The Longest suspension bridge in the world: Su tong

The Sutong bridge over the Yang tze kiang (also known as Yangtze) has so many superlatives, here only some key data that is called because of its space is considered to be the longest cable in the world. Provides a passage of 62 m and is flanked by giant pylons. Together with the up and down during the more than 140 pillars of support and feed armors created to bridge the 8206 m Yang tze kiang here, depending on the season in some places up to 14 km wide may swell. And in order to anticipate it: the demand for concrete pumps concrete built here until its limit!

Before delivery of the high pressure pump concrete BSA 14000 HP-D Putzmeister had promised that the machine at 310 m by a pump head of 125 mm from other 30 m³ / h promotes. BSA were specific for pressures up to 260 bar. As in the 150 meters in the concrete pumping a disproportionate increase in hydraulic pressure was observed, switched parties in the Putzmeister AG, customer service and technical management in the project. After a slight change in the formulation of concrete, reinforcement of some very aggressive pumping of concrete and the use of components of carbide wear parts of the younger generation was able to promote high concrete continue.
The total cost of the Sutong bridge project is estimated at about 6.45 million yuan (about 726 million U.S. dollars), respectively. Work began in June 2003, completion is scheduled for 2009.