W14X398 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 18.30 | in (464.8 mm) |
| Flange Width (bf) | 16.60 | in (421.6 mm) |
| Flange Thickness (tf) | 2.85 | in |
| Web Thickness (tw) | 1.77 | in |
| Area (A) | 117 | in² (754.9 cm²) |
| Weight | 398 | lb/ft (592 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 6,000 | 2,170 | in⁴ |
| Elastic Section Modulus (S) | 656 | 262 | in³ |
| Plastic Section Modulus (Z) | 801 | 402 | in³ |
| Radius of Gyration (r) | 7.16 | 4.31 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 273 | in⁴ |
| Warping Constant (Cw) | 129,000 | in⁶ |
| Distance Between Flange Centroids (ho) | 15.50 | in |
| Effective Radius (rts) | 5.05 | in |
Design Resources
- Beam Capacity Calculator — Check W14X398 for your span and loads
- Column Capacity Calculator — Check W14X398 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 W14X398 beam? 398 lb/ft (592 kg/m). A 40-ft length weighs approximately 15,920 lbs.
What is the section modulus of W14X398? Sx = 656 in³ (strong axis) and Sy = 262 in³ (weak axis). The plastic section modulus Zx = 801 in³ and Zy = 402 in³.
What steel grade is standard for W14X398? 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 W14X398? Ix = 6000 in⁴ about the strong axis and Iy = 2170 in⁴ about the weak axis. The radius of gyration is rx = 7.16 in and ry = 4.31 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.