W21x55 — Dimensions and Section Properties
Dimensions and key properties
- Weight
- = 55 lb/ft
- A
- = 16.2 in²
- d
- = 20.8 in
- Ix
- = 1,140 in⁴
- Sx
- = 110 in³
- Zx
- = 126 in³
- rx
- = 8.4 in
- ry
- = 1.73 in
Section properties
| Property | Value | Unit |
|---|---|---|
| Weight | 55 | lb/ft |
| A | 16.2 | in² |
| d | 20.8 | in |
| bf | 8.22 | in |
| tf | 0.522 | in |
| tw | 0.375 | in |
| Ix | 1,140 | in⁴ |
| Sx | 110 | in³ |
| Zx | 126 | in³ |
| rx | 8.4 | in |
| Iy | 48.4 | in⁴ |
| Sy | 11.8 | in³ |
| Zy | 18.4 | in³ |
| ry | 1.73 | in |
Other sizes in the W21 series
Relevant tools
- Steel Shape Properties Table
search and compare W21x55 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