A New Member Of The LITEC Roof System Family Ennovations by Thomas Richard - February 9, 2019 The QL52 double pitch roof from LITEC is an evolution of their popular QL40A single pitch roof and could be just right for your medium-sized outdoor events. Thanks to its double pitch construction, and use of QL52A load-bearing truss with fork connections, it looks great and provides stability you can count on,