Diaphragms between the boxes will also be box-shaped, exposing smooth surfaces along the entire length of the bridge. The unique design of the V-piers allows for long pier spacings of up to 400 feet, creating the desired open and light appearance while reducing the number of expansion joints and associated maintenance requirements. However, because each V-pier provides dual support points for the girders, the girder spans are reduced and can be erected quickly and economically. The estimate of total steel to be used in the box girders is approximately 85,000 tons. David Jeanes, AISI's senior vice president of market development, said that the benefits of steel in constructing this bridge go beyond its strength and durability.
Steel is the most recycled material on earth.
It's friendly to the environment, making it a natural material to use in the Potomac River crossing. For past issues of AISI newsletters, please visit our archives.