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RE: Seismic mass[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Seismic mass
- From: "Eli Grassley" <elig(--nospam--at)psm-engineers.com>
- Date: Tue, 7 Feb 2006 09:32:15 -0800
Only the portion above grade. Seismic forces are generated from displacement of an object relative to it’s contact point with the earth surface. Anything buried below grade just goes along for the ride.
That’s not to say that the bookshelf down in the basement isn’t going to fall on your head if you’re down there during the big one though!
~~ Eli ~~
Just a conceptual question: If the building has a basement, do you include the basement in the calculation of the seismic mass, or only the portion above ground? Thanks in advance.
Javier Encinas, PE
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