Profile: Gammans Skylight Systems designs, manufactures and installs skylight systems. Our Tru-Arc barrel vault framing systems provide a true curved sight line replacing the traditional segmented barrel vault design. Tru-Arc barrel vaults utilize an innovative new hybrid system that combines the visual aesthetics and structural integrity of a true radius frame with the cost effectiveness and quality of flat glass. Our brands include Tru-Arc™, Lite-Rail™, Sol-Area™ and 3Dsky™.