Climate Changes and their Impact on Urban Development

Bridge projects come at the top of the vital national projects to which countries pay special attention and which require precise designs and correct implementation.The research paper presents one of the design methodologies for bridge superstructure as it achieves design safety and economic requirements and the associated duration and quality of implementation.Adopting the idea that the design of prestressed and pre-cast concrete systems in particular...It leads to distinguished results in this regard, and some sketches and calculations of actual cases that have been applied have been included.