Thank you Geeky biswa =')
I can deal with PV's weight, and applied it into the structure, but what I'm asking about is the wind load influence on the roof,
when I do wind load analysis, I take into consideration 3 cases:
wind from left, wind from right and wind from front
and in each case the load will be suction (negative) on the roof ,
and the point which I can't decide about it, Am I have to apply this suction (negative wind load) to the inclined beams which the PV's will be applied directly??? or to the two parallel beams???