The new Bay Bridge between San Francisco and Oakland included 2.1-mile of bridge structure, including a single tower signature span of 1,263 feet and the skyway.  The skyway is approximately 6,900 feet long of post-tensioned concrete, and was built by precast segmental construction.  It has 525 feet typical span that carrying 5 lanes with LRT in each traffic direction.  The width of precast segment is more than 87 feet.
 
JMEC has been structural consultant for the design of the EB and WB skyway, the main span foundation, and redesigned the tower saddle and shear keys at Pier E2 using forces calculated by the design team.  Specific work items included the following:

Special Issues:  Challenges with minimizing weight in large 8 m normal weight concrete segments in combination of using a steel end span to allow for balanced cantilever construction.  Construction of the heavily reinforced hinge segments, pipe beams, steel tower and steel box as required for seismic resistance.  Worked with Caltrans and contractors to resolve field issues.

Schedule:  Open to traffic on September 2, 2013

Awards:  The project won many awards including the Project of the Year Award 2013 - ASCE Region 9; Outstanding Transportation Project Award 2013 - ASCE San Francisco Section; Award of Excellence, Infrastructure 2014 - SEAOC; Outstanding Structure Award 2015 - IABSE; America's Transportation Award, Grand Prize 2014 - AASHTO and many others.