W18X35 Steel Beam — Section Properties
Dimensions
| Property | Value | Unit |
|---|---|---|
| Depth (d) | 17.70 | in (449.6 mm) |
| Flange Width (bf) | 6 | in (152.4 mm) |
| Flange Thickness (tf) | 0.42 | in |
| Web Thickness (tw) | 0.30 | in |
| Area (A) | 10.30 | in² (66.5 cm²) |
| Weight | 35 | lb/ft (52 kg/m) |
Elastic Section Properties
| Property | Strong Axis (X-X) | Weak Axis (Y-Y) | Unit |
|---|---|---|---|
| Moment of Inertia (I) | 510 | 15.30 | in⁴ |
| Elastic Section Modulus (S) | 57.60 | 5.12 | in³ |
| Plastic Section Modulus (Z) | 66.50 | 8.06 | in³ |
| Radius of Gyration (r) | 7.04 | 1.22 | in |
Torsional Properties
| Property | Value | Unit |
|---|---|---|
| Torsional Constant (J) | 0.51 | in⁴ |
| Warping Constant (Cw) | 1,140 | in⁶ |
| Distance Between Flange Centroids (ho) | 17.30 | in |
| Effective Radius (rts) | 1.51 | in |
Design Resources
- Beam Capacity Calculator — Check W18X35 for your span and loads
- Column Capacity Calculator — Check W18X35 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 W18X35 beam? 35 lb/ft (52 kg/m). A 40-ft length weighs approximately 1,400 lbs.
What is the section modulus of W18X35? Sx = 57.6 in³ (strong axis) and Sy = 5.1 in³ (weak axis). The plastic section modulus Zx = 66.5 in³ and Zy = 8.1 in³.
What steel grade is standard for W18X35? 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 W18X35? Ix = 510 in⁴ about the strong axis and Iy = 15.3 in⁴ about the weak axis. The radius of gyration is rx = 7.04 in and ry = 1.22 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.