Anti-kickup or anti-jump: This anti-jump cam component is fitted between the door and hanger to prevent the hanger from jumping off of the track. Typically a rubber or nylon part. 

Aprons: Made of 2 pieces that sit on the front and back of the door and sandwiches the top. It connects the door to the trucks that sit inside the sliding track.

Arrowhead style: A decorative style of flat track hanger or swinging door hinge that resembles an arrowhead.

Astragals: An astragal is an attachment placed on the edges of a door and is designed to create a seal that prevents air leaks, water, noise, light or debris from entering.

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.

Ball-bearing trucks: Friction resistant ball bearings that provide increased durability, make ball-bearing trucks the choice for applications that require a high frequency of use. 

Bi-Parting Doors: Bi-Parting doors are 2 doors that slide open from a central vertex on a pair of identical track. 

Bow Handle: A metal loop or arch forming a handle affixed to a door for opening and closing.

Box track: A sliding door track that is enclosed and allows for some protection of the wheels or trucks from debris or weather. Good for medium to heavy-duty applications.

Bracket: A bracket is a steel holder which affixes the track to a surface and prevents it from moving about. Track can be attached to both a wall and the ceiling. 

Bumper shoes: Bumper shoes are guard covers made from steel that are 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. 

Capacity: The amount of weight a track assembly can hold, typically speaking of door weight.

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 a unique patented device 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 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.

Delrin wheels: Delrin wheels are extremely durable plastic wheels. These wheels are especially effective in applications where excessive water or other liquids is present.

Disc-bearing: Disc bearing hinges are made for medium volume use. Recommended for doors that will be opened/closed less than 25 times per day. 

Door Stop: A fixed object that can be attached to the wall or floor. Its main purpose is to stop the door from traveling further than required and prevent damage by colliding into the door or wall.

Door top plate: A door top plate is a mounting pad for the pintle bolt that holds the wheels inside the track.

End blind: A U-shaped cap inserted into the ends of the box track to prevent the build-up of debris, rodent or bird nests, or any other disturbance to the rolling of the sliding hangers.

Flat track: Sliding door track that is a flat piece of steel most often used for lighter weight or interior doors.

Fire Doors: A fire door is a door with a fire-resistant coating used to separate compartments from one another as a part of a passive fire protection system.

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. 

Hanger assembly: Component that connects to the top front of the door and holds the door on the track. There are multiple hanger designs. 

Head clearance: Head clearance is the space between the top of your opening to the ceiling. RW hardware allows for different height head clearances.

Hinge Backplates: A plate that is used by through-bolting strap hinges to a non reinforced door made of wood or hollow metal. The back plate 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

Jamb: A side post or surface of a doorway, window, or fireplace.

Lag bolt: Also called lag screws are generally used to connect heavy lumber and other materials that bear an intense load.

Lock-Joint: Positive interlocking track joint brackets that prevent horizontal track slippage or separation. Easy mechanical install without welding.

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 swinging door page for more information.  

Offset hinges: Offset hinges are preferred when your door and door frame is not parallel and either your door, or door frame extends out further than the other.

Overhead Mounting: The process of mounting a door system to the ceiling. Typically overhead mounting refers to a type of bracket which holds the door track in place.

Padlock Staple or Hasp: A slotted metal plate that forms part of a fastening for a door and the latch is place over and secured by a lock.

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 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 use of ultraviolet light. 

Sidewall Mounting: Sidewall mounting refers to attaching a door system to the wall. Sidewall mounting is also a type of bracket which secures door track in place.

Slide fold: Slide fold kits are closet door style doors. It is made of sliding box track and door hinges that allows for the doors to slide open and fold and the end of the track.

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 back plate and bolts, and attached to the pintle using a pivoting pin/bearing.

Tandem truck assembly: The tandem truck assembly is 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.  

Timber frame: A specific type of post and beam construction using heavy and stout wood timber held together by mortise and tenon joinery.

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.

Track Stop: A component that is mounted inside the track and stops the door from going past a certain point, or stops the door from sliding off of the track.

Truck or Hanger: A weight bearing component with wheels designed to be attached to the sliding door along a piece of track or rail.

Weathersweep or Weather Strip: Weathersweep is used along the bottom of the doors. Designed to seal off the bottom of the door that would leak air, water, noise, light, and debris.