attachment 2 section i ? technical specifications commuter coach ...

7. Seat numbers will be supplied
2.6 PEDESTRIAN SAFETY
Page 8
ATTACHMENT 2
Exterior protrusions greater than ½-inch and within 80 inches of the ground shall have a radius no less
than the amount of the protrusion. The left and right side rear view mirrors, windshield washer nozzles
and required lights and reflectors are exempt from the protrusion requirement. Grilles, doors, bumpers
and other features on the sides and rear of the coach shall be designed to minimize the ability of
unauthorized riders to secure toeholds or handholds.
2.7 STRUCTURE
2.7.1 STRENGTH AND FATIGUE LIFE
The structure shall be of a sufficiently strong and efficient design to withstand the conditions of transit
service throughout the service life of the coach. The design shall incorporate all severe service, heavyduty
features available from the contractor.
Any manufacturer whose bus is or has been involved in a structurally related fleet failure (number of
failures exceeding ten percent (10%) of the fleet) in any transit property in the U.S. in the last six (6)
years or who has been directed by the National Highway Transportation Safety Administration to make
repairs of any bus must have completed a detailed investigation of the failure, a detailed structural
analysis of the complete bus structure to rule out related defects on any part of the structure, and shall
supply a complete copy of the corrective actions to be undertaken. All failures involving basic body,
structure, axles, and suspension are considered structural related failures for the purposes of this
specification.
The investigation of a failure and structural analysis must be carried out by a reputed independent
Transit Industry Consultant and shall not be limited to finite element analysis or appropriate test but
shall be confirmed by an actual track test evaluation with suitable time concentration to demonstrate the
ability of the modified structure to perform for the specified 500,000.
2.7.2 DISTORTION
The coach at GVWR and under static conditions, shall not exhibit deformation or deflection that
impairs operation of doors, windows, or other mechanical elements. Static conditions 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.
2.7.3 RESONANCE
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.
2.7.4 MATERIAL