Glossary of Terms

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AAADM
The American Association of Automatic Door Manufactures.

ADA
The Americans with Disabilities Act of 1990.

ANSI
American National Standard Institute.

ANSI A156.10
The industry standards for power operated pedestrian doors. Published by the American National Standard Institute.

ANSI A156.19
The industry standards for power assist and low energy door operators. Published by the American National Standard Institute.

ACTIVE AREA
The area or zone where motion or presence is detected.

ACTIVATION
When a sensing device or mat signals the door's control box to perform a specific action or function.

ACTUATION
See ACTIVATION

ACTUATOR
See OPERATOR

AIR LOCK
A vestibule in which only one door (or set of doors) can be opened at a time.

APPROACH MAT
The activating control mat placed in the usual approach side of a door.

APPROACH SENSOR
The activating control sensing device placed in the usual approach side of a door.

ARM
See DRIVE ARM

BACK CHECK
See OPEN CHECK

BELT DRIVE OPERATOR
A door operator, which utilizes a gear box and pulley system, to move a belt (usually nylon) as a means of power transmission.

BI-PARTING SLIDING DOORS
Two sliding door panels, moving in opposite directions, but providing one door opening.

BREAKOUT
See PANIC BREAKOUT

CLEAR OPENING
The normal clear opening width, when the door is in the normal full open position.

CLOSING CYCLE
When an automatic door moves from its full open position towards its full closed position.

CLOSING CHECK POSITION
The position of the door's travel where its speed is reduced prior to reaching the full closed position. Must be at least the last 2" (51 mm) of closing travel for a sliding door and the 10 degrees of closing travel for a swinging door.

CLOSING CHECK SPEED
The reduced rate of speed a door travels, during its final closing travel.

CLOSING SPEED
The rate of speed a door travels towards its full closed position.

CONTROL BOX
An electronic device which regulates and controls the door's operator.

COVER
A removable panel or case to provide service access to the door operator.

CYCLE, CLOSING
The entire travel distance and time elapsed, while a door moves from the full open position to the full closed position.

CYCLE, OPENING
The entire travel distance and time elapsed, while a door moves from the full closed position to the full open position.

DOOR ARM
See DRIVE ARM

DOOR LIGHT or DOOR LITE
The area of a door panel glazed with glass.

DOOR STILE
(No, not style) The vertical structural component of a door's edge. Narrow door stiles are about 2" wide, medium door stiles are about 4" wide and wide door stiles are about 5" wide.

DOOR RAIL
The horizontal structural component of a door's top and bottom edge. Typically a narrow stile door has a 4" bottom rail, a medium or wide stile door typically has a 6" bottom rails. High bottom rails are typically 10".

DRIVE ARM
The mechanical device, connecting the operator to the door, which transmits motion.

ELECTRO-MECHANICAL OPERATOR
A self contained door operator which uses an electric motor in conjunction with a gear box (transmission) as a means of transmitting locomotion to a door.

ELECTRO-HYDRAULIC OPERATOR
A self contained door operator which utilizes an electric motor in conjunction with a pump and piston.

FLOOR MOUNTED OPERATOR
Door operator which is installed at or below the floor surface; usually a hydraulic door operator.

GLASS GUARD
A grille or bar mounted on the door to protect the glass from damage caused by impacts.

GUARD BAR
See GLASS GUARD

GUIDE RAIL
Traffic control device used to move pedestrians around and away from a door's travel arc. Also used to direct pedestrian traffic through a door opening in a perpendicular travel path.

HEADER CASE
An enclosure used to conceal and mount a door operator.

HOLD-OPEN BEAM
A photo electric light mounted across the threshold area of a door, used to keep the door in the open position when the threshold area is occupied.

HYDRAULIC OPERATOR
Door operator which utilizes a cylinder and piston powered by compressed fluid. The pump (or power pack) for a hydraulic operator is usually mounted in a remote location. Hydraulic lines or hoses are used to supply pressurized fluid to the operator.

KNOWING ACT
An intentional means of activating a door operator. i.e. wall switch, card reader, ceiling mounted pull cord switch, etc.

LATCH JAMB
The door's jamb (frame) opposite the hinges. Usually the side the door latches on.

LATCH CHECK POSITION
See CLOSING CHECK POSITION

LATCH CHECK SPEED
See CLOSING CHECK SPEED

LEFT HAND DOOR
A door hinged on the left side, which swings into a building space.

LEFT HAND REVERSE DOOR
A door hinged on the left side, which swings out of a building space.

LEFT HAND TRAFFIC
Traffic pattern through a vestibule or an entrance in which traffic enters and exits the door through the left side.

LINTEL
Supporting structure over the top of a doorway.

LINEAR DRIVE
Gearless mechanical transmission which converts rotary motion of a drive shaft to linear motion.

LOW ENERGY DOOR OPERATOR
Automatic door operator which opens a door under low power and slow speed. Usually used at accessible entrances for the disabled. Low energy door operators are usually both manually operable and automatic.

MASONRY OPENING
Opening in a brick, stone or concrete wall into which a door or window is to be installed. Also see ROUGH OPENING.

MAT, ACTUATION
Means of activating an automatic door with a floor contact (weight sensitive) mat.

MAT, SAFETY
Means of preventing a closed door from opening or a full open door from closing with a floor contact (weight sensitive) mat.

MEETING STILE
For a pair of doors within a single frame opening; the vertical door edges that meet in the center of the opening.

MOTION SENSOR
Electronic device which detects motion and sends an actuation signal to a door operator. Microwave motion sensors detect motion by the Doppler shift (radar) principle. Passive infra-red motion detectors detect a heat differential moving through a detection grid. Motion sensors are usually microwave units.

MUNTIN BAR
The horizontal mid-rail in a door panel, usually dividing the door's glass into two pieces.

OPENING CYCLE
When an automatic door moves from its full open position towards its full closed position.

OPENING CHECK
The final travel position just before the door reaches its full open position. The door's opening speed is reduced when in open check.

OPENING CHECK POSITION
The position of the door's travel where its speed is reduced prior to reaching the full open position.

OPENING CHECK SPEED
The reduced rate of speed a door travels, during its final opening travel.

OPENING SPEED
The rate of speed a door travels towards its full open position.

OVERHEAD CONCEALED OPERATOR
An automatic door operator which is concealed in a housing directly over the top of the door.

PANIC BREAKOUT
1) When doors which normally swing in the direction of ingress are forced to swing in the emergency egress direction.
2) When sliding doors are forced to swing out in the emergency egress direction.

PHOTO CELL
Actuation switch which sends a signal to the door's control mechanism, when the path of a light beam is interrupted by a person or an object.

PHOTO BEAM
See PHOTO CELL

PNEUMATIC OPERATOR
Automatic door operator which is powered by compressed air in a piston cylinder.

POWER ASSIST DOOR OPERATOR
A mechanism which reduces the amount of force required to manually operate a door. Power assist doors do not open a door for traffic.

POWER ASSIST CLOSE
When the door operator's motor (or other type of power system) is used to assist the door operator's closing spring. Usually at locations with very high winds and/or building stack pressures.

POWER CLOSE
When the door operator's motor (or other type of power system) is used to close the door. Power close door operators do not have closing springs.

POWER OPEN
When the door operator's motor (or other type of power system) is used to open the door.

POWER UNIT
Pump (hydraulic or air) used to power a door operator. Power units are usually installed in a remote building location, with lines or hoses to the door operator.

PRESENCE DETECTOR
Electronic device which detects presence inside a detection zone and sends a operating signal to the door's control mechanism. Ultra-sonic presence detectors use sound waves (sonar) to detect presence. Active infra-red presence detectors use invisible light reflecting off a person or an object within the detection zone.

PULL CORD SWITCH
Ceiling mounted switch which is activated by pulling a chain or cord.

PUSH TO OPEN PUSH TO CLOSE
Operation of an automatic door which requires the user to activate a switch to open the door. The door remains open, until the user activates a switch to close it.

RATCHET CONTROL
See PUSH TO OPEN PUSH TO CLOSE

RECYCLE
The reversing of a door's travel, prior to reaching its full closed position.

RIGHT HAND DOOR
A door hinged on the right side, which swings into a building space.

RIGHT HAND REVERSE DOOR
A door hinged on the right side, which swings out of a building space.

RIGHT HAND TRAFFIC
Traffic pattern through a vestibule or an entrance in which traffic enters and exits the door through the right side.

ROUGH OPENING
Opening in a wall into which a door or window is to be installed. Also see MASONRY OPENING

SAFETY BEAM
See HOLD-OPEN BEAM

SINGLE SLIDE
Automatic sliding door with a single moving door panel.

SELF CONTAINED OPERATOR
A door operator which requires no external power unit. See POWER UNIT.

SPRING CLOSE
An automatic door which uses a spring to return the door to the closed position.

STILE
See DOOR STILE

STRIKE JAMB
See LATCH JAMB

SURFACE MOUNTED OPERATOR
Door operator mounted onto the surface of the top door jamb and the structure above the door.

SYNCHRONIZED OPERATORS
Operators which open a pair of doors simultaneously with the same (usually closely matched) operating speeds.

TELESCOPING SLIDING DOOR
Sliding door with two or more door panels traveling in the same direction.

TIME DELAY, CLOSING
The length of time a door remains fully open, after the actuation signal is removed.

TOUCHLESS SWITCH
Actuation switch which requires a user to place their hand near the switch device, but does not require the user to touch or push.

TRANSOM MOUNTED OPERATOR
See SURFACE MOUNTED OPERATOR.

UNKNOWING ACT
An unconscious means of activating a door, such as a motion sensor or presence detector.

VISIBLE MOUNTED OPERATOR
See SURFACE MOUNTED OPERATOR

 

Page last updated Monday, August 20, 2012
by Charles F. Vetter