HSS20X12X7/8 Steel Rectangular HSS — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Height (h) | 20 | 508.0 mm |
| Width (w) | 12 | 304.8 mm |
| Wall Thickness (t) | 0.875 | 22.2 mm |
| Area (A) | 47.7 in² | 307.7 cm² |
| Weight | 173.4 lb/ft | 258.0 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 2480 | 1110 | in⁴ |
| Elastic Section Modulus (S) | 248 | 186 | in³ |
| Plastic Section Modulus (Z) | 308 | 216 | in³ |
| Radius of Gyration (r) | 7.2 | 4.83 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 2530 | 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 HSS20X12X7/8 section? 173.4 lb/ft (258.0 kg/m).
What is the section modulus of HSS20X12X7/8? Sx = 248 in³, Zx = 308 in³ (strong axis). Sy = 186 in³, Zy = 216 in³ (weak axis).
What steel grade is standard for HSS20X12X7/8? ASTM A500 Grade C (Fy = 50 ksi) or Grade B (Fy = 46 ksi). Verify with mill certificate.
What is the moment of inertia of HSS20X12X7/8? Ix = 2480 in⁴ about the strong axis and Iy = 1110 in⁴ about the weak axis. The radius of gyration is rx = 7.2 in and ry = 4.83 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.