W8X28 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 8.06 | in (204.7 mm) |
| Flange Width (bf) | 6.54 | in (166.1 mm) |
| Flange Thickness (tf) | 0.47 | in |
| Web Thickness (tw) | 0.28 | in |
| Area (A) | 8.25 | in² (53.2 cm²) |
| Weight | 28 | lb/ft (42 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 98 | 21.70 | in⁴ |
| Elastic Section Modulus (S) | 24.30 | 6.63 | in³ |
| Plastic Section Modulus (Z) | 27.20 | 10.10 | in³ |
| Radius of Gyration (r) | 3.45 | 1.62 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.54 | in⁴ |
| Warping Constant (Cw) | 312 | in⁶ |
| Distance Between Flange Centroids (ho) | 7.60 | in |
| Effective Radius (rts) | 1.84 | in |
Design Resources
- Beam Capacity Calculator — Check W8X28 for your span and loads
- Column Capacity Calculator — Check W8X28 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 W8X28 beam? 28 lb/ft (42 kg/m). A 40-ft length weighs approximately 1,120 lbs.
What is the section modulus of W8X28? Sx = 24.3 in³ (strong axis) and Sy = 6.6 in³ (weak axis). The plastic section modulus Zx = 27.2 in³ and Zy = 10.1 in³.
What steel grade is standard for W8X28? 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 W8X28? Ix = 98 in⁴ about the strong axis and Iy = 21.7 in⁴ about the weak axis. The radius of gyration is rx = 3.45 in and ry = 1.62 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.