Standard Bus Procurement Guidelines - APTAStandards.com

More documents

Recommendations

Info

Standard Bus Procurement Guidelines 5.4.1.4 CORROSION protect them against graffiti and vandalism. The specific requirements for the treatment of exterior surfaces are defined in Section 5.4.3 and interior surfaces in Section 5.4.4. The bus shall resist corrosion from atmospheric conditions and road salts. It shall maintain structural integrity and nearly maintain original appearance throughout its service life, provided it is maintained by the Procuring Agency in accordance with the procedures specified in the Contractor’s service manual. All exposed surfaces and the interior surfaces of tubing and other enclosed members shall be corrosion resistant. All materials that are not inherently corrosion resistant shall be protected with corrosion-resistant coatings. All joints and connections of dissimilar metals shall be corrosion-resistant and shall be protected from galvanic corrosion. Representative samples of all materials and connections shall withstand a 2-week (336-hour) salt spray test in accordance with ASTM Procedure B- 117 with no structural detrimental effects to normally visible surfaces, and no weight loss of over 1 percent. 5.4.1.5 RESONANCE AND VIBRATION All structure, body, and panel-bending mode frequencies, including vertical, lateral, and torsional modes, shall be sufficiently removed from all primary excitation frequencies to minimize audible, visible, or sensible resonant vibrations during normal service. 5.4.1.6 FIRE PROTECTION The passenger and engine compartments shall be separated by a bulkhead(s) that shall, by incorporation of fireproof materials in its construction, be a firewall. This firewall shall preclude or retard propagation of an engine compartment fire into the passenger compartment and shall be in accordance with the Recommended Fire Safety Practices defined in FTA Docket 90, dated October 20, 1993. Only necessary openings shall be allowed in the firewall, and these shall be fireproofed. Any passageways for the climate control system air shall be separated from the engine compartment by fireproof material. Piping through the bulkhead shall have copper, brass, or fireproof fittings sealed at the firewall with copper or steel piping on the forward side. Wiring may pass through the bulkhead only if connectors or other means are provided to prevent or retard fire propagation through the firewall. Engine access panels in the firewall shall be fabricated of fireproof material and secured with fireproof fasteners. These panels, their fasteners, and the firewall shall be constructed and reinforced to minimize warping of the panels during a fire that will compromise the integrity of the firewall. 5.4.1.7 DISTORTION The bus, loaded to GVWR and under static conditions, shall not exhibit deflection or deformation that impairs the operation of the steering mechanism, doors, windows, passenger escape mechanisms and service doors. Static conditions shall include the vehicle at rest with any one wheel or dual set of wheels on a 6-inch curb or in a 6-inch deep hole. Technical Specifications 148 10/18/07
Standard Bus Procurement Guidelines 5.4.2 STRUCTURE The structure of the bus shall be designed to withstand the transit service conditions typical of an urban duty cycle throughout its service life. The Design Operating Profile defined in Section 5.1.2 shall be considered for this purpose. The Structure of the bus shall have undergone appropriate structural testing and analysis, including Altoona testing, to ensure adequacy of design for the urban transit service. 5.4.2.1 TOWING Towing devices shall be provided on each end of the bus. Each towing device shall withstand, without permanent deformation, tension loads up to 1.2 times the curb weight of the bus within 20 degrees of the longitudinal axis of the bus. The rear towing device(s) shall not provide a toehold for unauthorized riders. The front towing devices shall allow attachment of a rigid tow bar and shall permit lifting and towing of the bus, at curb weight, by the towing devices and the tow bar until the front wheels are clear of the ground. The rear tow eyes shall permit lifting and towing of the bus for a short distance, such as in cases of an emergency. The method of attaching the tow bar shall require the specific approval of the Procuring Agency prior to submittal of bids/proposals. Each towing device shall accommodate a crane hook with a 1-inch throat. 5.4.2.2 JACKING It shall be possible to safely jack up the bus, at curb weight, with a common 10-ton floor jack when a tire or dual set is completely flat and the bus is on a level, hard surface, without crawling under any portion of the bus. Jacking from a single point shall permit raising the bus sufficiently high to remove and reinstall a wheel and tire assembly. Jacking pads located on the axle or suspension near the wheels shall permit easy and safe jacking with the flat tire or dual set on a 6-inch-high run-up block not wider than a single tire. Jacking and changing any one tire shall be completed by a 2M mechanic helper in less than 30 minutes from the time the bus is approached. The bus shall withstand such jacking at any one or any combination of wheel locations without permanent deformation or damage. 5.4.2.3 HOISTING The bus axles or jacking plates shall accommodate the lifting pads of a 2-post hoist system. Jacking plates, if used as hoisting pads, shall be designed to prevent the bus from falling off the hoist. Other pads or the bus structure shall support the bus on jack stands independent of the hoist. 5.4.2.4 FLOOR 5.4.2.4.1 Design The floor shall be essentially a continuous flat plane, except at the stepwells and wheel housings. Where the floor meets the walls of the bus, the surface edges shall be blended with a circular section of radius not less than 1 inch, and a molding or cove shall prevent debris accumulation between the floor and wheel housings. Technical Specifications 149 10/18/07
Page 1:
American Public Transit Association
Page 6 and 7:
Standard Bus Procurement Guidelines
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111: Standard Bus Procurement Guidelines
Page 118 and 119: 1. 2. 3. 4. 5. 6. 7. 8. Standard Bu
Page 120 and 121: 1. 2. Standard Bus Procurement Guid
Page 159: Standard Bus Procurement Guidelines
Page 209: Standard Bus Procurement Guidelines
show all

Standard Bus Procurement Guidelines - APTAStandards.com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?