Preformed shower bases are supported so they do not distort or crack and are recessed into the wall so that the water-resistant surface materials pass down within the rebate around the edge and lap over the base upstands; preformed trays, baths and receptacles are supported at the base. Notes refer to manufacturer instructions and AS 3500 for waste connections.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.