Hi,
I have a square spread footing, 7 ft x 7 ft x 2ft. This is gravity footing. I am calculating minimum reinforcement based on temperature and shrinkage 0.0018*7*12in*2*12in=3.63 in^2, each way. However, RAM Foundation Give me Required reinforcement 5.68in^2 based on Sec 24.4.3.2. How does RAM calculated this number? Also, does percent of overhang to assume rigid reference length or area?
Thanks,
Abdisa