Self-Anchored Suspension Bridge
San Francisco-Oakland, California
Client:
American Bridge/Fluor
375 Burma Road
Oakland, CA 94607
Ron Crockett
Tel: 510-808-4592
Email: rcrockett@abfjv.com
Date:
Construction completion scheduled 2012
Scope of work:
Construction Engineering
Construction cost (estimated):
US $1.4 billion
Services Performed:
- 3-D integrated drawings
- Independent design of temporary towers
- Construction engineering support
Issues:
- Design for high seismic zone
- Complex construction staging
The San Francisco-Oakland Bay Bridge East Span Seismic Safety Project is a replacement bridge for the existing east bay spans. The Self-Anchored Suspension Bridge (SAS) Superstructure and Tower package is for construction of the signature span of the new bridge. This 625-meter portion of the new bridge includes parallel orthotropic box girders and a single steel tower to support the main cables. The bridge will be constructed using temporary towers and barge-mounted cranes.
OPAC was engaged by the contractor (American Bridge/ Fluor) to provide the following engineering services during erection:
- Prepare 3D integrated shop drawings of the W2 cap beam, and find and resolve conflicts.
- Develop design criteria for the temporary erection towers and trusses.
- Perform an independent design check of the temporary erection towers and foundations.
- Perform an independent design check of the temporary erection trusses.
- Perform an independent design check of the temporary segment cradles.
- Provide additional engineering services as needed.
