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Seismic forces for non-building structures

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BENDOG

Structural
Joined
Feb 9, 2007
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US
I am designing a piled foundation for a large industrial fan weighing 155 kips. I am using ASCE 7-02, SDC-A. I am confused as to what section I should be using to calculate the seismic lateral forces on the fan and pile cap. According to 9.14.4 I should use 9.6.1.3 if the fan is less than 25% of the combined weight of fan + pile cap. From Table 9.6.3.2 I get Rp=2.5 for general mechanical equipment. Do I also apply Rp=2.5 to the pile cap? Or is there another section in the code that I should be using?
 
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