OPAC is a San Francisco based engineering firm founded in 1992 by a group of experienced and enthusiastic engineers who have worked together since the late 1970s. Since then, we have successfully addressed many engineering challenges around the world. Our goal is to provide sound engineering technology and judgment toward the design and construction of bridges and other structural systems.
Whether you are an owner looking for design or evaluation of structural system, a contractor looking for construction engineering support, or a design professional looking for design or engineering support, look to OPAC. The mainstay of our practice is bridge engineering, and the firm has made significant contributions in that field. We have provided design services on suspension bridges, cable-stayed bridges, arch bridges, segmental girders, complex interchanges, and other structures such as concrete shell domes.
We have evaluated bridges for constructability, seismic performance, and wind and collapse assessment.
Whether you are an owner looking for design or evaluation of structural system, a contractor looking for construction engineering support, or a design professional looking for design or engineering support, look to OPAC. The mainstay of our practice is bridge engineering, and the firm has made significant contributions in that field. We have provided design services on suspension bridges, cable-stayed bridges, arch bridges, segmental girders, complex interchanges, and other structures such as concrete shell domes.
We have evaluated bridges for constructability, seismic performance, and wind and collapse assessment.
Services
OPAC takes great pride in providing high quality, well-managed, cost effective, and timely professional engineering services to our clients.
We have successfully completed projects in the United States, Canada, Central America, South America, and various countries of the Pacific Rim.
We are committed to excellence and innovation in our worldwide consulting engineering services.
Our goal is to be responsive and service-oriented, and to provide our clients with the best possible solutions for each project.
We have successfully completed projects in the United States, Canada, Central America, South America, and various countries of the Pacific Rim.
We are committed to excellence and innovation in our worldwide consulting engineering services.
Our goal is to be responsive and service-oriented, and to provide our clients with the best possible solutions for each project.
OPAC has a broad portfolio of completed bridge and structural engineering projects.
Some of our projects - across all structure and service types - are listed below.
Use the Projects submenus above to browse more complete listings of projects by structure type.
Structural design and construction support for BART traction power facilities replacement projects.
Design of a girder bridge or an arch bridge to replace an existing arch bridge in rural Sonoma County.
Design of a concrete arch bridge to replace the existing truss bridge in rural Sonoma, California.
Some of our projects - across all structure and service types - are listed below.
Use the Projects submenus above to browse more complete listings of projects by structure type.
Structural design and construction support for BART traction power facilities replacement projects.
Design of a girder bridge or an arch bridge to replace an existing arch bridge in rural Sonoma County.
Design of a concrete arch bridge to replace the existing truss bridge in rural Sonoma, California.
OPAC's work on segmental bridges included design, design review, construction review, construction engineering, engineering investigation and collapse investigation.
Our principals have contributed in some of the earliest segmental bridge designs in the United States.
Peer review and independent design check of a multiple levels freeway interchange built by segmental method.
Construction engineering for a 1,090 ft concrete arch bridge downstream of the Hoover Dam.
Engineering investigation of a segmental bridge that consists of a nine-span 2,340 ft long concrete girder.
Our principals have contributed in some of the earliest segmental bridge designs in the United States.
Peer review and independent design check of a multiple levels freeway interchange built by segmental method.
Construction engineering for a 1,090 ft concrete arch bridge downstream of the Hoover Dam.
Engineering investigation of a segmental bridge that consists of a nine-span 2,340 ft long concrete girder.
OPAC's work on arch bridges included design, design review, construction review, construction support and seismic evaluation.
Our principals have contributed creative design solution in some unique arch bridge projects prior to OPAC.
Design of a concrete arch bridge to replace the existing truss bridge in rural Sonoma, California.
Design and construction support for an asymmetrical arch bridge in rural Sonoma, California.
Construction engineering for a concrete arch bridge across Smith River near Del Norte, California.
Our principals have contributed creative design solution in some unique arch bridge projects prior to OPAC.
Design of a concrete arch bridge to replace the existing truss bridge in rural Sonoma, California.
Design and construction support for an asymmetrical arch bridge in rural Sonoma, California.
Construction engineering for a concrete arch bridge across Smith River near Del Norte, California.
OPAC's work on cable-supported bridges included design, design review, construction engineering, seismic evaluation and engineering investigation.
We designed the longest span new suspension bridge in the United States in over 35 years when it was completed.
Our principals have worked on design and construction engineering on a few cable-stayed bridges prior to OPAC.
One of our principal directed the precedent-setting seismic evaluation and retrofit strategy studies of the Golden Gate Bridge in the late 1970's.
We designed the longest span new suspension bridge in the United States in over 35 years when it was completed.
Our principals have worked on design and construction engineering on a few cable-stayed bridges prior to OPAC.
One of our principal directed the precedent-setting seismic evaluation and retrofit strategy studies of the Golden Gate Bridge in the late 1970's.
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