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
7. Hangers: Ceiling hangers shall be limited to a maximum load of 1800# each. Hangers
shall be spaced at a maximum of 10-foot centers, and, in general, shall be located at the
discretion of the Installer except where specific requirements are shown on the drawings.
All hanger connections shall be double nutted with flat washer and lock washer, if bolted,
or have similar safeguards to avoid loosening from vibration. Header steel shall be
installed horizontally; tilted header steel is not acceptable. All header steel beam
connections shall be double nutted with flat washer and lock washer. Threaded rod shall
be installed perpendicular to the conveyor support/sill; bowed threaded rod is not
acceptable. Vibration isolators shall be provided for BHS and catwalk system. Vibration
isolators shall be the combination spring and double deflection LDS hanger type by
Mason Industries, Inc. or as acceptable to The Authority.
8. Padding: Provide 1-inch thick foam rubber pipe insulation on all conveyor supports,
conveyor edges, or any other new or existing equipment located less than 6’-8” above
catwalks and above conveyor where catwalk is not provided adjacent to the conveyor.
9. Painting:
a. All structural parts, except those surfaces coated with a hot-dig galvanized coating,
and those that would normally be unpainted (such as rollers, shafts, sprockets,
bearings, chains, nameplates, etc.) shall be painted with two shop coats of
rust-inhibiting enamel or shall be electrostatic powder coating. This includes all
support structure, bed underside, drive structure and pulley guards, etc. Paint the
chain guards OSHA “yellow”.
b. The conveyor bed surface or the interior surface of sideguards shall be electrostatic
powder coated as described below or as acceptable to The Authority.
1) Electrostatic Powder Coating Application: All surfaces to be painted shall
be thoroughly cleaned of rust, scale, oil, grease, grit, welding flash, and
other forms of dirt. Paint shall be an epoxy-type powder coat. Paint shall be
applied as an electrostatic spray to a film thickness of 1.5 – 2.5 mils and
cured at a minimum of 350 degrees Fahrenheit for 10 minutes. Finish shall
conform to ASTM D3363 with a hardness of 3H, and shall conform to
ASTM D3359B, with an adhesion and cross hatch rating of 5B PASS.
c. Paint OSHA “yellow” at each location of catwalk elevation change.
10. Shrouding:
a. Shrouding shall be provided for conveyor equipment located in public areas as
shown on the drawings. The shrouding shall be formed stainless steel, minimum
12-gauge, Type 304 with #4 brushed finish running longitudinally. All
connections shall be smooth and flush without openings.
b. All joints between stainless steel sections shall be uniform with adjacent surfaces
properly aligned. Tolerances of joint width and surface alignment shall not exceed
1/16” per foot, which shall not be accumulative. Joints shall align properly, where
joint meet and are parallel with each other.
c. Where stainless steel shrouding requires a laminated substrate for stiffness, the
substrate shall be laminated on all surfaces for stabilization and moisture control to
prevent warpage.
BAGGAGE HANDLING EQUIPMENT 34 77 16 - 41