Excellent system to use for transportation of foodstuffs and/or peris hable goods (HACCP), due to the track profile which can e fficiently and easily be cleaned (hygienic). The aluminium captive decking beams are adjustable in height per 25,4 mm. Suitable for use with flat aireline tracks. The decking beams are easily locked into position at the desired height thus providing an instant second and even a third level of decking or pallet stations. The system can also be set at various levels throughout the vehicle to accommodate mixed load requirements. When the beams are not required, they simply store at roof level. The stated performance/load capacity can only be achie ved when the side- wall material capability equals or exceeds the tracks.