W8X15 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8.11 | in (206.0 mm) |
| Flange Width (bf) | 4.02 | in (102.1 mm) |
| Flange Thickness (tf) | 0.32 | in |
| Web Thickness (tw) | 0.24 | in |
| Area (A) | 4.44 | in² (28.6 cm²) |
| Weight | 15 | lb/ft (22 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 48 | 3.41 | in⁴ |
| Elastic Section Modulus (S) | 11.80 | 1.70 | in³ |
| Plastic Section Modulus (Z) | 13.60 | 2.67 | in³ |
| Radius of Gyration (r) | 3.29 | 0.88 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.14 | in⁴ |
| Warping Constant (Cw) | 51.80 | in⁶ |
| Distance Between Flange Centroids (ho) | 7.80 | in |
| Effective Radius (rts) | 1.06 | in |
Design Resources
- Beam Capacity Calculator — Check W8X15 for your span and loads
- Column Capacity Calculator — Check W8X15 as a column
- Section Properties Database — Compare with other sections
- Steel Beam Sizes Reference — Full W-shape dimension table
- Steel Grades Reference — A992/A572 material properties
Frequently Asked Questions
What is the weight of a W8X15 beam? 15 lb/ft (22 kg/m). A 40-ft length weighs approximately 600 lbs.
What is the section modulus of W8X15? Sx = 11.8 in³ (strong axis) and Sy = 1.7 in³ (weak axis). The plastic section modulus Zx = 13.6 in³ and Zy = 2.7 in³.
What steel grade is standard for W8X15? Typically ASTM A992 (Fy = 50 ksi, Fu = 65 ksi) for W-shapes. Also available in A572 Grade 50 or A36. Verify with mill certificate.
What is the moment of inertia of W8X15? Ix = 48 in⁴ about the strong axis and Iy = 3.4 in⁴ about the weak axis. The radius of gyration is rx = 3.29 in and ry = 0.88 in.
Related Pages
- Steel Beam Sizes Reference
- Beam Capacity Calculator
- Column Capacity Calculator
- Section Properties Database
Educational reference only. Verify all section properties against the current AISC Manual and mill certificates before design. Results are PRELIMINARY — NOT FOR CONSTRUCTION.