The "3020" series, thermally broken / non-thermally broken is dry-dry, outside glazed, able to accommodate double glass units 25.4 mm / 1",  The nominal profile dimensions are 50.8 mm / 2" wide and 80 mm / 3-1/8" deep appropriate for load and span conditions. Glass retention is achieved by flush glazing with extruded aluminum exterior glazing stop for dry-dry gasketing method.

 3020 Series DG 51mm x 80mm(2"x3-1/8")

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