I'm not sure there is a page with that info on, as this website is for guinea pigs. If you go on 'how to make' page, it shows you how to make a guinea pig cage, as long as you make it big and with an upper level.. it's just the same, that page will guide you through it.
Well everyone is always talking about how easy it is to make a multi-level rabbit cage, but the cavy directions don't really help me a lot. Doesn't tell me how to ad another level to it. Not sure how to attach the coroplast to the grids. Do I put a layer or grids on top of the first floor to support the coroplast above it?