Code Alarm SRT 5500 Specifications Page 34

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December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-34
in-place gussets. The bolts are precision torqued and coated with a thread-
locking compound.
b. Body and understructure shall be adequately reinforced at all joints and points
where stress concentration may occur so that the vehicle will carry the required
loads and properly withstand road shocks.
c. The entire coach understructure, including the wheelhouses, shall be spray
coated with PPG Corashield 7972 taupe undercoating, or approved equal.
d. All interior and exterior metal surfaces shall be cleaned and treated to prevent
rust and/or corrosion. After welding in areas where primer was previously
applied, all joints shall be brushed to eliminate foreign matter and then the joint
shall be cleaned with a phosphorus solution to provide a good base for good
paint adhesion. Finally, the joint shall be painted with red oxide primer.
e. Aluminum panels shall be properly prepared and primed before final paint. All
bolts, nuts, washers, clamps, clips, and similar parts, shall be zinc or cadmium
plated or phosphate coated to prevent corrosion.
f. All exterior body seams, joints and overlapping panels shall be sealed against
entry of water or dust. Where dissimilar metals meet, proper care shall be taken
to prevent electrolytic corrosion.
g. All material used in the body and chassis, including cross members, posts and
panels, shall be of the required strength for the purpose intended and shall be
properly treated to resist corrosion. All joints exposed to weather shall be made
tight against leakage.
15.2 Construction: Chassis
a. Understructure shall consist of structural stainless steel for maximum durability,
reduced maintenance, and weight and improved corrosion resistance. It shall be
welded and Huck bolted throughout.
b. Conventional bolt construction shall be with Grade 8 (traceable) hardware, and
shall be used only where necessary to allow for routine disassembly (e.g., the
closing crossmember shall be bolted to allow for engine removal at overhaul). No
movement at bolted joints shall be allowed.
c. Understructure at the coach sides in the lowered floor area shall have crash
protection consisting of continuous minimum 3/16” steel plate at an angle which
will tend to cause an impacting vehicle to subvert. The crash protective steel
plate shall be an integral, welded part of the structure, continuous between the
wheelwells except for the exit door. Effectiveness of the design shall be
documented by successful application of crashworthiness test. Results of such
testing shall be submitted prior to delivery of first coach, and must meet the
standards set forth in Federal Register Volume 47, No. 195, Section 2.1.2.10.
d. Understructure at the front and rear overhang (defined as the distance between
axle centerline and bumpers) shall be sufficiently robust to permit towing or lifting
without special rigging being required. The design shall be verified by submission
of those part of the STRUAA (Altoona Test) which address towing/recovery.
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