Drive-in shelves were also called passage racks, which were not divided by passages but unitary. Used in conjunction with special purpose pallet handling equipment which may require guidance, by electronic wire or by steel rail.
Pallet support rail is punched and roll formed, so it has the character of long inertial distance/strong load capacity.Be used in food industry, chemical industry, clothes industry and freeze warehouse and so on. 
Picking direction has single and double rows. Single one (near wall) depth is not exceed 6 pallet depth. Double one(middle area can pick goods) depth is better control in 12 pallet depth. This kind system usually not exceed 10 meter high. To fasten it ,not only need the strong structure, but also need to add fix equipment. Goods is better not too big and too weight, usually less than1500kg. the width is not exceed 1.5 meter. And can work in trucks.

       Because drive-in shelf request more high denseness and steady when to store the goods, the spare parts need more compare with others. According to the connect with the spare parts and frame, the goods can be store on the special purpose pallet handling equipment safe and denseness. Thus can maximum use of space. Spare parts include: main frame(Special purpose pallet handling equipment, which be connected  by frame and main beam, can be single or double face), main beam( support the panel), Top beam( parts make frame steady),Top brace(parts make frame steady) , side brace(parts make frame steady, use in single layout fame),foot-guard ( post protector), Barrier(guide rail barrier) and so on. Above are the conmen spare parts pictures of drive-in shelf.