Note that with Version 4.40, you can look at <em>positive</em> and <em>negative</em> directions simply by building additional load cases. For example, assume:

• WIN1 is +X
• WIN2 is +Z

then

• 1) W+P1+T1+WIN1 (OPE) is operating plus wind in +X
• 2) W+P1+T1-WIN1 (OPE) is operating plus wind in -X
• 3) W+P1+T1+WIN2 (OPE) is operating plus wind in +Z
• 4) W+P1+T1-WIN2 (OPE) is operating plus wind in -Z

So, checking <em>positive</em> and <em>negative</em> wind load directions is simply a matter of defining additional load cases.