Hello. We are converting a former metal portable building used for a school classroom in to a living space. We have got all the site plans, remodel plans, electrical and foundation ECT. We are trying to do as much work as we can ourselves. We are used to doing remodel work ECT....but this is a first for cement like this. Question is...what is the best way to suspend the rebar cages so they will pass inspection. Can we use bricks? We are at an incline so all 4 cages vary in size from 4 feet up to 8 feet. They piers will be 36 inches around. Thank you.