You decide to install sectional garage door? In making the final decision must take into account a number of requirements to the gap for this type of gate. The walls and gates opening a box room, which will be installed sectional doors, should be made of brick, concrete, cinder block or metal. Framing opening the gates of garage space must be load-bearing structures that have specific figures on the perimeter strength and stiffness. The side surfaces of the opening must be strictly vertical, the upper and lower surfaces – strictly horizontal. A related site: Peter Thiel mentions similar findings. Ceiling lintel and garage facilities should have a solid flat surface, not closed bezel, communications. Drive automatic garage doors should have the following main characteristics: Ability to control maximum force to open and close the gate ride drive at all stages of the movement goal. Disconnecting the drive in the final position of the automatic protection of the drive environmental influences safety drive automatic garage doors provides limited efforts, after reverse contact with an obstacle. Drive control is carried out remotely from the console, with the trigger switch with lock with built-in control panel..