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Sally McFadden

Sally McFadden

Oakland, CA, US

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Street view as work gets underway. A new pitched roof and turret will restore the original look of the building which was damaged by fire in the 1960's.
Street view as work gets underway. A new pitched roof and turret will restore the original look of the building which was damaged by fire in the 1960's.
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SEISMIC REHABILITATION OF A SAN FRANCISCO VICTORAIN

This project involves extensive structural and architectural work on a classic San Francisco painted lady single-family Victorian home.  As is often the case, the front and back walls of this building consist mostly of windows and doors, so initially the building had very little lateral load resisting capacity.   Our challenge was to strengthen the building while minimizing disruption of the elaborate finishes.  We were able to add plywood shear walls on the interior short direction walls, but the very limited wall space on the front and rear lines called for the use of steel frames.  To keep drift to within code limits we bolted  the frames to new concrete walls in the basement. 

 
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Status: Under Construction
Location: San Francisco, CA, US
My Role: Project Engineer
Additional Credits: Paul J. Pieri, P.E., Senior Engineer, BHW Engineers, LLC
Jeff Kroot & Assoc. - Architect, San Anselmo, CA
Wick Brothers Builders, Woodacre, CA

 
Looking toward the rear of the garage with the new Line D footings in the foreground and the new Line A concrete wall vivible at the rear.
Looking toward the rear of the garage with the new Line D footings in the foreground and the new Line A concrete wall vivible at the rear.
Ground and main level plans, structural detail.
Ground and main level plans, structural detail.
Plans
Plans
Roof and new rooftop deck framing plan and Line D shear wall elevation.
Roof and new rooftop deck framing plan and Line D shear wall elevation.
Structural details at the Line A exterior wall, including new Hardy Frames, PSL drag beams, and an Ordinary Steel Moment Frame bolted to a new concrete wall at the ground level.
Structural details at the Line A exterior wall, including new Hardy Frames, PSL drag beams, and an Ordinary Steel Moment Frame bolted to a new concrete wall at the ground level.
Interior framing. Note the shearwall on the Line C steel beam.
Interior framing. Note the shearwall on the Line C steel beam.
Structural details at Line F, including new MC10x28 Ordinary Steel Moment Frame. This frame has to fit inside the existing wall framing and some of it will have to be welded in situ.
Structural details at Line F, including new MC10x28 Ordinary Steel Moment Frame. This frame has to fit inside the existing wall framing and some of it will have to be welded in situ.
Example hand calculation.
Example hand calculation.
Example load table.
Example load table.
Example hand calculation: seismic overturning on new floor beam.
Example hand calculation: seismic overturning on new floor beam.
Example hand calculation:seismic overturning on new floor beam.
Example hand calculation:seismic overturning on new floor beam.

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