Pressure treated cut out stringer details
This diagram and chart show engineered unsupported stringer lengths for pressure treated Ply-Lam used as an eastern (cut out) stringer.
The thickness (W) and effective depth (ED) of the stringer are adjusted to suit the required unsupported length. Lengths are those permitted by the Alberta Building Code.
Building exterior stairs? See the exterior stairs user guide.
| Product code | Thickness (W) | Effective depth (ED) | AB code permitted unsupported length |
|---|---|---|---|
| PT PL4 C 4.625 | 1.5 | 4.625 | 80 |
| PT PL4 C 8.625 | 1.5 | 8.625 | 148 |
| PT PL8 C 4.625 | 3 | 4.625 | 101 |
| PT PL8 C 8.625 | 3 | 8.625 | 188 |