This contains SACS wikis related to the SACS PSI program.

1. A step-by-step approach to Pile/Soil Interaction (PSI) analysis and diagnosing errors
2. Pile Super element Matrix
   3. Error message with **ERROR-STIFFNESS MATRIX IS NON-POSITIVE DEFINITE FOR LOAD CASE#
   4. Nonsymmetrical T-Z curve
   5. Single Pile Analysis
   6. Soil Behavior Representation in SACS and Pile Increment
   7. Soil Liquefaction
   8. Pile thickness effects Pile Capacity?
   9. Compression & Tension Capacity Considering Pile Weight
   10. Pile analysis - Compression Capacity
   11. Pile Look Up Error
   12. PSI factors for SACS input
   13. No Soil plot in Chart Files
   14. ERROR - SOIL T-Z HAS ILLEGAL STRATA ORDER & ERROR - SOIL STRATA DESCRIPTION
   15. Consideration of soil liquefaction in PSI input
   16. PSI warning on DY-RZ Stiffness
   17. CPT data in PSI input
   18. Pile Code Check
   19. Pile Local Co-ordinate System
   20. ERROR NUMBER OF SOIL TABLES BEING INPUT EXCEEDS THE NUMBER INDICATED BY PILE INPUT
   21. Tubular Section resistance factors with Piles
   22. API Option in PSI input Line
   23. Limit of convergences for Displacement and Rotation in PSI
   24. Pile Number Limitations
   25. PSI Result interpretation with Internal Force, Stiffness Matrix, Force comparison etc
   26. SACS PISA Curves
   27. PSI Convergence criteria check
   28. Load Superposition in PSI
   29. Viewing PSI results output in the list file
   30. Factors to be considered when calculating large diameter piles in SACS
   31. P-delta effects on PSI Analysis
   32. Axial Capacities differences