I am interested in the need for reinforcing steel placement in house foundations that are constructed on good engineered fill material properly compacted to 98% of proctor density and certified as capable of supporting 150Kpa. What level of precaution is necessary to avoid future foundation settlements or wall cracking? Some advice is to place 2-15 or20m bars in the footing (450mm X 150mm) only and some to place additional bars in the top of foundation wall. This assumes the engineered fill was placed properly and protected from frost and moisture penetration or softening during foundation excavation.
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