How to Build a Pool Deck : 5 Steps - Instructables
Lay a 4-ft. level across the top cap of the pool—the coping—and mark a level line across the 4 x 4s (Photo 3). Next, remove the posts and measure down from each line a distance equal to the thickness of the pool coping, plus 11⁄2 in. for the 2 x 6 decking, 51⁄2 in. for the 2 x 6 floor frame and 1⁄2 in. for expansion.