Hello there; Basic strengthening is not available in idecad v10.17. Performance analysis is made according to the principles described in TBDY Chapter 15. Earthquake analysis and application limits are applied according to "TBDY Section 15.5 Linear calculation methods and earthquake calculation section", and evaluation results are applied according to "TBDY Section 15.7 Limits of deformation". Chapter 15 also does not contain specific articles on strengthening foundations. Best regards...