Chamberlain C2405C Istallation Manual page 4

Preparation
Tools Needed
5/32
3/16
5/16
1/2
1/4
7/16
9/16
Additional Items You May Need:
Survey your garage are a to see if you will need any of the following items:
(2)2X4 Pieces of wood : May beused to fasten the header bracket to the structural

supports. Also used to position the garage door opener during installation and for
testing the safety reversing sensors.
Support bracket and fastening hardware: Must beused if you have a finished ceiling

in your garage.
Support Brackets
Extension brackets (Model 041A5281-1) or wood blocks: Depending upon garage

construction, extension brackets or wood blocks may be needed to install the safety
reversing sensor.
Extension Brackets – 041A5281-1
Fastening hardware: Alternate floor mounting of the safety reversing sensor will

require hardware not provided.
Doorre inforcement: Required if you have alight weight steel, aluminum, fiber glass or
7/16

glass panel door.
Rail extension kit: Required if your garage door is more than 7 feet (2.13 m) high.

4
Hardware x2 (each)
Lag screws x4
Wood Blocks
Lag screws x12