Once the pool beam has been leveled and coping has been installed your project will be ready for decking. It is very important that an expansion joint be installed either behind the pool coping or between waterline tile and cantilever deck. Please Note; if you have hired your own decking contractor do not allow any nails to be attached to your pool shell and be sure your project is getting expansion joint installed. This will help prevent future problems such as cracking of your new coping loose stones, waterline tile and or pool surface cracks. decks will be formed a gravel base will be layed, steel is installed and bonded. Once the pre-deck inspection has passed and plumbing lines are holding pressure, The project is ready for concrete to be poured.