Dear Sir,
I m using caesar version 4.5 and relatively new to this field. In the project, according to client requirment for seismic analysis,
response spectrum method is to be followed . Combination of responses due to multicomponent seismic accelerations are according to following


Rcom=max of {±Rx±.3Ry±.3Rz
{±.3Rx±Ry±.3Rz
{±.3Rx±.3Ry±Rz
where Rx,Ry and Rz are Response quantity.and Rcom is combined Response

so we have taken following approach
Spectrum Factor Dirction
specrumname 1 x (d1)
specrumname 1 y (d2)
specrumname 1 z (d3)
and we have considered following load cases

1. sustained + d1+.3d2+.3d3
2. sustained + d1+.3d2-.3d3
3. sustained + d1-.3d2+.3d3
4. sustained - d1+.3d2+.3d3
5. sustained + d1-.3d2-.3d3
6. sustained - d1+.3d2-.3d3
7. sustained - d1-.3d2+.3d3
8. sustained - d1-.3d2-.3d3
9. sustained + .3d1+d2+.3d3
10. sustained + .3d1+d2-.3d3
11. sustained + .3d1-d2+.3d3
12. sustained - .3d1+d2+.3d3
13. sustained + .3d1-d2-.3d3
14. sustained - .3d1+d2-.3d3
15. sustained - .3d1-d2+.3d3
16. sustained - .3d1-d2-.3d3
17. sustained + .3d1+.3d2+d3
18. sustained + .3d1+.3d2-d3
19. sustained + .3d1-.3d2+d3
20. sustained - .3d1+.3d2+d3
21. sustained + .3d1-.3d2-d3
22. sustained - .3d1+.3d2-d3
23. sustained - .3d1-.3d2+d3
24. sustained - .3d1-.3d2-d3
25. operating + d1+.3d2+.3d3
26. operating + d1+.3d2-.3d3
27. operating + d1-.3d2+.3d3
28. operating - d1+.3d2+.3d3
29. operating + d1-.3d2-.3d3
30. operating - d1+.3d2-.3d3
31. operating - d1-.3d2+.3d3
32. operating - d1-.3d2-.3d3
33. operating + .3d1+d2+.3d3
34. operating + .3d1+d2-.3d3
35. operating + .3d1-d2+.3d3
36. operating - .3d1+d2+.3d3
37. operating + .3d1-d2-.3d3
38. operating - .3d1+d2-.3d3
39. operating - .3d1-d2+.3d3
40. operating - .3d1-d2-.3d3
41. operating + .3d1+.3d2+d3
42. operating + .3d1+.3d2-d3
43. operating + .3d1-.3d2+d3
44. operating - .3d1+.3d2+d3
45. operating + .3d1-.3d2-.d3
46. operating - .3d1+.3d2-d3
47. operating - .3d1-.3d2+d3
48. operating - .3d1-.3d2-d3

Plz confirm whether this approach is right.
If yes, then Caesar 4.5 allows only upto 40 cases.so what should be done to incoprate all the cases.


thanks