Engineering Professional Practice

An Engineer designed a RCC Bridge on behalf of consultant. A class contractor constructed the bridge. After the completion of the construction, traffic was allowed. Six month of after operation, cracks developed in the bridge. A probe team was established by road department and you are a member of that team. During investigation it was found that the design procedure was okay, but the quality of steel material used was not duly tested. The contractor argued that the procedure of construction was in accordance with the instruction of engineer and specification, however, the workmanship was found not as per specification. There was also lack of proper supervision by the consultant. The design load for the bridge was 20 tons. It was also reported that there happen to pass more than 20 tons vehicles also. The consultant was good friend of contractor. Being a member of probe team, what is your judgment on the failure of this bridge? Explain.