I am analyzing an ordinary moment frame of steel using the AISC Design Guide 25. I had built extensive spreadsheets to calculate stress ratios from the AISC 9th edition, appendix F, and am now getting familiar with the new design guide. I am currently struggling to find the understanding of how this design guide would be codified in language of the IBC 2009. Should I still be using AISC 9th edition since the design guide 25 came out after the adoption of IBC 2009?
The main difference that I see in the AISC design guide 25 is the use of P-delta effects and the design guide goes into great detail using 2nd order effects and gives alternatives for using the amplified 1st order effects.
Any comment is welcome. Thanks.
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