MC8X20 Steel MC-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8 | 203.2 mm |
| Flange Width (bf) | 3.03 | 7.70 cm |
| Flange Thickness (tf) | 0.5 | 12.7 mm |
| Web Thickness (tw) | 0.4 | 10.2 mm |
| Area (A) | 5.87 in² | 37.9 cm² |
| Weight | 20 lb/ft | 29.8 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 54.4 | 4.42 | in⁴ |
| Elastic Section Modulus (S) | 13.6 | 2.02 | in³ |
| Plastic Section Modulus (Z) | 16.4 | 3.86 | in³ |
| Radius of Gyration (r) | 3.04 | 0.867 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.441 | in⁴ |
| Warping Constant (Cw) | 47.8 | in⁶ |
| Distance Between Flange Centroids (ho) | 7.5 | in |
| Effective Radius (rts) | 1.03 | in |
Design Resources
- Beam Capacity Calculator — Check MC8X20 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 MC8X20 channel? 20 lb/ft (29.8 kg/m).
What is the section modulus of MC8X20? Sx = 13.6 in³, Zx = 16.4 in³ (strong axis). Sy = 2.02 in³, Zy = 3.86 in³ (weak axis).
What steel grade is standard for MC8X20? ASTM A36 (Fy = 36 ksi) for MC-shapes. Verify with mill certificate.
What is the moment of inertia of MC8X20? Ix = 54.4 in⁴ about the strong axis and Iy = 4.42 in⁴ about the weak axis. The radius of gyration is rx = 3.04 in and ry = 0.867 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.