siesmic

Because of extensive, historic interior finishes, as well as other structural aspects of the
building, it was decided to retrofit the building utilizing a seismic base isolation system. The
state-of-the-art base isolation system, one of the few systems installed in the United States,
provided the stability for the structure while maintaining the historical character of the
building.

Structural Retrofit of the Sierra Pacific

North Lake Tahoe Maintenance/Operations Center

Tahoe Vista, CA: This project is very similar in nature to the proposed retrofit project. It
involved the structural strengthening, both for snow load as well as seismic load, of an
existing masonry building with wood-framed roofs. The existing building was upgraded
from a snow load capacity of 20 psf to 180 psf and was designed for a "critical facility"
designation.

Structural Retrofit of the Ski Incline Main Lodge

Incline Village, Nevada

This project involved the structural engineering snow load upgrade of an existing wood
framed roof structure on the existing main lodge building at Ski Incline ski area. New dormer
openings were constructed in the roof; existing beams were reinforced for the revised load
path as well as the upgraded code snow load (from 120 psf to 240 psf).

Structural Retrofit of the Aeroject-Lockwood Nevada Rocket Motor Test Facility

Largomarsino Canyon, Nevada

The Largomarsino Test Facility was comprised of seven large premanufactured metal
buildings. These buildings were built by the original owner of the facility without regard to
snow load; during the ensuing winter, the high snow load caused damage to many of the
buildings. Ferrari Shields upgraded the structural capacity of the metal buildings from 20 psf
to 60 psf.

Structural Repair of the Mervyns Building

Reno, Nevada

This project was unique in the fact that the building was occupied during the entire repair
effort. The roof construction of the building experienced major beam failures and portions of
roof collapse during the winter of 1990-91. An investigation of the roof-framing members
revealed that over 90% of the glued-laminated purlin beams had manufacturing problems
and were prone to failure. The repair method that was used involved the installation of a
new structural beam grid above the roof of the existing, problem structure, supported on the
existing column grid. Steel rods were extended down from the new structural beam grid;
the rods were drilled into the top of the defective beams and epoxy anchored. Using this
method, the existing roof and framing did not have to be removed, allowing the tenant,
Mervyns, to remain operational during the entire repair process.