Interpretation ID: nht76-3.42

DATE: 03/23/76

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Titan Trailer Corporation

TITLE: FMVSS INTERPRETATION

TEXT: This responds to Titan Trailer Corporation's March 2, 1976, question whether certain bulk grain and feed meal trailers manufactured by Titan qualify as bulk agricultural commodity trailers that are permitted until June 30, 1976, to meet emergency and parking brake requirements other than those specified in S5.6 and S5.8 of Standard No. 121, Air Brake Systems.

Sections S5.6 and S5.8 provide that a trailer manufactured before June 30, 1976, that is designed to transport bulk agricultural commodities in off-road harvesting sites and to a processing plant or storage location, as evidenced by skeletal construction that accommodates harvest containers, a maximum length of 28 feet, and an arrangement of air control lines and reservoirs that minimizes damage in field operations, is entitled to a specified option.

From the descriptive material enclosed, it appears that the Titan models 92 and 24 are designed for field use and conform to the criteria of skeletal construction that accomodates a harvest container, despite the fact that the container is permanently attached to the frame that surrounds it. It is not clear that the trailers are not more than 28 feet in length, or that the design positions air lines and reservoirs to minimize field-related damage. Assuming that the length, air lines, and reservoirs do meet these criteria, it appears that the trailers would qualify for the manufacturer option under S5.6 and S5.8.

YOURS TRULY,

Titan Trailer corp.

March 2, 1976

Frank Burndt Acting Chief Counsel

On December 5, 1975, the NHTSA published an amendment to FMVSS 121 on page 235 of volume 40 of the Federal Register. This amendment exempted certain bulk agricultural commodity trailers from the parking brake requirements which had heretofore necessitated the use of spring brakes.

We manufacture a hopper trailer designed exclusively to haul bulk agricultural products. These trailers are frequently drawn through fields at harvest time by farm tractors - the conditions upon which the spring brake exemption was granted.

Several of our competitors, manufacturing similar hopper trailers, have told potential customers that these trailers are included under the spring brake exemption.

We would like to receive an official communication from your office as to whether or not these hopper trailers are covered under the spring brake exemption granted to agricultural commodities. To assist you in making this decision, we have enclosed photographs and a sales brochure pertaining to our hopper trailers.

Since our material orders and our sales will be strongly influenced by your response, we would greatly appreciate a prompt reply to this letter. Please feel free to contact me at (916) 662-3941 should you have any questions.

Thomas M. Tucker Assistant Manager