I thought that if the 1m foundation (Concrete) would build the foundation based on concrete materials only, so iron plate is not needed. When I tried to dismantle and copy with middle mouse button, it show that the foundation is Ficsit foundation, not concrete foundation. Also, is there a plan to add an update for 2m and 4m floor variations? Thank you.
Sorry for the mention/ping @Andre Aquila <Aquila Industrial>