A look at your floor will reveal the finer details. The door threshold poses a problem for walkers, wheelchairs and the like. Another point to consider is the width of the door. This needs to be wider in order to accommodate walking aids.
These and other aspects are stipulated in the basic standard for barrier-free construction and planning of DIN 18040. A patio or balcony door is considered barrier-free if it is:
- Easy to operate
- The door handle is not too high: ideally at a height of between 85 to 105 centimeters
- There is no threshold, or alternatively, the door threshold may not exceed two centimeters in height
- It is wide enough
- There is sufficient space in front of the door