C12X20.7 Steel C-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 12 | 304.8 mm |
| Flange Width (bf) | 2.94 | 7.47 cm |
| Flange Thickness (tf) | 0.501 | 12.7 mm |
| Web Thickness (tw) | 0.282 | 7.2 mm |
| Area (A) | 6.08 in² | 39.2 cm² |
| Weight | 20.7 lb/ft | 30.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 129 | 3.86 | in⁴ |
| Elastic Section Modulus (S) | 21.5 | 1.72 | in³ |
| Plastic Section Modulus (Z) | 25.6 | 3.47 | in³ |
| Radius of Gyration (r) | 4.61 | 0.797 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.369 | in⁴ |
| Warping Constant (Cw) | 112 | in⁶ |
| Distance Between Flange Centroids (ho) | 11.5 | in |
| Effective Radius (rts) | 0.983 | in |
Design Resources
- Beam Capacity Calculator — Check C12X20.7 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 C12X20.7 channel? 20.7 lb/ft (30.8 kg/m).
What is the section modulus of C12X20.7? Sx = 21.5 in³, Zx = 25.6 in³ (strong axis). Sy = 1.72 in³, Zy = 3.47 in³ (weak axis).
What steel grade is standard for C12X20.7? ASTM A36 (Fy = 36 ksi) for channels. Verify with mill certificate.
What is the moment of inertia of C12X20.7? Ix = 129 in⁴ about the strong axis and Iy = 3.86 in⁴ about the weak axis. The radius of gyration is rx = 4.61 in and ry = 0.797 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.