Design and Construction Handbook - Los Angeles World Airports

Guide Specification
C. Door Control Device
1. Door Protection – Electronic Entrance Detector Screen: Provide an electronic door
detector device and or approved equal, which projects a three dimensional infrared
curtain of light guarding the door opening. Arrange to reopen doors if one beam of the
curtain is penetrated. Unit shall have transmitters and receivers spaced at a minimum
distance to provide the maximum amount of protection within the height of the doorway.
Systems, which have the availability to turn Off or On individual zones within the
curtain, will not be allowed.
2. Nudging Operation: After beams of door control device are obstructed for a
predetermined time interval (minimum 20.0 – 25.0 seconds), a warning signal shall sound
and doors shall attempt to close with a minimum of 2.5 foot pounds kinetic energy.
Activation of the door open button shall override nudging operation and reopen doors.
3. Interrupted Beam Time: When beams are interrupted during initial door opening, hold
door open a minimum of 3.0 seconds. When beams are interrupted after the initial
3.0 second hold time, reduce time doors remain open to an adjustable time of
approximately 1.0 – 1.5 seconds after beams are reestablished.
4. Differential Door Time: Provide separately adjustable timers to vary time that doors
remain open after stopping in response to calls.
a. Car Call: Hold open time adjustable between 3.0 and 5.0 seconds.
b. Hall Call: Hold open time adjustable between 5.0 and 8.0 seconds.
2.7 HOISTWAY EQUIPMENT
A. Guide Rails
1. Guides shall be steel T-section rails. Rail surfaces shall be machined smooth to ensure
proper operation of guides. Rail ends shall be accurately machined with tongue and
matching groove centrally located on web. Non wearing rail surfaces are to be painted in
color selected by the Architect/LAWA.
2. Guides shall be joined and installed in accordance with Section 2.23 of the Code.
3. Guide rails are not to be in view from within the elevator cab.
B. Car Buffers: Oil type with blocking and support for car contract speeds exceeding 200 fpm.
Spring type for speeds of 200 fpm or less.
C. Counterweight Buffers: Oil type with blocking and support for contract speeds exceeding
200 fpm. Spring type for speeds of 200 fpm or less.
D. Roller Guides: Roller guides shall be mounted on top and bottom of the car and counterweight
frames to engage the guide rails. Provide slide guides with renewable oil less inserts where C3
loading is required.
E. Suspension Means: If steel core ropes are supplied, a means to provide constant lubrication
shall be provided.
HEAVY DUTY TRANSIT TYPE MACHINE ROOM-LESS ELEVATORS
14 21 00 - 13 Elevators, Escalators and Moving Walks