This International Standard specifies the functional requirements for a self-propelled loader capable of raising air cargo unit load devices (ULDs) with base dimensions and maximum mass as follows: This International Standard does not intend to provide all the design requirements applicable for aircraft lower deck loaders. Other requirements can be found in separate International Standards: — ISO 4116 specifies the additional requirements applicable for conveying surfaces of those pieces of aircraft ground support equipment intended for handling and loading of baggage and cargo unit load devices; — ISO 6966-1 and ISO 6966-2 specify, respectively, the general and safety-related requirements applicable to all aircraft ground support equipment. The requirements of this International Standard were determined based on generally recognized assumptions with regard to a) the normally intended use of aircraft ground support equipment, when used on the ramp of international civil airports in order to handle, service or maintain civil transport aircraft; b) the environmental (surface, slope, weather, lighting, operating rules, staff qualification, etc.) conditions prevailing on the ramp area of the majority of international civil airports. It is assumed the manufacturers of aircraft lower deck loaders define in the relevant documentation the specifically intended conditions of use and environment for each item of equipment, and the purchasers systematically review their own specific conditions of use and environment in order to determine whether those stated are adequate, or negotiate with the manufacturer appropriate modifications to ensure they are.