Overhead Door- Aluminum Door Systems Model 521
Overhead Door- Aluminum Door Systems Model 521 – is perfect 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” (6121 mm) high, the 521 Model features a wide, 2 11/16” (68 mm) center stile, a 2 3/8” (60 mm) or 3 3/4” (95 mm) top rail, and 3 3/4” (95 mm) or 4 1/2” (114 mm) bottom rail. A variety of glazing choices, finishes and special options are available.
- Section thickness – 1 ¾” (45 mm)
- Maximum standard height – 20’1″ (6121 mm)
- Maximum standard width 26’2″ (7976 mm)
- Material Extruded 6061-T6 aluminum
- Standard finish – 204R-1 clear anodized (painted white at no charge)
- Center stile width – 2 11/16″ (68 mm)
- End stile width – 3 5/16″ (85 mm)
- Top rail width – 2 3/8″ (60 mm) or 3 ¾” (95 mm)
- Top intermediate rail width – 2 1/8″ (54 mm)
- Bottom intermediate rail width – 1 19/32″ (40 mm)
- Bottom rail width – 3 ¾” (95 mm) or 4 ½” (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
- Warranty – 1-Year Limited; 3-Year Limited on powder coat finish
- Glazing options
- 1⁄8″ (3 mm) DSB;
- 1⁄8″ (3 mm) or 1⁄4″
- (6 mm) acrylic
- 1⁄8″ (3 mm) or 1⁄4″ (6 mm) tempered
- 1⁄8″ (3 mm) or 1⁄4″ (6 mm) clear polycarbonate
- 1/4″ (6mm) and 3/8″ twin-wall polycarbonate, 5/8″ triplewall polycarbonate
- 1/4″ (6 mm) 3/8″ (10 mm) and 5/8″ (16 mm) twin-wall
polycarbonate, triple-wall polycarbonate 1⁄4″ (6 mm) wire glass - 1⁄2″ (12 mm) insulated glass
- Electric operator or chain hoist
- Bottom sensing edge
- 3″ track
- Bracket mounting (not available on full vertical door tracks)
- Higher-cycle springs in 25k, 50k, 75k, 100k cycles
- Exhaust ports
- Four-section pass door
- Wind load and impact rated door available
- Posi-tension drums
- Bronze anodization
- Powder coat finish
- Pass door
ANODIZED FINISHES
Medium Bronze
Medium Bronze
Wood Grain Powder Coat Finishes
Knotty Pine
Cherry
Cherry with Flame
Dark Walnut
Powder coat finishes
Select from approximately 200 RAL powder coat color options to best match your home.
Actual door colors may vary from brochure photos due to fluctuations in the printing process. Always request a color sample from your Overhead Door™ Distributor for accurate color matching.