The need for crosswalks has risen in recent years, as the number of highways which are renewed every day and the number of vehicles entering into service has also increased and particularly intercity highways were left in the middle of central places. While crossing the street, hundreds of people lose their lives each year particularly in metropolitans. The best alternative aimed at solving this problem is to increase the number of crosswalks. The crossroads can be generally divided into two categories, namely, underpasses and overpasses. The observations which have been carried out reveal that pedestrian overpasses are healthier, cleaner, more problem-free and safer than underpasses. Considering the general situation in our country, it can be seen that the steel and concrete are on the foreground in the construction of pedestrian overpasses. The steel construction building enjoys more advantages than concrete buildings. Some of these advantages are as follows: