JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. AD.2007-07.3.2.3 IS456 with Seismic Design per IS13920 Note: The legacy Concrete Design workflow (included in V8i and earlier as the RC Designer application) has been deprecated in favor of the Advanced Concrete Design workflow using RCDC. Parent topic: AD.2007-07.3.2 RCÂ Designer