OnePiece Single Panel Garage Door Extension Spring Replacement The following instructions demonstrate how to replace extension springs on a onepiece single panel garage door On this garage door, there was no opener If you have an opener, you will need to disengage the opener and unplug the power to the openerDOOR CONSTRUCTION A major benefit of onepiece type garage doors is the ability to maintain architectural integrity in the construction of the garage and garage door In addition, the one piece style allows for more involved designs on the door facade compared to sectional doorsCompatible with plugtype, lockendtype, and clipend springs Designed for use with twocar, onepiece garage doors that require 2 springs on ea Compatible with one piece garage doors Makes springs easier to install Replaces the oldstyle chain Installs with just a One piece garage doors residential