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ASCE 7-05 Determing (Ap) Amplification Factor in Eq.13.3-1

ASCE 7-05 Determing (Ap) Amplification Factor in Eq.13.3-1

ASCE 7-05 Determing (Ap) Amplification Factor in Eq.13.3-1

(OP)
I am trying to understand the amplification factor(Ap).  Sorry for being all over the place with this post but this is my first time using these equations.  Also I will have a P.E look it over I am just trying to get a feel for it.  

I have a column with a mass at the top with a fundamental period greater than 0.06s.  According to the definition of Flexible Components Chap.11, I would have to use an Ap=2.5 if I follow footnote (a) of Table 13.6-1.

Do i have to calculate the period?
OR
Could I just take numbers for "Ap" & "Rp" from Table 13.6-1 "Mechanical and Electrical Components".   

Even though I have a mechanical component I am not sure if I fall under any of the sections of Table 13.6-1.  I am thinking I could fall in the second row of the table with the last statement "other mechanical components contructed of high-deformability materials".  Or could I justify just using the section "other mechanical or electrical components"?

How do I determine if I have a high-deformability material?...not familiar with these equations.



 
    

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