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B851
Puget Sound Naval Shipyard, Bremerton, Washington
A complete seismic upgrade and roof repair, including fall protection guardrails, for a 1970’s industrial woodworking shop.
AWARDS
B851
Puget Sound Naval Shipyard, Bremerton, Washington
B851
Puget Sound Naval Shipyard, Bremerton, Washington
SIZE
86,598 SF
COMPLETION
2016
CONTRACTOR
Idaho Stage Construction
DELIVERY METHOD
Design-Build
CERTIFICATIONS
SERVICES
The project renovated a Woodworking Shop built in the 1970s. The shop building received a complete seismic upgrade to bring the structure up to code requirements to protect personnel in the event of an earthquake. In addition, the project replaced the existing, built-up roof with a fully-adhered PVC roof membrane system, including improved insulation. The roof repair included the addition of a ballasted guardrail system to protect maintenance personnel accessing the roof without the need for roof penetrations. The investigations and construction work for the upgrade required the building to remain continuously in operation, creating additional complexities for the design and construction process.
Seismic Upgrade: The seismic upgrade of this building applies the ASCE 41-13 seismic assessment and rehabilitation process. The building was originally constructed in 1971, prior to many enhancements in the building code that require a clear and defined load path for lateral force restraint. The investigation involves looking at the building with both a linear dynamic and non-linear static (push-over)
methodologies as a means of accurately determining and designing the best value improvements. The upgrade adds new steel pipe cross bracing around the perimeter of the building to improve the seismic load path, reinforcement of existing steel angle cross bracing, and reinforcement of select steel columns.
Roof Repair: The roof repair includes the design and construction of a brand-new roof and safety rail system. Due to the continuous operation of the facility, the project accounted for providing temporary roofing to provide continuous weather protection over the project duration. WJA-dc selected a ballasted roof railing system that can utilized during construction for safety and left in place permanently at the completion of the project. Although the ballasted railing system has a higher first cost, this process saved the overall project thousands of dollars in construction scheduling impacts.
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