[header] How to make a shower pan [title] Ensure your floor can support the weight of a shower before beginning construction because the concrete can be quite heavy. [substeps] It may be a good idea to reinforce the floor below the shower pan with exterior grade plywood. [title] Prepare your shower drain prior to pouring the concrete or hire a professional plumber to install the drain you plan to use. 
[substeps] You will need a two-piece drain. One piece of the drain will sit flush with the floor and connect to drainage pipes beneath the surface.