Interpretation ID: aiam2617
Director of Engineering
Great Dane Trailers
Inc.
Lathrop Avenue
P.O. Box 67
Savannah
GA 31402;
Dear Mr. Storz: This is in response to your letter of May 5, 1977, concerning a vehicl manufacturer's responsibilities with regard to overloading.; You make a reference to a November 10, 1976, letter from the Nationa Highway Traffic Safety Administration (NHTSA) which stated that manufacturers must take reasonable steps to ensure that the vehicles they produce will not be overloaded by their users. Although we acknowledge that a manufacturer does not have direct control over the actual use of its vehicles, it does exercise indirect control over use through the vehicle's design.; The NHTSA has stated in the past that a vehicle's gross vehicle weigh rating (GVWR) is determined by the sum of its unloaded vehicle weight, 150 pounds for each designated seating position, and its rated cargo load. It is the cargo load rating that is most relevant to the problem of overloading. The rated cargo load should represent the manufacturer's assessment of the vehicle's cargo-carrying capacity and the maximum load at which the vehicle may be safely operated. A manufacturer must consider the maximum load capacity of the vehicle when it designs its cargo-carrying portion. If this is not done, the rated cargo load, and thus the GVWR, may be meaningless since the vehicle may have a cargo-carrying chamber which, if filled, would cause the vehicle to exceed its stated weight ratings. An illustration of such a situation would be a tanker truck which exceeds its GVWR when the tank is filled with a type of material appropriate for carrying in that cargo area. If the manufacturer could reasonably have anticipated that such cargo would be carried in the tanker, yet rated the vehicle with a GVWR which was less than the vehicle's weight when fully loaded with that cargo, a safety-related defect for which the manufacturer is responsible may be considered to exist.; The NHTSA does not expect manufacturers to be omniscient when it come to the use of the vehicles they produce. It does, however, expect the stated weight ratings to reflect the design of the vehicles and the uses to which they can reasonably be anticipated to be put. Where the manufacturer has reason to know the specific commodity intended to be carried in its vehicles and those vehicles have a totally enclosed cargo area, as with a tanker, the rated cargo load is relatively easy to determine.; In your particular case, your responsibility for any subsequen overloading of the vehicles it manufactures would be determined by the reasonableness of your GVWR's and gross axle weight ratings (GAWR), given the size and configuration of your vehicles and the types of loads which they could reasonably be expected to carry. Since some of your vehicles are flat beds (no enclosed cargo area) you would obviously not be able to provide weight ratings sufficiently high to prevent overloading in all instances. The design of flat beds necessarily permits overloading since the cargo area is unrestricted. Thus if the weight ratings you specify appear to have been arrived at by a good faith determination based upon the types of loads you anticipate will be carried, your responsibility with regard to weight rating specifications will have been satisfied and no safety-related defect will be attributable to you.; Sincerely, Joseph J. Levin, Jr., Chief Counsel