Does anyone know why in the “2006 IBD Structural/Seismic Design Manual Vol. 2” same problem as earlier stated, see below, the duration of load, CD, was used as 1.33 instead of the 1.6 that the NDS allows?
Jason
From: ECVAl3@aol.com [mailto:ECVAl3@aol.com]
Sent: Friday, February 15, 2008 4:24 PM
To: seaint@seaint.org
Subject: Seismic Design Example
For those of you that have and understand the "2006 IBC Structural/Seismic Design Manual Vol.2" I have a question.
On page 32 to determine the Anchorage at A on a perforated shear wall:
Going from the formula (0.9-0.2*SDS)*D + Wo*QE
Wo = 3.0, SDS = 1.19
they suddenly go to the formula (0.9-0.2*SDS)*D + Wo*E
Putting the numerical values in they get (0.9-0.2*1.19)*D + 0.66*D
My question is, how did they get 0.66*D from Wo*QE or Wo*E ?
Can anyone shed some light on this for me?
Thank you,
S.Macie
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