Step 1: Door Opening Width
Step 2: Door Opening Height
Step 3: Headroom
Note: Standard Lift doors require a minimum of 12″ of over door height. Not enough headroom? Don’t worry. Raynor’s Low Headroom Front Mount Springs package reduces the height requirement to 8-1/4″ of over door height, while Low Headroom Rear Mount Springs require as little as 4″ (plus 2″ with motor operator).
Step 5: Backroom
Note: The minimum backroom requirements are as follows:
Standard Lift—door height + 26″
Low Headroom Front Mount Springs – door height + 20″
Low Headroom Rear Mount Springs – door height + 29″
Step 6: Obstructions
Note: Obstructions are defined as entry doors or other objects that will interfere with the garage door track or the operation of a garage door. The nearest obstruction may be something such as pipes, support beams, heating ducts, lighting, etc. Obstructions must be taken into consideration in the headroom, side room, and backroom measurements.