W27X129 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 27.60 | in (701.0 mm) |
| Flange Width (bf) | 10 | in (254.0 mm) |
| Flange Thickness (tf) | 1.10 | in |
| Web Thickness (tw) | 0.61 | in |
| Area (A) | 37.80 | in² (243.9 cm²) |
| Weight | 129 | lb/ft (192 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 4,760 | 184 | in⁴ |
| Elastic Section Modulus (S) | 345 | 36.80 | in³ |
| Plastic Section Modulus (Z) | 395 | 57.60 | in³ |
| Radius of Gyration (r) | 11.20 | 2.21 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 11.10 | in⁴ |
| Warping Constant (Cw) | 32,500 | in⁶ |
| Distance Between Flange Centroids (ho) | 26.50 | in |
| Effective Radius (rts) | 2.66 | in |
Design Resources
- Beam Capacity Calculator — Check W27X129 for your span and loads
- Column Capacity Calculator — Check W27X129 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 W27X129 beam? 129 lb/ft (192 kg/m). A 40-ft length weighs approximately 5,160 lbs.
What is the section modulus of W27X129? Sx = 345 in³ (strong axis) and Sy = 36.8 in³ (weak axis). The plastic section modulus Zx = 395 in³ and Zy = 57.6 in³.
What steel grade is standard for W27X129? 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 W27X129? Ix = 4760 in⁴ about the strong axis and Iy = 184 in⁴ about the weak axis. The radius of gyration is rx = 11.20 in and ry = 2.21 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.