W18x40 — Dimensions and Section Properties
Dimensions and key properties
- Weight
- = 40 lb/ft
- A
- = 11.8 in²
- d
- = 17.9 in
- Ix
- = 612 in⁴
- Sx
- = 68.4 in³
- Zx
- = 78.4 in³
- rx
- = 7.21 in
- ry
- = 1.27 in
Section properties
| Property | Value | Unit |
|---|---|---|
| Weight | 40 | lb/ft |
| A | 11.8 | in² |
| d | 17.9 | in |
| bf | 6.02 | in |
| tf | 0.525 | in |
| tw | 0.315 | in |
| Ix | 612 | in⁴ |
| Sx | 68.4 | in³ |
| Zx | 78.4 | in³ |
| rx | 7.21 | in |
| Iy | 19.1 | in⁴ |
| Sy | 6.35 | in³ |
| Zy | 10 | in³ |
| ry | 1.27 | in |
Other sizes in the W18 series
Relevant tools
- Steel Shape Properties Table
search and compare W18x40 against other sections
- Beam Shear, Moment and Deflection Diagram Calculator
find the moment this section has to carry, and how far it deflects under load
- ASTM A992
the grade most W-shapes are supplied in