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Original poster's email address:		required
Original poster's Name:
	Publicly display my name on site.         (check this & save to edit name)
Photo:		optional (MAX file size 3MB)
Lat:		required
Long:		required
Building Type	- Choose - Residential Commercial Institutional Hospital, Police, Fire Station Bridge or Transit Structure Other, Mixed, or Don't Know	required
Title:	The title can be the building name, an address, or any other short descriptor, such as "Third Street Office Building," "Hayward church," or "My Oakland condo."	required
Description:	Hearst Memorial Mining Hall (built in 1907) is an imposing four-story structure originally made of unreinforced brick masonry with exterior cladding of granite masonry. Infill reinforced concrete floors were added to provide additional structural support and occupiable space in 1947. In a 1990 study, engineers found the following problems: the masonry brick walls were weak due to their lack of reinforcement; the floor slabs had insufficient connection to the masonry brick walls; the front façade, chimneys, terra cotta tile ceilings, and stone ornamentation could all fall during an earthquake. Knowing the building’s proximity to the Hayward fault, the selected retrofit solution was “base isolation.” This technique improves the seismic performance of the building by placing the building on bearings that is stiff in the vertical direction and flexible in the horizontal direction. Because the bearings are flexible horizontally, the ground can shake at a more vigorous rate than will be experienced in the structure above the bearings. By separating the building from the ground or “isolating” it with these bearings, the fragile components of the building like the façade, chimneys, etc. will likely remain undamaged during an earthquake. The retrofitted building is now supported on 134 rubber-laminated steel bearings (also called isolators) so the building is able to move 28 inches horizontally in any direction during an earthquake. These bearings are also very resistant to natural degradation. This retrofit system utilized the new concept of performance-based design, which surpasses building codes by tailoring a building’s design to its desired performance after an earthquake. This University of California Berkeley building was retrofitted as a part of the SAFER Program (Seismic Action for Facilities Enhancement & Renewal) which systematically reviewed, prioritized, and constructed building retrofits for all UC Berkeley owned and operated buildings. Retrofit Engineer: Rutherford and Chekene Retrofit Architect: NBBJThis is optional, but we hope you'll share what's significant or interesting to you about this retrofit. What prompted the retrofit project? Was it part of a larger project or program? What was the retrofit objective? Feel free to give engineering or cost details. What's your relationship to the project? You may add your company's name or a link to another site with more project details, as long as your Description is not soliciting business.	optional
Original Structure Type	- Choose - Wood Unreinforced Brick Reinforced Masonry Concrete Steel Other Don't Know	optional
Retrofit System Type	- Choose - Wood Reinforced Masonry Concrete Steel Isolation Hybrid or Other Don't Know	optional
Year of Retrofit:	- Year - Don't know pre-Loma Prieta 1989, post-Loma Prieta 199019911992199319941995199619971998199920002001200220032004200520062007200820092010	optional
Verification:	Enter in the letters and/or numbers you see in the image.	required
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