Built a large shade structure in our yard. Needed non-warping rafters to run tracks on. Permacorp offered size & color options & asked helpful questions to confirm our specs. Angles, flanges, end caps all made just right. Friendly, professional staff. Aluminum may be more expensive than wood, but we will be sitting on our patio sipping cool drinks for the next few decades while the neighbors are out staining and maintaining their wooden structures. Would recommend for all aluminum projects.