ABSTRACT
Solar thermal collectors and PV modules have to be securely mounted to the building or on the ground. They need to meet the regional wind requirements. There are many different types of racking profiles and mounting options depending on the roof pitch and type of roofing product. Rails should be mounted to racking systems that will last at least 25 years, matching the life of the collector. The roofing material should also be new and be able to last 25 years without replacement. All penetrations through a roof need to be sealed and anchorage must be to structural elements. If multiple sets of racks are installed, the designer must pay attention to the location of other equipment on the roof and space the racks so no shading occurs. Thought should be given to the appearance of the equipment and how it can be integrated with the building's design and functionality (i.e., PV could provide shading for rooftop mechanical equipment or for parking lots) as well as keeping it close to the inverter or storage tank. There are lot of photos of different types of racked systems.
