MC13X31.8 Steel MC-shape — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 13 | 330.2 mm |
| Flange Width (bf) | 4 | 10.16 cm |
| Flange Thickness (tf) | 0.61 | 15.5 mm |
| Web Thickness (tw) | 0.375 | 9.5 mm |
| Area (A) | 9.35 in² | 60.3 cm² |
| Weight | 31.8 lb/ft | 47.3 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 239 | 11.4 | in⁴ |
| Elastic Section Modulus (S) | 36.7 | 3.79 | in³ |
| Plastic Section Modulus (Z) | 43.4 | 7.69 | in³ |
| Radius of Gyration (r) | 5.05 | 1.1 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.937 | in⁴ |
| Warping Constant (Cw) | 380 | in⁶ |
| Distance Between Flange Centroids (ho) | 12.4 | in |
| Effective Radius (rts) | 1.34 | in |
Design Resources
- Beam Capacity Calculator — Check MC13X31.8 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 MC13X31.8 channel? 31.8 lb/ft (47.3 kg/m).
What is the section modulus of MC13X31.8? Sx = 36.7 in³, Zx = 43.4 in³ (strong axis). Sy = 3.79 in³, Zy = 7.69 in³ (weak axis).
What steel grade is standard for MC13X31.8? ASTM A36 (Fy = 36 ksi) for MC-shapes. Verify with mill certificate.
What is the moment of inertia of MC13X31.8? Ix = 239 in⁴ about the strong axis and Iy = 11.4 in⁴ about the weak axis. The radius of gyration is rx = 5.05 in and ry = 1.1 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.