From the lowest point of the ceiling to the top of the opening) for commercial installations is as follows: opening height, handheld up to 2440mm, headroom required 460mm.
We have 1 Gliderol Glidermatic GTS Optima manual available for free PDF download: Owner's Manual.
Manually operated single skin roller doors should operate freely in either the opening or closing direction.
This feature is known as auto reverse and is outlined in the owners manual.
A facia panel can be supplied where the headroom clearances are not fully available, but this will reduce the opening height of the door.
Gliderol roller doors fitted with Glidermatic or Rolamatic operators are designed with an inherent safety device which will detect any obstruction in the path of a closing door and reverse the direction of the door.