Heavy Duty Hinges
Heavy duty hinges are used for heavy doors and gates, particularly in industrial and agricultural settings. They are generally made of steel, stainless steel, or sometimes aluminum.
Heavy duty hinges are constructed in a number of different designs. The simplest type of hinge is a butt hinge, a hinge with two rectangular leaves and three screw holes in each leaf. Butt hinges are installed in a recess called a mortise. Two butt hinges are used for one door.
In addition to butt hinges, several other varieties of heavy duty hinges are available. The continuous hinge, also called a piano hinge, is cut to support the entire length of a door. They support heavy doors evenly because every knuckle is a load-bearing point. Strap hinges, in comparison, are made of heavy-gauge metal, usually stainless steel, and mounted on the front of a heavy door. Slip-joint hinges are another type of hinges that are used for quick and easy door removal. Slip-joint hinges consist of a male leaf with a pin and a female leaf with no pin.