The 521 Series is a sectional aluminum door appropriate for environments where maximum light infiltration and/or visual access is required. Designed to fit openings up to 26’2″ (7976 mm) wide and 20’1″ (6121mm) high, the 521 Series features a wide, 2-3/4″ (70mm) center stile, 3-3/4″ (95mm) or 4-1/2″ (114mm) bottom rail, based on door size.
Section thickness
1 3/4″ (45 mm)
Maximum standard width
26’2″ (7976 mm)
Maximum standard height
20’1″ (6121 mm)
Material
6063-T6 aluminum
Standard finish
204R-1 clear anodized (painted white at no charge)
Center stile width
2.712″ (69 mm)
End stile width
3.350″ (85 mm)
Top rail width
2 3/8″ (60 mm) or3 3/4″ (95 mm)
Top intermediate rail width
2 1/8″ (54 mm)
Bottom intermediate rail width
1 19/32″ (40 mm)
Bottom rail width
3 3/4″ (95 mm) or 4 1/2″ (114 mm)
Weatherseals
Bottom, flexible PVC
Standard springs
10,000 cycle
Track
2″ (51 mm)
Mounting
Angle
Operation
Manual pull rope
Hinges and fixtures
Galvanized steel
Lock
Galvanized,interior-mounted single unit
