aluminum-door-system-model-521

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

Clear-(standard)

Clear (standard)

Light-Bronze

Light Bronze

Medium-Bronze

Medium Bronze

Dark-Bronze

Dark Bronze

Wood Grain Powder Coat Finishes

Knotty-Pine

Knotty Pine

Cherry

Cherry

Cherry-with-Flame

Cherry with Flame

Dark-Walnut

Dark Walnut

Powder coat finishes

Select from approximately 200 RAL powder coat color options to best match your home.

color-options

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.

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