Iran is a country with high seismicity while Tehran, the capital city is home to more than 10 million people which are located on the highest seismic zone of the country. There exist 153 gas stations throughout the metropolitan which are constructed to old building codes with little or no attention to the seismic considerations. This study was conducted under a financial support by the ministry of Oil. First as built drawings were collected and studied in details. A set of new drawings were then created by detailed inspection and also some destructive tastings. This study then looked at the both mechanical and structural properties of the whole structures and their seismic behavior. This procedure was conducted for the main building, piping, tanks, shed structures as well as pumps and mechanical equipments. The loading was considered by the seismic provisions of the Iranian seismic provisions and static load analysis was carried out for the structures. This paper shows the general approach and also the detail procedure used for one such stations.
