The Model 521 is a sectional aluminum door appropriate for environments where maximum light infiltration and/or visual access is required. Designed to fit openings up to 26’11” (8204 mm) wide and 20’1″ (6121 mm) high, the Model 521 features a wide, 2-11/16″ (68 mm) center stile, 3-3/4″ (95 mm) or 4-1/2″ (114 mm) bottom rail, based on door size.

The Model 511 door is designed in sizes up to 16’2″ (4928 mm) wide and 16’1″ high (4902 mm). Featuring a narrow center stile width of 21/32″ (17 mm), these doors are sleek, attractive and permit maximum visibility. An array of glazing choices, top and bottom rail widths, finishes and special options customizes the 511 to satisfy nearly any project requirement.