I have also another question for the same type of load case.
He only considers Wind positively in plan WIN1(x) and WIN2(z). He don't consider WIN3 for (-x) and WIN4 (-z)(wind is define as a pressure f(elevation)). Can he do that?

And when he combines wind with the sustain loads, he considers as absolute (ABS)combination and not Scalar. And he don't consider the wind effects on the restrains because he don't combine it with the operation cases.

Is it correct?

Personaly i used to combine the wind with the sustain as scalar and first of all with the operating case. and if the restrains values of OPE+WIN are higher then OPE, I consider the OPE+WIN to modelise the suports.

Sorry my english is very bad.

Thanks