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
a. All take-up pulleys shall be a minimum of 4” in diameter, steel, trapezoidal faced
and equipped with taper-lock hubs and 1-7/16” minimum diameter AISI 1018
C.R.S. shafts mounted in eccentric locking-type precision and ground flange-type
ball bearing units. Pulleys shall be mounted on threaded take-up devices with steel
guides and a minimum of 6” adjustment. All conveyors shall be provided with
take-ups for field adjustment of a minimum of 2% of the conveyor bed length.
Take-ups shall be an integral part of the drive frames on all intermediate-drive
conveyors.
b. All conveyor sections in excess of 50’ in length operating in tunnels or outside of
the building subject to extreme temperature and humidity' changes shall be
equipped with automatic take-up devices.
c. All take-ups used in heavy-duty or high-speed applications shall be the same as
above except shall be of 6” diameter with 1-7/16” diameter shafts.
9. Bearings:
a. Each roller/pulley shall be equipped with a pair of proper duty type bearings. The
bearings shall be Dodge ABHS bearings, Eccentric Collar Ball bearings or as
acceptable to The Authority.
b. All bearings shall be lubed for life (66% grease fill) with pipe plug and pop-in end
cover. Bearings shall be mounted on the outside of the conveyor frame unless
clearance restrictions prohibit.
c. All exposed bearings in work areas shall be equipped with bearing covers and meet
OSHA requirements for employee safety. Bearing covers shall be provided on all
conveyors that are in tenant work areas, accessible to tenant personnel; in public
areas, and accessible to the public.
d. Bearings shall have a minimum L-10 life of 70,000 hours based on the service and
loading of conveyors and on the manufacturer's published data showing load rating
of each bearing used.
e. Bearings shall be greased when installed per manufacturer’s recommendations.
D. Chutes and Slides: Where a chute or slide is indicated on the drawings or is required, it shall be
constructed of 10 gauge min. galvanized steel for the bed and the sideguards shall be 12 gauge
min. hot-rolled steel. Sideguards shall be 18 inches high and reinforced with stiffeners spaced
at 40” maximum on center.
E. Power Turns and Spiral Turns:
1. Turns shall be steel frame construction, shall be ‘C’ size and the width shall match the
width between sideguards of the adjacent downstream conveyor. Belt speed of turns, as
measured on the centerline, shall be at least as fast as the input conveyor and the same
speed or slower than the output conveyor.
2. Manufacturers offering products in conformance to the specifications are:
F. Belting:
a. FLOmaster Division of Portec, Inc.
b. Or as acceptable to The Authority.
BAGGAGE HANDLING EQUIPMENT 34 77 16 - 38