Cut out (eastern) stringer details
This diagram and chart show engineered unsupported stringer lengths for 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.
| Product code | Thickness (W) | Effective depth (ED) | AB code permitted unsupported length |
|---|---|---|---|
| Spruce 2x12, cut out, 5.25 in remaining | 1.5 | 5.25 | 99 |
| Spruce 2x10, cut out, 3.5 in remaining | 1.5 | 3.5 | 69 |
| PL3 C 3.5 | 1.125 | 3.5 | 55 |
| PL3 C 5.25 | 1.125 | 5.25 | 78 |
| PL3 C 8.625 | 1.125 | 8.625 | 135 |
| PL4 C 3.5 | 1.5 | 3.5 | 60 |
| PL4 C 4.625 | 1.5 | 4.625 | 80 |
| PL4 C 5.25 | 1.5 | 5.25 | 86 |
| PL4 C 8.625 | 1.5 | 8.625 | 148 |
| PL6 C 3.5 | 2.25 | 3.5 | 71 |
| PL6 C 4.625 | 2.25 | 4.625 | 95 |
| PL6 C 5.25 | 2.25 | 5.25 | 107 |
| PL6 C 8.625 | 2.25 | 8.625 | 177 |
| PL8 C 3.5 | 3 | 3.5 | 76 |
| PL8 C 4.625 | 3 | 4.625 | 101 |
| PL8 C 5.25 | 3 | 5.25 | 114 |
| PL8 C 8.625 | 3 | 8.625 | 188 |
Shaded rows are solid spruce, shown for comparison.