Usually consist of upright frame, top beam, bracing, arm, pallet support rail etc. Pallet support rail is a punched and roll formed, so it has the character of long inertial distance/strong load capacity /beautiful appearance. Combines the speed of throughput and access to individual pallets of Adjustable Pallet Racking but with increased use of the cubic space available. Used in conjunction with special purpose pallet handling equipment which may require guidance, by electronic wire or by steel rail. Very tall installations will require a 'super-flat' floor.