I did this at TechShop Menlo Park. http://www.techshop.com
Proper set up inside a kiln will allow you to work on multiple projects and treating your set up with proper care will make it last. This is how:
Step 1: Materials
Purchase a variety of sizes of Kiln posts, one Cordierite shelf for the base, multiple Silicone Carbide full size and half size shelves and a bag of powder Kiln wash. Before purchasing make sure you know the measurements of your kiln. We have a 10 sided kiln so we got 10 sided shelves. Kilns vary.
Step 2: Kiln Wash
Only use Kiln wash on the Cordierite shelf which will serve as your kiln bottom catching accidental spilled glazes and such. Mix Kiln wash with water and make a smooth milky mixture. Shoot for a thin consistency of heavy whipping cream. Apply many layers with a brush, brushing in all directions and drying between layers.
Step 3: Install the Kiln Bottom
Using a few of the shortest of your posts at the bottom of kiln for prop-up, place your multi-coated and fully dried bootom shelf at the bottom of the kiln.
Step 4: Shelving
Always use at least 3 same length posts to prop up your shelves weather they are full or half size. Stack your shelving to fit the spatial needs of your projects.
Step 5: Load Artwork
You are ready to arrange artwork on your shelves and bake. Make sure all your pieces have the same baking temperatures.