We're working on the design of a new build in Austin, TX, and we're trying to decide what type of coping we want. We're going for a more modern look, so we're toying with the idea of cantilevered concrete right up to the edge. I have a few questions:
1. Do we need to use any specific type of concrete?
2. Do we need an expansion joint with cantilevered concrete? I've looked at tons of pictures and watched a few videos, and I often don't see expansion joints. Some pictures below.
3. If we don't put in an expansion joint, how do we keep the deck from cracking?
These are the pictures I'm looking at (some are cantilevered stone).