The proven pull/push technology of the operating gantry crane guarantees fastest access times. Optimum sequences can be designed for each customer by using different speed options. Various station designs exist, for example longitudinally or laterally arranged telescope stations or carts. KASTO always uses robust and highly reliable chain hoists with virtually maintenance-free precision roller chains. The additional costs for this technical solution compared to systems with steel ropes are justified by a maximum system availability and significantly lower maintenance and service costs. Moreover, the compact sheet metal storage system UNITOWER uses power more efficiently since only the desired cassette needs to be moved and not - compared with vertical carousels systems - all of them.