Attachment 1: Specifications - Metropolitan Washington Airports ...

DCA TERMINAL A IMPROVEMENTS (NEAR TERM)10 AUGUST 2012
TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN
RONALD REAGAN WASHINGTON NATIONAL AIRPORT
PROJECT DT1203
order from the downstream end. Systems shall not start up under any
circumstances without activating the start-up warning system sequence.
3) System Stop (Auto):
a) Automatic stopping of each system shall be accomplished through a
“last bag” photosensor located at the discharge end of each loading
belt. Each time the system is started and when a bag interrupts the
photosensor beam, the timing logic shall be reset. After a time
interval sufficient to ensure that all bags in transit on the conveyor
line have reached their destination, the timing logic shall time out and
the transport conveyor shall stop and the security/fire door shall close.
The security/fire door closing function shall be on an adjustable timer
(0 to 5 minutes) in the programming of the system.
b) Cascade Stop: When the system detects a downstream conveyor stop,
the preceding conveyor and the upstream conveyors shall continue to
operate until the head-end photosensor, which controls the associated
conveyors, detects a bag. At that time, that conveyor shall stop. The
next upstream conveyor shall continue to operate until that head-end
photosensor’s beam is blocked. This action shall continue until the
most upstream conveyor is stopped. During the cascade stop
condition, the cascaded conveyors shall remain stopped for safety
purpose even if their associated head-end photosensors are cleared.
4) Load Conveyor Stop: Provide STOP pushbuttons in the control stations at
the load conveyor. STOP pushbuttons when pressed shall immediately stop
the conveyors at and upstream of the security/fire door and shall close the
security/fire door immediately.
5) System Stop (Emergency):
a) The curbside system may be stopped anytime during the normal
operation by depressing one of the maintained-contact
emergency-stop (E-STOP) buttons which are to be located adjacent to
the belt conveyors. E-STOP push-buttons shall be located at a
maximum of twenty-five (25) foot intervals along the conveyors. If a
control station containing an E-Stop is more than twenty-five (25)
feet away, an additional E-Stop control station must be provided to
comply with this requirement. E-Stop pushbutton shall be provided
in every control station containing a START/RESTART and/or JAM
RESET pushbutton. Zoning of E-Stop shut down shall be as
identified herein.
b) When one or more E-Stop buttons are depressed, all conveyors within
this associated E-Stop zone as identified herein shall be stopped and
the red visual beacons and audible alarm shall be activated at the
MCP and in the field. When the E-Stop pushbutton is depressed, the
red light shall flash on the actuated E-Stop pushbutton and all E-Stop
pushbuttons in the E-Stop zone shall be illuminated solid. After
clearing the emergency, the system shall be restarted by resetting the
actuated E-Stop pushbutton and then pressing the START/RESTART
pushbutton. Resetting the E-Stop pushbutton shall extinguish the
BAGGAGE HANDLING EQUIPMENT 34 77 16 - 30