Steel Girder Bridge (IMAGE) Colorado State University Caption A steel girder bridge representative of the close to 80,000 Hussam Mahmoud's team studied in their analysis of how climate change is impacting bridge infrastructure. Credit Hussam Mahmoud/Colorado State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.