Interpretation ID: nht94-1.37

TYPE: Interpretation-NHTSA

DATE: February 2, 1994

FROM: Scott Slaughter -- Pitts Enterprises, Inc.

TO: Marv Shaw -- Chief Counsel, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 4/5/94 from John Womack to Scott Slaughter (A42; VSA 102)

TEXT:

Pitts Trailers, Inc. is a trailer manufacturer that specializes in trailers for the logging industry. One particular model we manufacture is called a knuckle boom loader trailer. I have enclosed copies of brochures as well as some advertisements, so th at you might better understand the use of this model. This trailer stays in the woods (off the highway) the majority of its lifetime. The knuckle boom operation must be moved from time to time to different site locations, at which times it will be on hig hways and may cross state lines. The gross vehicle weight of this trailer is 24,000 lbs.

I am writing this letter to request an official interpretation to determine if my trailer (the knuckle boom model only) is subject to the safety standards (FMVSS Standards) with particular attention to include such questions as conspicuity, auto slacks, brakes on all wheels and marker lights. We are particularly interested in your opinion as to whether brakes are required on all wheels. Also, please advise us if our trailers are defined as motor vehicles or are they merely mobile equipment which see v ery limited highway use, solely for the purpose of moving to a new job site.

I hope I have provided you with sufficient information for an official interpretation. If not, please feel free to contact me.

Thank you for any light you can shed on this matter.

(Brochure omitted.)