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