In this study, the evaluation of the possibility of using this type of roof in multi-story buildings in terms of quality, cost, and time was considered. In this regard, various types of roof systems, both traditional and modern, including beam and block roofs -chromite-concrete slabs- uboot and cobox, etc., were initially evaluated and prioritized using the AHP method and AHP SOLVER software based on various technical, economic, and executive criteria. Subsequently, roof systems were evaluated for 2, 5, 10, and 12-story buildings. The results of the analysis showed that overall, the Kubiax and Ubot roofs are ranked first and second as two new roofs. Given that the weights obtained for these two ceilings are equal to each other, it is possible to unanimously consider these two ceilings to be ranked first. The beam and block roof with a weight of 0.174 was in second place. The composite roof with a weight of 0.141 was the third option, and finally the concrete slab option with a weight of 0.135 was the fourth option. The chromite roof with a weight of 0.122 was in last place. Also, as it was determined, for the beam and block roof, after optimizing the 2, 5, 10, and 12-story structures, the weight of the 5, 10, and 12-story structures increased by 3.24, 7.87, and 9.42 times, respectively, compared to the 2-story structure .For the concrete slab roof, after optimizing the 2, 5, 10, and 12-story structures, the weight of the 5, 10, and 12-story structures increased by 3.36, 8.23, and 9.85 times, respectively, compared to the 2-story structure. The weight of the structure was reduced by a maximum of about 30% when the roof was a U-shaped roof compared to a concrete slab roof. For 2- and 5-story structures, the structural weight reduction ratio (Roof weight and its optimization and, as a result, the impact on the structural weight) was 20 percent, for 10-story structures this ratio was 25 percent, and for 12-story structures this ratio was 30 percent.