JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. D1.C. American Codes - Steel Design per AISC LRFD Specification The 2nd and 3rd editions of the American AISC LRFD code have been implemented. The commands to access those respective codes are: For the 3rd edition code: PARAMETER CODE LRFD or PARAMETER CODE LRFD3 For the 2nd Edition: PARAMETER CODE LRFD2 D1.C.1 General Comments D1.C.2 LRFD Fundamentals D1.C.3 Analysis Requirements D1.C.4 Section Classification D1.C.5 Limit States D1.C.6 Design Parameters D1.C.7 Code Checking and Member Selection D1.C.8 Tabulated Results of Steel Design D1.C.9 Composite Beam Design per the AISC LRFD 3rd edition code Parent topic: D1. American Codes