Ingenuity, I thought the same thing but everything I find regarding the Chicago Building code says to use the AISC ASD 9th or AISC LRFD 1st editions...
Is it really required to use AISC ASD 9th or AISC LRFD 1st edition for design in Chicago? I am doing a composite steel podium floor on an 7 story light gage steel structure. Can I not use the "latest and greatest" when it comes to design standards?