Powerlift and powered roll swing would always be mounted from overhead crane system either free standing or suspended from existing steelwork

Typical application rotation of large rolls

Crane parameters
spans up to 8m
swl up to 1000kg (dependant upon core id)
powered travel, electric or pneumatic
electric raise and lower dual speed
option of fixed height controls

Roll swing parameters
152mm probe swl 1000kg
76mm probe swl 600kg
electric or pneumatic rotation

Take rolls from horizontal to vertical or visa versa 
(note; not to be used with rolls that will telescope)