How to Build Floating Decks: Tutorial for Novices - The Spruce.14 Sep 2017 . All you need is a simple guide that will help you plan your project. Such deck plans are very doable for the do-it-yourselfer. With pencil, paper and ruler ready, just draw lines to represent, two-dimensionally, where the frame and deck joists will be going. There is no need to include the decking boards in your.