ABSTRACT
The failure is happened under main circumstances, but in general in case of occurring in a time period of the structure life there is a maximum load and minimum strength happened then the failure will occur. The most common cause of failure found in the investigated cases is poor design or lack of strength design is the lowest probability as 15% of the structural failures are caused by design errors, 60% by construction error, and the remaining 25% by lack of maintenance or bad operations. The design is lower percentage of causing the structure failure as the design engineers are not working under pressure and have a time to do many review cycles so the error will be based on the project manager and the technical team. There are many other sources that can cause determination on the reinforced concrete structures.
