Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
Standard Bus Procurement Guidelines - APTAStandards.com
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<strong>Standard</strong> <strong>Bus</strong> <strong>Procurement</strong> <strong>Guidelines</strong><br />
exceed 2 inches, measured at the aisle side of the seat. Structural failure of any part of the seat or<br />
sidewall shall not introduce a laceration hazard.<br />
The seat assembly shall withstand static vertical forces of 500 pounds applied to the top of the seat<br />
cushion in each seating position with less than 1/4-inch permanent deformation in the seat or its<br />
mountings. The seat assembly shall withstand static horizontal forces of 500 pounds evenly distributed<br />
along the top of the seat back with less than 1/4-inch permanent deformation in the seat or its mountings.<br />
The seat backs at the aisle position and at the window position shall withstand repeated impacts of two<br />
40-pound sandbags without visible deterioration. One sandbag shall strike the front 40,000 times and<br />
the other sandbag shall strike the rear 40,000 times. Each sandbag shall be suspended on a 36-inch<br />
pendulum and shall strike the seat back 10,000 times each from distances of 6, 8, 10, and 12 inches.<br />
Seats at both seating positions shall withstand 4,000 vertical drops of a 40-pound sandbag without<br />
visible deterioration. The sandbag shall be dropped 1,000 times each from heights of 6, 8, 10, and 12<br />
inches. Seat cushions shall withstand 100,000 randomly positioned 3-1/2-inch drops of a squirming,<br />
150-pound, smooth-surfaced, buttocks-shape striker with only minimal wear on the seat covering.<br />
The back of each transverse seat shall incorporate a handhold no less than 7/8 inch in diameter for<br />
standees and seat access/egress. The handhold shall not be a safety hazard during severe decelerations.<br />
The handhold shall extend above the seat back near the aisle so that standees shall have a convenient<br />
vertical assist, no less than 4 inches long that may be grasped with the full hand. This handhold shall not<br />
cause a standee using this assist to interfere with a seated 50th-percentile male passenger. The handhold<br />
shall also be usable by a 5th-percentile female, as well as by larger passengers, to assist with seat<br />
access/egress for either transverse seating position. The seat back handhold may be deleted from seats<br />
that do not have another transverse seat directly behind and where vertical assist is provided in<br />
accordance with Section 5.4.5.2. Armrests shall not be included in the design of transverse seats.<br />
Longitudinal seats shall be the same general design as transverse seats but without seat back handholds.<br />
Longitudinal seats may be mounted on the wheelhouses. Armrests shall be included on the ends of each<br />
set of longitudinal seats except on the forward end of a seat set that is immediately to the rear of a<br />
transverse seat, the operator's barrier, or a modesty panel and these fixtures perform the function of<br />
restraining passengers from sliding forward off the seat. Armrests are not required on longitudinal seats<br />
located in the wheelchair parking area that fold up when the armrest on the adjacent fixed longitudinal<br />
seat is within 1-1/2 to 3-1/2 inches of the end of the seat cushion. Armrests shall be located from 7 to 9<br />
inches above the seat cushion surface. The area between the armrest and the seat cushion shall be closed<br />
by a barrier or panel and shall be constructed and trimmed to <strong>com</strong>plement the modesty panels. The top<br />
and sides of the armrests shall have a minimum width of 2 inches and shall be free from sharp<br />
protrusions that form a safety hazard.<br />
Seat back handhold and armrests shall withstand static horizontal and vertical forces of 250 pounds<br />
applied anywhere along their length with less than 1/4-inch permanent deformation. Seat back handhold<br />
and armrests shall withstand 25,000 impacts in each direction of a horizontal force of 125 pounds with<br />
less than 1/4-inch permanent deformation and without visible deterioration.<br />
A certified test report shall be provided as evidence of <strong>com</strong>pliance with all of the requirements defined<br />
above. The test report shall contain a record of all testing activities, test diagrams, testing equipment, as<br />
well as test data related to loads, deflections and permanent deformation of the seat assembly. The<br />
report shall include a statement of <strong>com</strong>pliance with the requirements of this section of Part 5: Technical<br />
Specifications.<br />
Technical Specifications 164 10/18/07
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