S20X75 Steel S-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 20 | 508.0 mm |
| Flange Width (bf) | 6.39 | 16.23 cm |
| Flange Thickness (tf) | 0.795 | 20.2 mm |
| Web Thickness (tw) | 0.635 | 16.1 mm |
| Area (A) | 22 in² | 141.9 cm² |
| Weight | 75 lb/ft | 111.6 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 1280 | 29.5 | in⁴ |
| Elastic Section Modulus (S) | 128 | 9.25 | in³ |
| Plastic Section Modulus (Z) | 152 | 16.7 | in³ |
| Radius of Gyration (r) | 7.62 | 1.16 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 4.59 | in⁴ |
| Warping Constant (Cw) | 2720 | in⁶ |
| Distance Between Flange Centroids (ho) | 19.2 | in |
| Effective Radius (rts) | 1.49 | in |
Design Resources
- Beam Capacity Calculator — Check S20X75 for your span and loads
- Column Capacity Calculator — Check S20X75 as a column
- 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 S20X75 beam? 75 lb/ft (111.6 kg/m).
What is the section modulus of S20X75? Sx = 128 in³, Zx = 152 in³ (strong axis). Sy = 9.25 in³, Zy = 16.7 in³ (weak axis).
What steel grade is standard for S20X75? ASTM A36 (Fy = 36 ksi) for S-shapes. Verify with mill certificate.
What is the moment of inertia of S20X75? Ix = 1280 in⁴ about the strong axis and Iy = 29.5 in⁴ about the weak axis. The radius of gyration is rx = 7.62 in and ry = 1.16 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.