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Re: 1920's 9 story concrete frame building

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I agree, particularly if the non-ductile concrete frames are in the short
direction.  This building probably also has a height to width ratio of 3-4. Even
if you had plans, you probably won't find the column steel tied with anything
more than #2 (two) smooth ties at 12" oc.

Jeff Smith wrote:

> A past client of mine is putting in a bid for a condo flat in Pacific
> Heights S.F. Million dollar views, very exclusive. It has a concrete frame
> in the short direction and property line infill walls in the long direction.
> It could be on bedrock. The floors are concrete pan joists. The building is
> 9 stories with single units per floor. My initial reaction without any
> analysis is....not a good idea. Is there any possibility that a building
> like this could have any margin of safety during a near fault 7.0
> earthquake? Building plan records are available, but not until after the bid
> date is due. My only comment will be that this building is not expected to
> do well during a credible seismic event.
> Regards,
> Jeff Smith