"Nhat Tan" Bridge, in Hanoi, Vietnam
The road between Hanoi and the Noi Bai International Airport saves the 1,200-metre-wide Red River thanks to the "Nhat Tan" cable-stayed bridge. Five Comansa tower cranes model 21LC550 worked in the construction of this bridge and its pylons.
The cranes, which reached a height of up to 107.8 metres, worked in lifting all the necessary materials for the construction of the pylons (formwork, prefabricated rebar cages, concrete, etc.) and also helped to unroll and place the cables of the bridge, as well as to raise the cable anchor boxes to the top of the pylons.
- The initial assembly of the five cranes, as well as some jacking-up operations, was carried out by Comansa´s technical team, who exceptionally moved to Hanoi to attend these complicated operations.
- Comansa´s modular system was fundamental in such erection, especially in three cranes, which were located in pylons completely surrounded by the water of the Red River. The lifting of the sections had to be done by crawler cranes located in barges in the river, which made the manoeuvers more difficult the days in which waters flow down at high speed.
- As all of the cranes had the same D33 mast section, which is 2.5-metre wide, only two hydraulic jacking cages were necessary to perform all the climbings, which meant a significant economic saving.
- To achieve the maximum productivity, the cranes were equipped with an optional hoist mechanisms, which allowed speeds of up to 220 meters per minute.
- The easy manoeuvrability of the cranes and its great precision to locate the loads in place, facilitated a fast and agile construction.
- During the project execution, the tower cranes were equipped with Obstruction Lights for air navigation and lightning protections to provide safe circumstances for the work force.
Customer: Vietnam’s Ministry of Transportation
General Contractor: IHI Infrastructure Systems and Sumitomo Mitsui Construction in a Joint Venture
Key partner: Company Asia-Ted Pte Ltd., who supplied the cranes