Hello all,

For ASCE 7-10 Chap.13, there are 3 Fp values as below which gives you calculated value(by 13.3-1) and the max value(13.3-2), and lastly min value(13.3-3) as follow.

Fp = 0.4*ap*SDS*Wp/(Rp/Ip)*(1+2(z/h)) : 13.3-1
Fp = 1.6(Sds)IpWp : 13.3-2
Fp = 0.3(Sds)IpWp : 13.3-3

Here is the question. If calculated values from 13.3-1 is less than 13.3-3 value (my Rp is 12 according to table 13.6-1), would it be possible to use 13.3-3 values for the project seismic factors? Would it violate the ASCE 7 rules?