WEATHER SPAN© provides a benchmark architectural design. Our state of the art system of interlocking panels requires no through fasteners eliminating a potential source of roof leak. It covers 18" with a 2" high rib at 9" centers. Available in both Kynar™ and silicone modified polyester paint systems. All galvanized material has G-90 coating and conforms to A.S.T.M. spec. A653-98 SS Grade 40 (40,000 lb. min. yield strength) or galvalume coating conforming to A.S.T.M. A-792-97 SS Grade 40 (40,000 lb. yield strength).