Clay studio shelves are rather unique. They need to accomidate pottery of varying heights and widths. Shelf units should not have fixed heights. The trick is to build a frame without shelves. The frame should have slots for wareboards to slide into. Check out the "HOW TO" tutorial below: For more information: TUTORIALS SHELVES TUTORIAL
In terms of the lyophilization process, they are a form of heat exchanger, within the chamber, that have a serpentine liquid flow through them, entering one side and flowing to the other side. They are located in the circulation system.