Structures Unlimited is a premier, single-source manufacturer that provides structural skylights, skyroofs, canopies, and walkways. Their unique, pre-engineered box beam system can span areas in excess of 100 feet while providing a clean, finished appearance that is virtually maintenance-free, energy-efficient and highly corrosion-resistant. Their structural system, combined with Kalwall® translucent sandwich panels, forms a total building system that is ideal for LEED projects and can stand up to hurricane-force winds and massive snow loads.