C8X18.75 Steel C-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8 | 203.2 mm |
| Flange Width (bf) | 2.53 | 6.43 cm |
| Flange Thickness (tf) | 0.39 | 9.9 mm |
| Web Thickness (tw) | 0.487 | 12.4 mm |
| Area (A) | 5.51 in² | 35.5 cm² |
| Weight | 18.75 lb/ft | 27.9 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 43.9 | 1.97 | in⁴ |
| Elastic Section Modulus (S) | 11 | 1.01 | in³ |
| Plastic Section Modulus (Z) | 13.9 | 2.17 | in³ |
| Radius of Gyration (r) | 2.82 | 0.598 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.434 | in⁴ |
| Warping Constant (Cw) | 25.1 | in⁶ |
| Distance Between Flange Centroids (ho) | 7.61 | in |
| Effective Radius (rts) | 0.8 | in |
Design Resources
- Beam Capacity Calculator — Check C8X18.75 for your span and loads
- 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 C8X18.75 channel? 18.75 lb/ft (27.9 kg/m).
What is the section modulus of C8X18.75? Sx = 11 in³, Zx = 13.9 in³ (strong axis). Sy = 1.01 in³, Zy = 2.17 in³ (weak axis).
What steel grade is standard for C8X18.75? ASTM A36 (Fy = 36 ksi) for channels. Verify with mill certificate.
What is the moment of inertia of C8X18.75? Ix = 43.9 in⁴ about the strong axis and Iy = 1.97 in⁴ about the weak axis. The radius of gyration is rx = 2.82 in and ry = 0.598 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.