STAAD.Pro HelpDesignD. Design CodesD13.Russian Codes D13.Russian Codes Note: Concrete design using the following codes has been deprecated in STAAD.Pro: SNiP 2.03.01-84* SP 63.1330.2012 D13.A. Russian Codes - Steel Design Per SNiP 2.23-81* (Edition 1990)D13.B. Russian Codes - Steel Design Per SP 16.13330.2011D13.C. Russian Codes - Steel Design per SP 16.13330.2017Parent Topic: D. Design Codes