W8x31 — Dimensions and Section Properties
Dimensions and key properties
- Weight
- = 31 lb/ft
- A
- = 9.13 in²
- d
- = 8 in
- Ix
- = 110 in⁴
- Sx
- = 27.5 in³
- Zx
- = 30.4 in³
- rx
- = 3.47 in
- ry
- = 2.02 in
Section properties
| Property | Value | Unit |
|---|---|---|
| Weight | 31 | lb/ft |
| A | 9.13 | in² |
| d | 8 | in |
| bf | 8 | in |
| tf | 0.435 | in |
| tw | 0.285 | in |
| Ix | 110 | in⁴ |
| Sx | 27.5 | in³ |
| Zx | 30.4 | in³ |
| rx | 3.47 | in |
| Iy | 37.1 | in⁴ |
| Sy | 9.27 | in³ |
| Zy | 14.1 | in³ |
| ry | 2.02 | in |
Other sizes in the W8 series
Relevant tools
- Steel Shape Properties Table
search and compare W8x31 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