Interpretation ID: 1985-02.35

TYPE: INTERPRETATION-NHTSA

DATE: 05/29/85

FROM: AUTHOR UNAVAILABLE; Jeffrey R. Miller; NHTSA

TO: Mr. R. David Hawkins

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. R. David Hawkins Laboratory Technician Failure Analysis Associates 10899 Kinghyrst, Suite 245 Houston, Texas 77099

Dear Mr. Hawkins:

This responds to your letter asking about Federal Motor Vehicle Safety Standard No. 207, Seating Systems. You asked whether buses are excluded from the requirements of section S4.2, section S4.3, and/or the static testing procedures of section S5. You also asked whether there are any other standards which provide criteria for the testing of seating systems on buses.

Section S2 of Standard No. 207 provides that the standard applies to buses (among other vehicle types). Section S4.2, General performance requirements, provides that "(w)hen tested in accordance with S5., each occupant seat other than a side-facing seat or a passenger seat on a bus, shall withstand" specified forces. Passenger seats on a bus are thus excluded from the requirements of section S4.2. However, the driver's seat on a bus is not excluded from the requirements of that section. The testing procedures of section S5 are only relevant to seats which are subject to the general performance requirements of section S4.2.

Similarly, section S4.5, Restraining device for hinged or folding seats or seat backs, provides that "(e)except for a passenger seat in a bus or a seat having a back that is adjustable only for the comfort of its occupants, a hinged or folding occupant seat or occupant seat back shall" meet specified requirements. Passenger seats on a bus are thus excluded from the requirements of section S4.3. Assuming that a hinged or folding occupant seat or occupant seat back were provided for the driver, it would not be excluded from the requirements of that section unless it had a back that was adjustable only for the comfort of its occupant.

With respect to your last question, Federal Motor Vehicle Safety Standard No. 222, School Bus Passenger Seating and Crash Protection, specifies criteria for the testing of school bus passenger seats. That standard is not applicable to buses other than school buses. The agency does not have any other standards which provide criteria for testing seating systems of buses.

Sincerely, Jeffrey R. Miller Chief Counsel Failure Analysis Associates

March 6, 1985 Mr. Steve Wood Office of Chief Counsel National Highway Traffic Safety Administration 400 Seventh St., S.W. Washington, D.C. 20590

Re: Our File No. HS30089

Dear Mr. Wood:

In regard to our recent phone conversation, I am sending this following list of questions pertaining to Motor Vehicle Safety Standard No. 207. This standard deals specifically with seating systems--passenger cars, multipurpose passenger vehicles, trucks, and buses. The purpose and scope of this standard is to "establish requirements for seats, their attachment assemblies, and their installation to minimize the possibility of failure by forces acting on them as a result of vehicle impact".

1. Am I correct in assuming that buses are excluded from: the general performance requirements (S4.2), restraining device for hinged or folding seats or seat backs (S4.3), and also excluded from the static testing procedures outlined in (S5)?

2. If buses are indeed excluded from all of the above, are there any other standards which provide criteria for the testing (visual, static, or dynamic) of seating systems on buses?

Thanks for your attention to this matter.

Sincerely, R. David Hawkins Laboratory Technician RDH:cdk