Cantilever Coping. Depends on the look you want. Building a diy pool kit can be a great way to save money and that money could be spent upgrading things like doing a deck made of pavers or poured concrete.
When the cement finally sets the form is removed and the pool edge hangs just slightly over the shell. 2x6 joists should only be used on ground-level decks that do not require and will not. Cantilevered coping is a poured-in-place bull nose concrete edge that extends around the perimeter of the pool.
In my area SE Texas cantilevered concrete coping in regular redi-mix is the same price as 9 brick or flagstone coping.
When the cement finally sets the form is removed and the pool edge hangs just slightly over the shell. Not a coping you can climb out of the pool on. Cantilever-edge coping is a process that involves poured concrete into molds at the edge of the pool. Cantilevered coping is a poured-in-place bull nose concrete edge that extends around the perimeter of the pool.