STAAD.Pro HelpDesignD. Design CodesD1.American Codes D1.American Codes D1.A. American Codes - Steel Design per AISC 360 Unified SpecificationD1.B. American Codes - Steel Design per AISC 9th EditionD1.C. American Codes - Steel Design per AISC LRFD SpecificationThe 2nd and 3rd editions of the American AISC LRFD code have been implemented. The commands to access those respective codes are:D1.D. American Codes - Steel Design per AASHTO SpecificationsDesign to AASHTO Standard Specifications for Highway Bridges utilizing the ASD and LRFD approaches are available in STAAD.Pro. These are described in the following two sections. D1.E. American Codes - Steel Design per AISI Cold Formed Steel CodeD1.F. American Codes - Concrete Design per ACI 318D1.G. American Codes - Timber Design per AITC CodeD1.H. American Codes - Aluminum Design per 1994 ADMD1.I. American Codes - Steel Design per ASCE Transmission Tower CodesD1.J. American Codes - Steel Design per API 2A-WSD 2000D1.K. American Codes - Steel Design per ANSI/AISC N690 Design CodesD1.L. American Codes - Steel Design per ASME NF CodesThe following American Society of Mechanical Engineers – Nuclear Facility codes are available.Parent Topic: D. Design Codes