OPAC Consulting Engineers

Self-Anchored Suspension Bridge Pre-Bid Services

San Francisco - Oakland Bay Bridge, California


Heavy Industries Co., Ltd (IHI)
Chita City, Japan
Yoichi Sato
Tel: 81-3-3534-3224


Pre-bid services completed 2003

Scope of work:

Construction Engineering


Construction cost

Services Performed:

  • Preliminary design of temporary towers
  • Pre-bid engineering support


  • Construction services of unusual bridge
  • 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 is currently being constructed using temporary towers and barge-mounted cranes.

OPAC was engaged by Ishikawajime-Harima Heavy Industries Co., Ltd (IHI) of Japan to provide engineering services during the bidding period. Services included preliminary design of the temporary towers and foundations (to the 50% design level adequate for bidding) as well as highlighting the project special provisions and reviewing bidder inquiries for this non-English speaking client.