Also known as a Double Acting Hinge. Double acting spring hinges allow the door to open 180 degrees in either direction and spring action returns door to center closed position. Saloon Door Hinges is another name for these hinges. Spring tension is adjustable. The manufacturer recommends using three hinges per door for heavier doors. Two hinges may be used for lighter doors. If three hinges are used the center hinge should be installed as close as possible to the top hinge for maximum support. "Size" is the height of the plate that mounts on the door and jamb. 4" Model Gap if not mortised: .283" Door thickness range: 7/8" to 1-1/8" Weight rating per two hinges: 60 lbs with a max. door width of 2'4" Weight rating per three hinges: 75 lbs with a max. door width of 3' 5" Model Gap if not mortised: .297" Door thickness range: 1-1/8" to 1-1/2" Weight rating per two hinges: 65 lbs with a max. door width of 2'8" Weight rating per three hinges: 100 lbs with a max. door width of 3' 6" Model Gap if not mortised: .325" Door thickness range: 1-1/4" to 1-3/4" Weight rating per two hinges: 75 lbs with a max. door width of 2'8" Weight rating per three hinges: 125 lbs with a max. door width of 3'
