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Original poster's email address:		required
Original poster's Name:		optional
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Photo:	click to enlarge
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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:	The I. Magnin project was a seismic retrofit of a historic four-story steel-framed building using propped shear walls. The latter allowed the owner to preserve the Art Deco terra-cotta-and-stone façade while retaining maximum open-floor space. The system consists of a tall, slender concrete shear wall propped near the top with multistory diagonal steel braces. During large earthquakes, the slotted, bolted friction connections of the steel props, along with flexural yielding at the base of the shear wall, provide seismic-energy dissipating mechanisms. This system creates a high-performance lateral system that is less expensive and less architecturally intrusive than either steel braced frames or concrete shear walls acting alone. Modern Steel Construction magazine documented the retrofit in the article “Propped Shear Walls: Combining Steel Braces and Concrete Shear Walls for Seismic Strengthening of Existing Buildings.” Structural engineer: Tipping Mar (www.tippingmar.com) Architect: Ibsen Senty Architecture Contractor: Westfour Corporation Owner/Developer: SRM AssociatesThis 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 19901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021	optional
Verification:	Enter in the letters and/or numbers you see in the image.	required
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