Mahan’s wide body aircraft hangar is located at Emam Khomeini Airport in Tehran. In this project for lifting the roof of hangar stretch method was used and the stretching of the tendons, the 2,000-tonne steel roof arch hangar and remove the slide from one side to the extent of 23.5 meters in height. PayabZamzam Company as an expert contractor had duty about providing all of post-tensioning materials and constructed cables. Used materials were included 70 ton coated strands and 30 pair of 28 type anchorages.