Garage doors installed with double track low headroom hardware with liftmaster 8500 garage door openers.
Reverse garage doors with low headroom installation.
Used when there is at least the door height plus 12 of headroom clearance.
2 track headroom door height 12 required sideroom 4 5 required backroom 23 required.
51 mm to standard lift movements.
3 track headroom door height 12 required sideroom 5 5 required backroom 23 required.
When equipping a garage door with an electric door opener add 2 in.
On the other hand if there is only 4 in.
For door heights with 41 2 of headroom not listed in table 1 take height of door in inches and subtract 12 for 12 radius or 151 2 for 15 radius to get reduced vertical track length.
How to install a low headroom garage door by yourself.
7 high doors installed with double track low headroom hardware will.
This option helps provide more vertical space in the garage.
Actual opening vehicle clearance is open ing height minus 6 e g.
How to install a low headroom garage door by yourself.
121 mm to 12 in.
Dealer said this was not possible.
304 mm available it is best to use a dual track system designed for low headroom.