Ball-bearing strap hinge: Ball bearing hinges are higher durability hinges due to the presence of friction-resistant ball bearings within them. Ball-bearing hinges are considered heavy-duty hinges because this friction resistance makes it easier to use the hinges over a longer period of time.
Bumper shoes: Bumper shoes are guard covers made from steel that is affixed to the bottom corners of a door. They provide extra protection from slamming and damaging the door material. A bumper shoe will connect with an End Stop which is screwed to the floor.
Butt Hinge: Sometimes known as a mortise hinge, a butt hinge is constructed of two matching straps connected by a pin and barrel system. One side of the butt hinge is routed into the door and the other is attached to an adjacent door or frame.
Caged-bearing: The ball-bearing cage used in a sliding box track rolling wheels of the hanger or truck. The cage holds the ball bearings together in symmetrical radial spacing. The design is intended to extend the life and accommodation of frequently used door traffic. Caged bearings may be lubricated for ease of use and longevity.
Carriage house: A carriage house is large enough to accommodate a horse-drawn carriage. Modernly, they can be used as an upscale version for a garage, separate from the home, or can be made into a small home itself.
Crank arm operator: A gear or sprocket-driven device, turned by a handle to open or close shift doors or remote doors on animal enclosures. These are unique patented devices manufactured by Richards-Wilcox for use in zoos and kennels for the safety of the handlers.
Cremone bolts: A fastening device used on double doors that has surface-mounted vertical rods running the length of the door that move up and down simultaneously to release or secure the top and bottom of the door into a plate embedded into the door frame.
Cross ear mounting bracket: A cross ear mounting bracket is made for when your mounting structure is not going to be parallel with your track. It allows for your track to go whichever direction you want it to go.
Crowding Door Hardware: Crowding gate doors are built inside large animal facilities such as veterinary or zoos. They are to help move animals down a channel or hallway from one area to another with the safety of both handlers and animals in mind.
Flush Pull or bypass door pull: A simple recessed pull or metal cupping handle that is inlaid into the door material that lies flush on sliding doors. Bypass door pulls, most often used where the distance or clearance is very minimal. Used where a handle that protrudes out is not suitable.
Fusible links: Fusible links provide a heat-activated mechanism that assures positive closing of doors, windows, hatchways, dampers, and blowers. The links fuse when their rated temperature is reached, releasing the open door to block the path of the fire.
Galvanized: Galvanization is the process of adding a layer of zinc to steel or iron to protect against rust. The most frequently used method is hot-dip galvanizing where parts are submerged entirely in a bath of hot molten zinc.
Hinge Backplates: A plate that is used by through-bolting strap hinges to a nonreinforced door made of wood or hollow metal. The backplate distributes the clamping force of the fasteners over a larger surface area preventing damage to the door.
Industrial strap hinge: See description on 434 hinges
Maximum Door Weight: The maximum door mass that can be supported by the door hardware system.
Moment: “Moment” refers to the measure of the turning force on an object, such as a hinge. Calculating the moment can be done by multiplying the Door Weight by the Door Width. Example: 1,500 lbs x 4 feet = 5,000 FT/LBS of Moment. See the swinging door hardware page for more information.
Pintle: We refer to a pintle as one of the major components of a strap hinge. It’s generally the smaller section that is fastened to the door jamb and attaches to the strap of the hinge using a pivoting pin/bearing.
Pivot Actuator: A pivot actuator is a device used for remote actuation of doors/caging. It’s a fixed-length pivot arm attached to another arm mounted to the actuated door. The pivot arm can be pulled or pushed to control the door, and pivoted to move the arm so as not to interfere with any hallway, etc.
Powder coating: A more environmentally friendly process of coating for metal parts that is applied as a sprayed, dry powder. It is applied electrostatically and cured by being placed under heat or the use of ultraviolet light.
Strap hinge: A door hinge with two long straps connected by a rotating axis in the middle. The rotating axis or pintle allows the strap hinge to open and close; one strap is fastened to the surface of the moving door and the other is fastened to the adjacent stationary frame. They are exceptionally strong and durable.
Strap: The strap is a major component of a strap hinge. It’s generally the larger section that is attached to the door front, fastened with a backplate and bolts, and attached to the pintle using a pivoting pin/bearing.
Tandem truck assembly: The tandem truck assembly is the same thing as a regular truck assembly except that it has 4 wheels instead of two and is built exclusively for high capacity doors in conjunction with 888 track.
Top mount or Top Hung: Top mounting hangers for sliding doors that screw to the top of the door and do not show any apron over the front to the door. All of the weight is taken by the top mount bracket at the top of the door.