Hanger design

In my travels around Europe I have seen several examples of hanging
gliders from the hanger roof - Is it possible to have an arrangement
where you could actually extract the glider that is hanging without
disturbing the glider(s) on the floor of the hanger? IE an I beam on
the ceiling which the hoist could travel along similar to what
warehouses in olden days had..
In addition would appreciate feedback on where the electric hoist
equipment can be sourced and anyones experience with these systems or
any other hanger designs that could be recomended for private owners.
Pictures would be appreciated.
rgds
Stephen