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Aluminum Glass Door Model 521 

aluminum garage doors

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.

Door Options

  • 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 cycle
  • Exhaust ports
  • Four-section pass door
  • Finish options:
    - Bronze anodized
    - Select from 197 standard powder coat colors or colored to match specification
  • 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” (6 mm) and 3/8” (10 mm) multi-wall polycarbonate
    - 1⁄4" (6 mm) wire glass
    - 1⁄2" (12 mm) insulated glass

Features

Section thickness
1 3/4" (45 mm)

Max. standard width
26'11" (8204 mm))

Max. 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 11/16" (68 mm)

End stile width
3 5/16" (84 mm)

Top rail width
2 3/8" (60 mm) or 3 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

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