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RE: Sds for building elements and Connections

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Larry,

This is my first time responding to a question, so I don't know if I am doing this right or not, or if you will get this response or not.  But, here goes . . .

ASCE 12.14.7.5 for anchoring walls, refers to 12.14.8.1 when calculating the "design spectral response", Sds (which means you can use the reduced Sds=1.0), and 12.14.7.6 for designing bearing walls and shear walls, says to use the "design spectral response acceleration Sds".  My interpretation is that these are both the same Sds used in 12.14.8.1.

Best,
  
Robert M. Moyle, SE
 
-----Original Message-----
From: lrhauer(--nospam--at)earthlink.net [mailto:lrhauer(--nospam--at)earthlink.net] 
Sent: Friday, March 06, 2009 9:31 AM
To: SEAOC
Subject: Sds for building elements and Connections

Thought I had sent this message yesterday, but didn't see it on the list server, so here it is again:
 
I am designing a simple one story masonry building in a location where the Sds is 1.6. But since the structure meets all the requirements for design as a "Simple Bearing Wall" building, I am using a base shear per ASCE formula 12.14-11 which allows for a maximum Ss of 1.5 or an Sds of 1.0. I assume in reading ASCE section 11.4.1 and 11.4.4 that this lower Sds value can also apply to the design of the masonry walls and connections of walls to roof. Is my logic correct??
 
Thanks in advance,
 
Larry Hauer S.E.




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