
What is the section modulus of HSS20X8X7/8? Sx = 188 in³, Zx = 246 in³ (strong axis). Sy = 108 in³, Zy = 127 in³ (weak axis).
What steel grade is standard for HSS20X8X7/8? ASTM A500 Grade C (Fy = 50 ksi) or Grade B (Fy = 46 ksi). Verify with mill certificate.
What is the moment of inertia of HSS20X8X7/8? Ix = 1880 in⁴ about the strong axis and Iy = 432 in⁴ about the weak axis. The radius of gyration is rx = 6.74 in and ry = 3.24 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.