Request for Proposal [insert date]
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- TS 1.1.35Seat Pan Cushion Length
- TS 1.1.36Seat Pan Cushion Slope
- TS 1.1.37Seat Base Fore/Aft Adjustment
- TS 1.1.38Seat Pan Cushion Width
- TS 1.1.41Headrests Default Adjustable headrest. Alternative No headrest. TS 1.1.42Seat Back Lumbar Support
- TS 1.1.43Seat Back Angle Adjustment
Windshield WashersThe windshield washer system, when used with the wipers, shall deposit washing fluid evenly and completely wet the entire wiped area. The windshield washer system shall have a minimum 3-gallon reservoir, located for easy refilling from outside of the bus. Reservoir pumps, lines and fittings shall be corrosion-resistant and must include a means to determine fluid level. Driver’s Seat
DimensionsThe driver’s seat shall be comfortable and adjustable so that people ranging in size from a 95th-percentile male to a 5th-percentile female may operate the bus. TS 1.1.35Seat Pan Cushion LengthMeasurement shall be from the front edge of the seat pan to the rear at its intersection with the seat back. The adjustment of the seat pan length shall be no less than 16.5 in. at its minimum length and no more than 20.5 in. at its maximum length.
Default Dimensions Measurement shall be from the cab floor to the top of the level seat at its center midpoint. The seat shall adjust in height from a minimum of 14 in., with a minimum 6 in. vertical range of adjustment.
H-Point
The reference point for seat height shall be determined by establishing the H-point. TS 1.1.36Seat Pan Cushion SlopeMeasurement is the slope of the plane created by connecting the two high points of the seat, one at the rear of the seat at its intersection with the seat back and the other at the front of the seat just before it waterfalls downward at the edge. The slope can be measured using an inclinometer and shall be stated in degrees of incline relative to the horizontal plane (0 degrees). The seat pan shall adjust in its slope from no less than plus 12 degrees (rearward “bucket seat” incline), to no less than minus 5 degrees (forward slope). TS 1.1.37Seat Base Fore/Aft AdjustmentMeasurement is the horizontal distance from the heel point to the front edge of the seat. The minimum and maximum distances shall be measured from the front edge of the seat when it is adjusted to its minimum seat pan depth (approximately 15 in.). On all low-floor buses, the seat-base shall travel horizontally a minimum of 9 in. It shall adjust no closer to the heel point than 6 in. On all high-floor buses, the seat base shall travel a minimum of 9 in. and adjust no closer to the heel-point than 6 in. TS 1.1.38Seat Pan Cushion WidthMeasurement is the horizontal distance across the seat cushion. The seat pan cushion shall be 17 to 21 in. across at the front edge of the seat cushion and 20 to 23 in. across at the side bolsters. TS 1.1.39Seat SuspensionThe driver’s seat shall be appropriately dampened to support a minimum weight of 380 lbs. The suspension shall be capable of dampening adjustment in both directions. Rubber snubbers shall be provided to prevent metal-to-metal contact. TS 1.1.40Seat BackWidth Measurement is the distance between the outermost points of the front of the seat back, at or near its midpoint in height. The seat back width shall be no less than 19 in. Seat back will include dual recliner gears on both sides of the seat. Height Default
Standard height seat back. TS 1.1.41HeadrestsDefault Adjustable headrest. Alternative No headrest. TS 1.1.42Seat Back Lumbar SupportMeasurement is from the bottom of the seat back at its intersection with the seat pan to the top of the lumbar cushioning. The seat back shall provide adjustable depth lumbar back support with three individual operating lumbar cells within a minimum range of 7 to 11 in. TS 1.1.43Seat Back Angle AdjustmentThe seat back angle shall be measured relative to a level seat pan, where 90 degrees is the upright position and 90 degrees-plus represents the amount of recline. The seat back shall adjust in angle from a minimum of no more than 90 degrees (upright) to at least 105 degrees (reclined), with infinite adjustment in between. Seat BeltThe belt assembly should be an auto-locking retractor (ALR). All seat belts should be stored in automatic retractors. The belts shall be mounted to the seat frame so that the driver may adjust the seat without resetting the seat belt. The seat and seat belt assemblies as installed in the bus shall withstand static horizontal forces as required in FMVSS 207 and 210. Default Lap seat belt only. Default Seatbelt webbing shall be black in color. Alternative Lap and Shoulder (Three-Point) Seat Belt Seat belts shall be provided across the driver’s lap and diagonally across the driver’s chest. The driver shall be able to use both belts by connecting a single buckle on the right side of the seat cushion. 3-pt seatbelts must be emergency locking retractor (ELR) in design.
Adjustable-height D-ring. Alternative All seatbelt assemblies shall come equipped with a warning switch device to remind operators to buckle up. Alternative Orange three-point seatbelt webbing. Lap Belt Length Default
72 in. The lap belt assembly shall be a minimum of 72 in. in length. Alternative 72 in. with Extension The lap belt assembly shall be 72 in. in length with an 8-in. extension
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