Bridges with a vertically lifting system — both domestic and foreign, generally are not much different from each other: the same in structures, drives and other equipment. In the practice of the institute, the greatest spans for these systems for wiring with skiing routes on vertical towers were 88 m on the bridge over the North Dvina River in Arkhangelsk, built in 1964. under the combined movement. The largest span of a similar system was carried out in America in the 60s. Through the Delover River on the railway between Philadelphia and Atlantic City. The total size of the divorce span amounted to 532 feet, or 165.2 m with a percentage dimensions (from the height of the water level) in 40 m. The lifting flight is driven by two electric motors with a power of 220 liters. C placed one at each tower. The rise is carried out in 5 minutes. However, the system of vertical lifting of the divorce span in the period 1960-1990. was very developed and introduced into practice without external vertical towers.
The first bridge with a divorce span of this type was built on the street. St. Paul in the city of Milvuoki in November 1966. The towers of the vertically lifting system were replaced by steel supports that were located inside the hollow bridge supports. The flight was raised by a hydraulic drive. In the closed position, the lifting span worked like a beam on two supports. Currently (as mentioned above), in the complex of protective structures from floods in St. Petersburg, the construction of the bridge of a vertically lifting system of a reckless type with a flight of 120 m is completed. Free
