Cable-stayed bridge with semi-fan system
for registered users
|Function / usage:||
Motorway bridge / freeway bridge
Steel-reinforced concrete composite bridge
Prestressed concrete bridge
Annacis, British Columbia, Canada
|Coordinates:||49° 9' 35" N 122° 56' 34" W|
|main span||465.00 m|
|length of side spans||2 x 50.00 m - 2 x 182.75 m|
|deck||deck width||32.00 m|
Excerpt from Wikipedia
The Alex Fraser Bridge (also known as the Annacis Bridge) is a cable-stayed bridge over the Fraser River that connects Richmond and New Westminster with North Delta in Greater Vancouver, British Columbia. The bridge is named for Alex Fraser (1916 – 1989), a former British Columbia Minister of Transportation.
The bridge was the longest cable-stayed bridge in the world when it opened on September 22, 1986, and was the longest in North America until the Arthur Ravenel Jr. Bridge opened in 2005. As of 2009 it is the 32nd-longest cable-stayed bridge in the world, and second-longest in North America. It is 2,525 m (8,284 ft) long with a main span of 465 m (1,526 ft). The towers are 154 m (505 ft) tall. It consists of six lanes, three in each direction, and has a maximum speed limit of 90 km per hour. Upon opening in 1986, only four of the six available lanes were open. Cyclists and pedestrians share two narrow sidewalks one on each side. All six lanes opened in 1987 after traffic demand justified the need.
The bridge's southern end is in North Delta and its northern end is on Delta's Annacis Island. Connections on its southern end lead to Blaine, Washington and to White Rock. The connections on the northern end lead into the cities of New Westminster, Richmond, and Burnaby, and on into Vancouver itself. It is a major artery in the Lower Mainland of British Columbia.
The bridge was constructed for the British Columbia Ministry of Transportation and was designed by a joint venture of Klohn Crippen Berger and Buckland & Taylor (Now COWI North America). Its total cost was $58 million.
According to an announcement on January 19, 2017, a new lane will be added on the bridge by slightly narrowing the existing lanes and removing the shoulders. A counterflow system with a movable barrier will be added to help ease traffic during morning and afternoon rush hours. This will be a joint venture by the provincial and federal governments. Construction is slated to be completed as of spring 2018.
In December 2016 the Alex Fraser Bridge along with the Port Mann Bridge dropped "ice bombs," also called "slush bombs" on vehicles causing damage to windshields. The Alex Fraser has the cables along the sides of the driving lanes whereas the Port Mann has them cross over-top of the driving lanes. In addition to 2016, this also happened on the Alex Fraser in 2005, 2008, and 2012. The Alex Fraser needed to be closed a few times during December 2016 due to the possibility of ice bombs; this caused major traffic problems in the region. To combat this issue, the BC Government announced that a heavy lift helicopter will be used to blow snow and ice off the cables to prevent it from accumulating and falling onto the cars below.
Relevant Web Sites
- Annacis Bridge - eine Schrägseilbrücke in Verbundbauweise. In: Stahlbau, v. 56, n. 2 (February 1987), pp. 57. (1987):
- Annacis cable-stayed bridge—design for earthquake. In: Canadian Journal of Civil Engineering / Revue canadienne de génie civil, v. 12, n. 3 (September 1985), pp. 472-482. (1985):
- Annacis Island Bridge. Presented at: 12th IABSE Congress, Vancouver, BC, Canada, 3-7 September, 1984. (1984):
- Bridges. Macmillan Publishing Company, New York (USA), pp. 131. (1993):
- Bridges - Ponts - Brücken. Atrium, Mexico City (Mexico), pp. 168-175. (2002):
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