A simple table will help you determine the designation of casing frames and frames for sliding doors on the wall.
1) First, measure the wall thickness at all construction openings. You can find out how to proceed here.
2) Compare the measured values for each specific construction opening with the data in the column labeled "optimal range (cm) for wall thicknesses" and select the designation that corresponds to the appropriate row.
| Frame designation (cm) | Optimal range (cm) for wall thickness | Maximum range (cm) for wall thickness | |
| 8 | 8.0 - 8.9 | 8.0 - 8.9 | |
| 9 | 9.0 - 9.9 | 9.0 - 9.9 | |
| 10 | 10.0 - 10.9 | 9.5 - 11.4 | |
| 11 | 11.0 - 11.9 | 10.5 - 12.4 | |
| 12 | 12.0 - 12.9 | 11.5 - 13.4 | |
| 13 | 13.0 - 13.9 | 12.5 - 14.4 | |
| 14 | 14.0 - 14.9 | 13.5 - 15.4 | |
| 15 | 15, 0 - 15, 9 | 14, 5 - 16, 4 | |
| 16 | 16, 0 - 16, 9 | 15, 5 - 17, 4 | |
| 17 | 17, 0 - 17, 9 | 16, 5 - 18, 4 | |
| 18 | 18, 0 - 18, 9 | 17, 5 - 19, 4 | |
| 19 | 19, 0 - 19, 9 | 18, 5 - 20, 4 | |
| 20 | 20, 0 - 20, 9 | 19, 5 - 21, 4 | |
| 21 | 21, 0 - 21, 9 | 20, 5 - 22, 4 | |
| 22 | 22, 0 - 22, 9 | 21, 5 - 23, 4 | |
| 23 | 23, 0 - 23, 9 | 22, 5 - 24, 4 | |
| 24 | 24, 0 - 24, 9 | 23, 5 - 25, 4 | |
| 25 | 25, 0 - 25, 9 | 24, 5 - 26, 4 | |
| 26 | 26, 0 - 26, 9 | 25, 5 - 27, 4 | |
| 27 | 27, 0 - 27, 9 | 26, 5 - 28, 4 | |
| 28 | 28, 0 - 28, 9 | 27, 5 - 29, 4 | |
| 29 | 29, 0 - 29, 9 | 28, 5 - 30, 4 | |
| 30 | 30, 0 - 30, 9 | 29, 5 - 31, 4 | |
| 31 | 31, 0 - 31, 9 | 30, 5 - 32, 4 | |
| 32 | 32, 0 - 32, 9 | 31, 5 - 33, 4 | |
| 33 | 33, 0 - 33, 9 | 32, 5 - 34, 4 | |
| 34 | 34, 0 - 34, 9 | 33, 5 - 35, 4 | |
| 35 | 35, 0 - 35, 9 | 34, 5 - 36, 4 | |
| 36 | 36, 0 - 36, 9 | 35, 5 - 37, 4 | |
| 37 | 37, 0 - 37, 9 | 36, 5 - 38, 4 | |
| 38 | 38, 0 - 38, 9 | 37, 5 - 39, 5 | |
| ... | ... | ... |
Example: For a wall thickness of 12.2 cm, choose a frame with the designation 12, because the measured wall thickness falls within the optimal range of 12.0 - 12.9 cm.