Interpretation ID: nht78-1.37

DATE: 01/26/78

FROM: AUTHOR UNAVAILABLE; J. J. Levin, Jr.; NHTSA

TO: Sheller-Globe Corporation

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your December 6, 1977, letter asking which portions of the roof and sidewall structure of your small bus must comply with the head impact requirements of Standard No. 222, School Bus Passenger Seating and Crash Protection.

In accordance with the head impact zone requirements outlined in paragraph S5.3.1.1 of the standard, the National Highway Traffic Safety Administration has determined that those portions of your bus constituting the bus sidewall and window structure are not required to comply with the head impact requirements. Only those portions of your bus which constitute part of the roof structure are included within the head impact zone requirements. We have marked in yellow on the enclosed drawing those areas that must comply with the head impact requirements.

SINCERELY,

SHELLER-GLOBE CORPORATION Vehicle Planning and Development Center

December 6, 1977

National Highway Traffic Safety Administration

Attention: Chief Counsel, Frank A. Berndt

Gentlemen:

Reference is made to S.5.3.1.1. of FMVSS 222 - School Bus Seating and Crash Protection, which states the bus sidewall, window, or door structure are not included in the impact zone.

Our question is, what all do you consider as window structure and if a side body pillar and the structure over the top of the window assembly to which the window is mounted, are also not included in the impact zone? The pillar and structure in question are marked in red for the Dodge and blue for a Chevrolet on drawing #K-4300021.

It would be appreciated if you would indicate on the extra copy of the drawing area needing or not needing to be included in the impact zone.

R. M. Premo - Director Vehicle Safety Activities