M8X6.5 Steel Miscellaneous beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8 | 203.2 mm |
| Flange Width (bf) | 2.28 | 5.79 cm |
| Flange Thickness (tf) | 0.189 | 4.8 mm |
| Web Thickness (tw) | 0.135 | 3.4 mm |
| Area (A) | 1.92 in² | 12.4 cm² |
| Weight | 6.5 lb/ft | 9.7 kg/m |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 18.5 | 0.376 | in⁴ |
| Elastic Section Modulus (S) | 4.63 | 0.329 | in³ |
| Plastic Section Modulus (Z) | 5.43 | 0.529 | in³ |
| Radius of Gyration (r) | 3.11 | 0.443 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.018 | in⁴ |
| Warping Constant (Cw) | 5.73 | in⁶ |
| Distance Between Flange Centroids (ho) | 7.81 | in |
| Effective Radius (rts) | 0.563 | in |
Design Resources
- Beam Capacity Calculator — Check M8X6.5 for your span and loads
- Column Capacity Calculator — Check M8X6.5 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 M8X6.5 beam? 6.5 lb/ft (9.7 kg/m).
What is the section modulus of M8X6.5? Sx = 4.63 in³, Zx = 5.43 in³ (strong axis). Sy = 0.329 in³, Zy = 0.529 in³ (weak axis).
What steel grade is standard for M8X6.5? ASTM A36 (Fy = 36 ksi) for M-shapes. Verify with mill certificate.
What is the moment of inertia of M8X6.5? Ix = 18.5 in⁴ about the strong axis and Iy = 0.376 in⁴ about the weak axis. The radius of gyration is rx = 3.11 in and ry = 0.443 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.