storage structures are disclosed in which lifts carry articles to be stored , such as motor vehicles to be parked , from entry level to storage levels . each lift comprises sets of endless elements such as chains which carry platforms . each platform is permanently attached to one set of endless elements . each platform is releasably attached to the other set of endless elements whilst that platform is in the operative run of the lift and is horizontal . when the platform is in the inoperative run of the lift it is vertical . rotatable rings or reciprocating shuttles , with bays for temporarily accommodating articles , move the articles between the lifts and storage bays provided at each storage level .