Sliding Frames 
    Durable Sliding Frame for Harsh Operations
    The Putzmeister sliding frame system has been designed especially to
  meet the requirements of harsh three-shift operation. Thanks to modern
  Finite Element Analysis and proven Putzmeister hydraulic components
  the sliding frame’s design, as well as its service life is optimized.
  One major feature is the space-saving design emplacement of the
  sliding frame’s piston rod which is located on the silo floor.