Each system consists of main aluminum rafters with horizontal purlins (as required). The glazing panels rest on a snap-in EPDM gaskets and are secured by extruded aluminum retaining bars on the main spanning rafters.
Horizontal joints are “butt glazed” with high modulus silicon sealants. Exterior fasteners on the retaining bars are covered with mating, snap on caps.
Systems have a system of serrated screw spline, integrated internal weep and drainage, internal purlin to rafter connection (no exposed fasteners), thus better aesthetics.