I need some help with a statics design problem. I am tasked with designing a solar panel frame to mount on a building and am the only engineer on staff so I don't have anyone else to ask the simple dumb questions. Since I have no real experience doing wind load calculations I figured I would assume a load normal to the solar panel face. My idea is to use two square aluminum tubes mounted along the long side of the three solar panels stacked vertically along the tube. My analysis involves the support structure for one side, of one array column. As of right now I am hoping the solar panels themselves will suffice as cross-member connections. The details really don't matter, in fact the wind loading really doesn't matter either. It is the method I am having trouble with.
Want it to be able to withstand 125 MPH gusts. That appears to equate to 30 lbf/square foot. Given 18.47 sq. ft./ panel * 30PSF * 3 Panels + 135 lb panel wt = 1797 lbf. That's 1800 lbf total distributed load accross all three solar panels in one array column. Since there will be two support structures per array column that's 900 lbf distributed load per support structure or 4.48 lbf/inch. (Not sure where I got 6.2 on my drawing)
I know I need to determine the reactions at each pin joint, do shear and moment diagrams and then I will do a buckling failure analysis on each support strut member. Any guidance would be appreciated, started doing some calcs on my own and things just weren't coming out right.