Interpretation ID: nht68-3.28

DATE: 04/24/68

FROM: AUTHOR UNAVAILABLE; David A. Fay; NHTSA

TO: Schein Body and Equipment Company

TITLE: FMVSS INTERPRETATION

TEXT: Thank you for your letters of February 29, 1968, to Dr. William Haddon, Jr. concerning the location of lamps and reflectors on your dump semi-trailers and equipment loaders.

Initial Motor Vehicle Safety Standard No. 108 requires that the side reflex reflectors be mounted not less than 15 inches nor more than 60 inches above the road surface. To meet this requirement, the front side reflex reflectors on your dump semi-trailers may be mounted below the side rail of the body. If necessary, a protective shield or housing could be provided to prevent the reflector from being damaged by rocks and mud.

With respect to the location of rear clearance lamps on your dump semi-trailers, Standard No. 108 requires that these lamps be located as near as practicable to the upper left and right extreme edges of the vehicle, except that optional heights are permitted when the rear identification lamps are mounted at the extreme height of the vehicle. Your photograph does not show identification lamps on the rear of your trailer; however, it does not appear that these lamps could be mounted at the extreme height of the vehicle, since the tail gate is often removed. In this case, the rear clearance lamps must be located as near as practicable to the upper left and right extreme edges of the vehicle. It appears that clearance lamps located immediately forward of the rear post of a point not obscured by the covering tarpaulin would meet this requirement of the standard. A combination clearance and rear side marker lamp at that location would also be permitted by the standard.

On your tilt type and roll-back equipment loaders, location of tail, stop, turn signal, and identification lamps 30 inches from the extreme rear of the platform, and location of the rear clearance lamps and rear reflectors 44 inches from the extreme rear of the platform, appear to be in accordance with the location requirements of Standard No. 108.

With respect to the requirements of Standard No. 108, I must point out that this Bureau does not issue approvals on items of lighting equipment or on vehicle designs incorporating this equipment. Therefore, the above comments are for your information only and in no way relieve the vehicle manufacturer from his responsibility for certifying that the assembled vehicle meets the requirements of the standard.