Proccess of Building a Bridge

The building of a bridge is planned well to make sure that the bridge will be finished as soon as possible. Here is the process of building the Matadi Bridge in Zaire. It has a span of 1706 feet (520 meters), making it the longest suspension bridge in Africa. Materials for the bridge had to be brought 10,000 miles from Japan.

1971-1976 - The company named Ishikawajima-Harima Heavy Industries lays out the plans for building a bridge at Matadi. They have to find out how the bridge will be financed. A design is tested in a wind tunnel and is approved. Materials are also tested and selected.

November 1978 - The Republic of Zaire hires the Japaneese group of companies of IHI Ltd., Mitsubishi, and Kawasaki to build the bridge.

February 1979 - The construction base, homes of the workers and amenities start to be constructed.

November 1979 - The places where the anchorages and piers are prepared.

December 1979 - The construction of the anchorages and towers begins in Japan.

June 1980 - The place where the piers will be constructed is prepared.

July 1980 - The first shipment arrives with cable anchor frames and tower anchor frames.

September 1980 - The construction of the cables begins in Japan.

October 1980 - Concrete work for the tower base is completed. The second shipment arrives with tower panels and reinforcement for anchorages.

November 1980 - Preperation for the anchorages is done. Construction of the deck girder begins in Japan.

February 1981 - The first stage of installing the cable anchors is completed.

March 1981 - The cable anchor frames are installed. The second stage of installing the actual frames is started.

April 1981 - In Japan, the towers are completed.

July 1981 - The third shipment comes, and it contained the tower top saddles and splay saddles, and the cable. The rope used for air-spinning is taken across the river.

August 1981 - The construction of catwalks for installing the cables start.

September 1981 - The catwalks are completed.

October 1981 - The cable strands start to be pulled out. (There are 54 strands per cable, each with 127 wires.)

November 1981 - The concrete work for the anchorages is completed, except for the final slab-work, or "gluing". The fourth shipment arrives. It has all of the side girders.

January 1982 - The cable strands are completed and anchored.

March 1982 - The fifth shipment arrives with half of the girders for the main roadway.

May 1982 - The cable bands, hanger ropes, and deck girders are completed in Japan.

June 1982 - The girders start to be erected (from the towers to the center), and the painting starts.

July 1982 - The sixth shipment arrives with the rest of the girders for the road deck.

September 1982 - The girders are done being erected.

November 1982 - The cables are completely wrapped.

December 1982 - Dismantling of the temporary supports and cranes begins, and the access roads are completed.

February 1983 - The deck is fully asphalted.

March 1983 - The hand railings and lighting work is completed. The roadway is fully tested.

April 1983 - The cable bands are fully tightened. All of the other equipment and facilites are removed. The site is cleared, and the equipment returns to Japan.

May 1983 - The bridge has an opening ceremony.


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