Chamberlain 4142DC Manual Del Usuario página 17

ONE-PIECE DOOR WITHOUT TRACK
1. Close the door and mark the inside vertical centerline of your
garage door. Extend the line onto the header wall above door,
as shown.
If headroom clearance is minimal, you can install the header
bracket on the ceiling. See page 18.
If you need to install the header bracket on a 38 mm board
(on wall or ceiling), use lag screws (not provided) to securely
fasten the 38 mm board to structural supports as shown.
2. Open your door to the highest point of travel as shown.
Measure the distance from the top of the door to the floor.
Subtract the actual height of the door. Add 20 cm to the
remainder. (See Example.)
3. Close the door and draw an intersecting horizontal line on the
header wall at the determined height.
NOTE: If the total number of centimeters exceeds the height
available in your garage, use the maximum height possible, or
refer to page 18 for ceiling installation.
Distance from top of door
(at highest point of travel) to floor ...................................... 234 cm
Actual height of door .........................................................-224 cm
Remainder ............................................................................ 10 cm
Add ..................................................................................... +20 cm
Bracket height on header wall ............................................. =30 cm
(Measure UP from top of CLOSED door.)
Proceed to Step 2, page 18.
EXAMPLE
Vertical
Header Wall
Centerline
Header Wall
Door
Jamb
Hardware
One-piece door without track:
jamb hardware
17
Unfinished
Ceiling
Structural
Supports
38 mm
Board
38 mm Board
CEILING MOUNT
HEADER BRACKET
Vertical
Centerline
of Garage
Door
Highest Point
of Travel
Floor
Highest Point
of Travel
Header Wall
Door
Pivot
One-piece door without track:
pivot hardware
OPTIONAL
FOR
Floor