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RE: Why 0.2 and 1 sec for Ss and S1?

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Reference the FEMA 450-2, Section 3.3

Harold Sprague

From: kimwontae(--nospam--at)
To: seaint(--nospam--at)
Date: Wed, 5 Dec 2007 08:02:11 -0500
Subject: Why 0.2 and 1 sec for Ss and S1?

I am wondering why 0.2 sec and 1 sec were chosen for
 spectral response accelorations at short- and long-period .
Is it because these two periods can represent the seismic conditions of most buildings very well?

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