I am installing a 16'x36' steel wall inground pool kit from PW. The walls include holes in the bottom flange to hammer rebar through. They recommend one piece of rebar per panel. I need to pour a ~8" thick concrete collar around the base of the outside pool walls. I know the concrete must be bonded. To do so, I plan to bond to the rebar that will be embedded in the concrete once poured. My question is how many of the ~20 pieces of rebar should I bond? All? In Googling, I see a lot of references to four corners/points, but that seems to be for installations that use a rebar grid.