A method for positioning a data center rack relative to a rack-supporting frame, the rack-supporting frame comprising left and right vertical support units laterally spaced apart from one another, the method comprising: affixing at least one left guiding member to the left vertical support unit such that: part of one of the at least one left guiding member extends frontwardly from a front end surface of the left vertical support unit; and part of one of the at least one left guiding member extends rearwardly from a rear end surface of the left vertical support unit; affixing at least one right guiding member to the right vertical support unit such that: part of one of the at least one right guiding member extends frontwardly from a front end surface of the right vertical support unit; and part of one of the at least one right guiding member extends rearwardly from a rear end surface of the right vertical support unit; affixing at least one front rack-locating member to a front side of the data center rack; lifting the data center rack; inserting the data center rack between the left and right vertical support units until the at least one front rack-locating member abuts one of (i) the front end surfaces of the left and right vertical support units, and (ii) the at least one left guiding member and the at least one right guiding member; affixing at least one rear rack-locating member to a rear side of the data center rack; and lowering the data center rack so that: the at least one front rack-locating member is supported by the rack-supporting frame and aligned relative thereto via at least one left guiding member and the at least one right guiding member; and the at least one rear rack-locating member is supported by the rack-supporting frame and aligned relative thereto via at least one left guiding member and the at least one right guiding member. affixing at least one left guiding member to the left vertical support unit such that: part of one of the at least one left guiding member extends frontwardly from a front end surface of the left vertical support unit; and part of one of the at least one left guiding member extends rearwardly from a rear end surface of the left vertical support unit; part of one of the at least one left guiding member extends frontwardly from a front end surface of the left vertical support unit; and part of one of the at least one left guiding member extends rearwardly from a rear end surface of the left vertical support unit; affixing at least one right guiding member to the right vertical support unit such that: part of one of the at least one right guiding member extends frontwardly from a front end surface of the right vertical support unit; and part of one of the at least one right guiding member extends rearwardly from a rear end surface of the right vertical support unit; part of one of the at least one right guiding member extends frontwardly from a front end surface of the right vertical support unit; and part of one of the at least one right guiding member extends rearwardly from a rear end surface of the right vertical support unit; affixing at least one front rack-locating member to a front side of the data center rack; lifting the data center rack; inserting the data center rack between the left and right vertical support units until the at least one front rack-locating member abuts one of (i) the front end surfaces of the left and right vertical support units, and (ii) the at least one left guiding member and the at least one right guiding member; affixing at least one rear rack-locating member to a rear side of the data center rack; and lowering the data center rack so that: the at least one front rack-locating member is supported by the rack-supporting frame and aligned relative thereto via at least one left the at least one front rack-locating member is supported by the rack-supporting frame and aligned relative thereto via at least one left guiding member and the at least one right guiding member; and the at least one rear rack-locating member is supported by the rack-supporting frame and aligned relative thereto via at least one left guiding member and the at least one right guiding member.