Interpretation ID: aiam2079
Truck Body and Equipment Association
5530 Wisconsin Avenue
Suite 1210
Washington
DC 20015;
Dear Mr. Crampton: This responds to your September 8, 1975, question whether trucks tha carry specialized equipment (such as emergency medical equipment, fire fighting apparatus, or mobile power generator equipment), would qualify for exclusion from Standard No. 121, *Air Brake Systems*, if they are geared down or governed so that their speeds attainable in two miles are not more than 45 mph. You state that each vehicle's empty weight is more than 95 percent of its gross vehicle weight rating (GVWR).; The section of Standard No. 121 that lists the vehicles to which th standard applies reads as follows:; >>>S3. *Applicability*. . . . In addition, the standard does not appl to any trailer whose unloaded vehicle weight is not less than 95 percent of its GVWR, or any vehicle that meets any one of criteria (a) through (d) as follows:; . . .(d)(1) A speed attainable in two miles of not more than 45 mph and; (2) An unloaded vehicle weight that is not less than 95 percent of th vehicle GVWR, and; (3) No passenger-carrying capacity. <<