Side folding closure units with glazed G.E. Lexan (or equal) panels incorporated into the curtain design to create a solid security barrier while providing visual access. The panels are 1/8″ thick clear flame-retardant polycarbonate material fitted between continuous vertical interlocking extruded aluminum pivot sections and 5 1/2″ high extruded aluminum closure panels at the top and bottom of the curtain. Vertical hanger rods mounted to rollers that slide in the overhead track support the curtain at every other closure panel. Solid aluminum panel curtains that deny visual access are available.
These open design side folding grilles allow free circulation of air and visual access to the area being protected. The curtain is formed with a series of vertical 5/16″ diameter aluminum tubes on 2″ centers. Horizontal chains formed of eyeletted aluminum links are spaced at 12″ apart. A series of 6″ high extruded aluminum interlocking hinged pivot panels span the top and bottom of the curtain. Vertical hanger rods mounted to rollers that slide in the overhead track support the curtain. For added security, the chains may be specified to be spaced at 9″, 6″ or 3″ apart.