Rutherford
& Chekene has been involved in the field of articulate, aesthetic
and unique seismic strengthening of historic buildings for over
40 years, including nine projects on the National Register of Historic
Places. Each of these structures was rehabilitated in accordance
with the Secretary of Interior Standards.
The
Ferry Building, San Francisco, California: Built in 1896,
the monumental Beaux Arts building is a San Francisco landmark.
In addition to seismic rehabilitation, this adaptive reuse project
involved substantive structural renovation. The central nave has
been opened for the 660-foot length of the building to create a
three-story, sky lit space for restaurants and retail shops at ground
level. The seismic rehabilitation was adapted to special foundation
conditions; the Ferry Building is constructed entirely over water.
UC
Berkeley Hearst Memorial Mining Building, Berkeley, California:
This National Register building, erected in 1907, is of unreinforced
brick and granite bearing wall construction. Although it possessed
substantial strength, it could not survive the expected ground shaking
that
would occur at its location 800 feet from the Hayward Fault. The
seismic rehabilitation, using base isolation required a minimum
of superstructure strengthening, allowing the historic character
of the building to be preserved while creating a contemporary teaching
and research facility.
California
Rehabilitation Center, Building 101, Norco, California:
Rutherford & Chekene has provided seismic retrofit services
to the California Department of General Services, using FEMA 356
methods,
through continuous multi-year contracts starting in 1992. The 204,000
sf Norco Administration Building was erected in 1928 and originally
served as a luxury hotel. The seismic strengthening addressed seismically
deficient concrete frames infilled with unreinforced masonry by
the careful introduction of new concrete wall elements.
Berkeley Public Library, Berkeley, California:
The
City of Berkeley has successfully undertaken a program of seismically
strengthening its key public buildings. This project consisted of
the seismic rehabilitation of an existing 37,500 sf building by
linking it to a new five-story, 70,000 sf addition. This allowed
for the preservation of interior and exterior architectural elements
of the building, including the 45-foot tall Reference and Reading
Room. The library is on the National Register of Historic Places.
The Frank Lloyd Wright Hanna House, Palo Alto,
California: The AIA designated Hanna House as one of “17 buildings
designed by Wright to be retained as an example of his contribution
to American culture."Built in 1937, the Hanna House was Wright's
first foray into hexagonal design module and one of his most sophisticated
Usonian projects. Badly damaged by the Loma Prieta earthquake, the
house required extensive renovations. The rehabilitation was accomplished
under the guiding
principal that the restored house should look untouched from its
original design. The retrofit scheme involves center coring of the
masonry chimneys, new foundation elements, and roofing improvements,
together with strengthening the inside of the existing perimeter
2 1/2 inch thick wood walls. A full-size prototype of a strengthened
wood wall successfully passed dynamic cycle tests designed to simulate
the ground motion produced by the nearby San Andreas Fault.
UC Berkeley South Hall, Berkeley, California:
Built in 1873, South Hall is the oldest building in the statewide
University of California system and is included in the National
Register of Historic Places. To allow preservation of interior and
exterior architectural finishes, an innovative rehabilitation method
was employed utilizing center-cored reinforcing bars, which were
introduced vertically into the unreinforced brick masonry walls.
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