Nice, love the 'sandwich'. Looks like horse panel with the 4" mesh, heavy but won't buckle under chicks weight on top for sureOkay! Here is my set up so far, I still need to put something on top to protect the pad from poops. This is 2 king sized sunbeam pads sandwiched between metal paneling called high five. Found at our local feed store. I can raise and lower the pad as needed with the chain. Suggestions are welcome! Chicks come Sunday. About 20, half 1week old and the other half 1-2 days old.
Might want to put a block of wood under both ends to give more access, especially after they start to grow.
You can play that by eye, but a couple 2x4's or bricks should do the trick and can stack in a couple more as they grow.