Those are L. suphureus, aka: sulfur shelf, chicken of the woods, or chicken mushroom. These are distinct from the mushroom called hen of the woods, but also edible (and damnit, I think I saw some hen of the woods today and didn't realize what it was.)
Generally only the growing edge is tender enough to eat unless they are very young, which those are not. "wet" cooking methods are recommended. You can also make mushroom stock with the tougher portions- make sure to wring out the cooked mushrooms after making stock or you'll lose maybe 20% of the liquid.