Apta (Draft) Specification For: 30-ft, 35-ft, 40-ft, 45-ft, 60-foot (articulated) Transit Buses
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- IP 54.Driver’s side window
- IP 55.Side windows
- 55.2Emergency exit (egress) configuration
53.1GlazingThe windshield glazing material shall have a 1/4 in. (6 mm) nominal thickness laminated safety glass conforming to the requirements of ANSI Z26.1 Test Grouping 1A and the Recommended Practices defined in SAE J673. Default
Shaded band The upper portion of the windshield above the driver’s field of view shall have a dark, shaded band with a minimum luminous transmittance of 5 percent when tested in accordance to ASTM D-1003. Alternative
The driver’s view, perpendicular through operator’s side window glazing, should extend a minimum of 33 in. (840 mm) to the rear of the heel point on the accelerator, and in any case must accommodate a 95th percentile male operator. The view through the glazing at the front of the assembly should begin not more than 26 in. (560 mm) above the operator’s floor to ensure visibility of an under-mounted convex mirror. Driver’s window construction shall maximize ability for full opening of the window. The driver’s side window glazing material shall have a 1/4 in. nominal thickness laminated safety glass conforming with the requirements of ANSI Z26.1-1996 Test Grouping 2 and the Recommended Practices defined in SAE J673. The design shall prevent sections from freezing closed in the winter. Light transmittance shall be 75 percent on the glass area below 53 in. from the operator platform floor. On the top fixed over bottom slider configuration, the top fixed area above 53 in. may have a maximum 5 percent light transmittance. Default
Alternative Hidden frame (flush “Euro-look”) driver’s side window [Agency to choose from the following options.]
Alternative Quick change operator’s side window Glazing in the window assembly shall be replaced without removing the window from its installed position on the bus or manipulation of the rubber molding surrounding the glazing. The glazing shall be held in place mechanically by a formed metal extruded ring constructed to last the life of the vehicle. Standard driver’s side window, traditional frame [Agency to choose from the following options.]
Hidden frame (flush “Euro-look”) driver’s side window [Agency to choose from the following options.]
IP 55.Side windows55.1ConfigurationSide windows shall not be bonded in place, but shall be easily replaceable without disturbing adjacent windows and shall be mounted so that flexing or vibration from engine operation or normal road excitation is not apparent. All aluminum and steel material will be treated to prevent corrosion. 55.2Emergency exit (egress) configurationDefault Minimum egress All side windows shall be fixed in position, except as necessary to meet the emergency escape requirements. Alternative
Every window shall be capable of being made an egress window Default
Alternative Quick change passenger-side windows Designed and constructed to enable a 3M mechanic to remove and replace the glazing in less than 5 minutes. Glazing in the window assembly shall be replaced without removing the window from its installed position on the bus or manipulation of the rubber molding surrounding the glazing. The glazing shall be held in place mechanically by a formed metal extruded ring constructed to last the life of the vehicle. default
Alternative Hidden frame (flush “Euro-look”) [Agency to choose from the following options.]
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