"The UPM mounts from General Specialties are the best I have used on my personal system. They are a little heavier duty construction than other racks and may cost a little more to ship but stand up to heavy wind and snow loading once installed. We have customers in hurricane and tornado country and these racks hold precious solar panels securely with no issues.

I personally have measured 86MPH where my UPM-10X rack and Solarworld panels are installed and there was no problem at all.  I have a customer in the Cascade mountains who saw 120+MPH on his two UPM 8X racks and although there was other damage around his place the racks and panels were secure. They are easy to assemble and the construction is top notch. Fit and finish is always spot on and the holes used to mount the panels are always drilled correctly to match the mounting holes in the solar panels. They are easy to adjust for seasonal tilt and stay where you put them once adjusted. I highly recommend these racks."