Friday, July 2, 2010

Cable-Stayed Bridges - North Arm Bridge (4)

A view from under the soffit of North Arm Bridge. Each tower supports twelve cables. The cables are made up of 58 sheathed, galvanized, and waxed strands in a 9 inch HDPE pipe. The cables were installed strand by strand. Dampers were provided at the deck anchorages to reduce wind vibration and the pipes have double-helix ribs to reduce rain vibration.  A cost-benefit analysis was performed to determine if traditional tower anchors or continuous cables in saddles (like on the Maumee River Bridge) could be used, but the tradition anchorage was found to be less expensive.
Creative Commons License
Cable-Stayed Bridges - North Arm Bridge (4) by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

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