This International Standard specifies the requirements for dimensional compatibility of forage harvesting machines and transport vehicles necessary to ensure satisfactory Operation. NOTE - This International Standard makes no Claim to cover simple types of flail forage harvesters that normally work in conjunction with agricultural trailers fitted with extension sides. Simple flail forage harvesters are defined as : a) mounted or semi-mounted units; b) units without double chop capability c) units without secondary blowers or other conveying/blowing devices; d) units requiring tractors of power less than or equal to 50 kW.