For frontal working positions and in case of small to large covers.
To prevent the cover boxes from jumping out of the guideways, on the upper side special retaining slides are mounted, designed for fitting exactly the profile of the guideways.
Depending on the space available and the shape and position of the guides, the cover can be mounted frontally from above or it may be necessary slided onto the guides.
In case of frontal covers between two carriages, their design must consider the frontal mounting from above.