IHI Infrastructure Systems Co. and Sumitomo Mitsui Construction Co. said they have started girder construction work for a bridge in Hanoi.
The move came after Sumitomo Mitsui completed the construction of concrete support towers for the Nhat Tan Bridge over the Red River in the Vietnamese capital.
IHI Infrastructure, a unit of IHI Corp., will lay a 1,500-meter bridge girder and steel suspension cables.
The Japanese firms are aiming to finish the span, which will also be known as the Vietnam-Japan Friendship Bridge, in December 2014.
The ¥80 billion bridge project is funded by Japanese official development assistance. The bridge was initially scheduled to be completed in 2010.
Land acquisition delays caused Tokyu Construction Co., another partner in the project, to seek additional costs.