W18X234 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 21.10 | in (535.9 mm) |
| Flange Width (bf) | 11.70 | in (297.2 mm) |
| Flange Thickness (tf) | 2.11 | in |
| Web Thickness (tw) | 1.16 | in |
| Area (A) | 68.60 | in² (442.6 cm²) |
| Weight | 234 | lb/ft (348 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 4,900 | 558 | in⁴ |
| Elastic Section Modulus (S) | 466 | 95.80 | in³ |
| Plastic Section Modulus (Z) | 549 | 149 | in³ |
| Radius of Gyration (r) | 8.44 | 2.85 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 78.70 | in⁴ |
| Warping Constant (Cw) | 50,100 | in⁶ |
| Distance Between Flange Centroids (ho) | 19 | in |
| Effective Radius (rts) | 3.37 | in |
Design Resources
- Beam Capacity Calculator — Check W18X234 for your span and loads
- Column Capacity Calculator — Check W18X234 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 W18X234 beam? 234 lb/ft (348 kg/m). A 40-ft length weighs approximately 9,360 lbs.
What is the section modulus of W18X234? Sx = 466 in³ (strong axis) and Sy = 95.8 in³ (weak axis). The plastic section modulus Zx = 549 in³ and Zy = 149 in³.
What steel grade is standard for W18X234? 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 W18X234? Ix = 4900 in⁴ about the strong axis and Iy = 558 in⁴ about the weak axis. The radius of gyration is rx = 8.44 in and ry = 2.85 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.