---Quoted as Client Comments--------
Application for Wind and Seismic specifies that the combined sustained and occasional loads (such as wind or seismic) be limited to 1.33 times the allowable stress at temperature. The document further stipulates the equivalent static seismic load factor to be 70% of the seismic design load. It is therefore wrong to reduce the occasional loads and increase the allowable stress to which the resulting stresses are be compared to at the same time. Although to be fair, of the piping flexibility analyses we have reviewed the 1.33 allowable stress increase was not used; only the seismic equivalent static load was multiplied by 0.7. Even so,this is not in compliance with the B31.3 Code which says to not factor occasionalloads and limits the resulting stresses to 1.33 times the allowable at temperature. It is also slightly un-conservative as 1/0.7=1.43 which is higher than the code permitted factor of 1.33 on stress. The piping flexibility analyses are under-reporting the stresses in occasional load cases for Code evaluation.
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Question
1. As per ASCE, is it wrong application using factor 0.7 as defined on ASD(Allowable Stress Design)in AISC?
In CAESAR Seismic Wizard, the seismic acceleration factor is calculated considered factor 0.7?

2. Is it using duplicated margin in calculating seismic factor using factor 0.7 and pipe stress allowable 1.33h in occasional?