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I am working on a project where there are external "high" temperatures on a foundation due to equipment operation and I have the following questions: When designing foundation rebar for external temperatures due to external environment (in my case 70 degrees C), is it common for the thermal temperature to govern the rebar design (causing additional reinforcement rebar))?
Since the external heat is above the foundation, would this only affect the top rebar? If so, to what depth?
What would be the effect on the foundation if no extra rebars are added and what would be best mitigation method in case the foundation is affected?
Hello,The mat foundation is 5 feet thick with a localize heat source (insulated 6 inch pipes with heat of about 140 F/60C) not placed directly on the foundation. The pipe is about 3 inches from the top of the foundations, local ambient temperature is about 70F/20C.
Would the temperature gradient be enough to affect the rebar or concrete design of this foundation?
Is there any ACI code/section that would be specific for this?