The table below will help you determine the correct dimensions of the construction opening (its width and height).
When using a sliding system, it is necessary to consider higher requirements for the flatness of the construction opening, meaning that the sliding system requires a straight wall and floor.
| Nominal frame width / cm | Dimension A / mm | Dimension B / mm | Dimension C / mm | Construction opening WxH / mm |
| 60 | 600 | 742 | 1370 | 690 x 2020 |
| 70 | 700 | 842 | 1570 | 790 x 2020 |
| 80 | 800 | 942 | 1770 | 890 x 2020 |
| 90 |