Polytite Series

Sectional polycarbonate overhead doors.


Polytite Door Systems are made with triple-walled polycarbonate panels that are strong yet lightweight, providing easy operation with minimum stress on hardware components. The translucent panels provide a naturally-lit, inviting work environment and help reduce winter heating costs through the effects of solar heat gain. The panels are also extremely impact-resistant and can withstand long-term exposure to extreme elements such as sun, wind, rain and snow without cracking or splitting. Particularly suited for service garages but ideal for all types of industrial, agricultural, commercial, institutional and residential overhead door installations where an attractive, light-transmitting, strong, lightweight door is desired.

Specification Sheets

P175 Standard Specification


    Section Details:

  • P175/P175T Section Dimensions

  • Section Thickness 1 3/4″ (45mm)
  • Section Height 21″ & 24″ (533mm & 610mm)
  • Opening Widths

  • Basic Windload: 8′-0″ – 16′-2″ (2438mm – 4877mm)
  • 15 psf Design: 8′-0″ – 24′-2″ (2438mm – 7366mm)
  • Custom Door Width: Up to 30′-2″ (9195mm)
  • Polycarbonate Paneling

  • The external side of the Polycarbonate is protected with a coextruded layer warranting resistance to atmospheric agents and U.V. rays.
  • Thickness: 5/8″ (16mm)
  • Structure: Triple-walled
  • Weight: 0.553lbs/sq ft (2.69 kg/sq m)
  • R-Factor: 2.500 ft2 hF/Btu
  • U-Factor: 2.271 W/m2K
  • Fire Reaction: ASTM E84-01 Flame spread and smoke. Developed: Class A.
  • Solar Heat Gain Coefficient: Clear: 75; Bronze: 57; White: 63
  • Stock Colours: Clear, Dark Bronze, Western Bronze
  • Optional Colours: Green, Blue, White
  • Section Framing

  • Fabricated from 6063-T6 aluminum alloy extrusions, extrusion thickness 0.063″ (1.6mm) thick, and 0.090″ (2.18mm) thick at hardware mounting locations.
  • End stiles: 2 1/2″ (64mm) wide aluminum; Double end stiles for doors over 16′-2″ (4928mm) wide
  • Center stiles: 3″ (76mm) wide aluminum
  • Pair of meeting rails: 4 1/2″ (114mm) high aluminum
  • Top rail: 2 3/16″ (56mm) high aluminum
  • Top rail: 2 9/16″ (65mm) high aluminum
  • Stock Colours: Clear Anodized, Bronze, White
  • Optional Thermatite Multi-Ribbed (MR) Bottom Section (P175T)

  • Insulated sections fabricated from pre-painted, hot dipped galvanized, steel sheet; with rigid polyurethane insulation core, CFC and HCFC free, face sheet stucco embossed and rib reinforced.
  • R-Factor: 16.000 ft2 hF/Btu
  • U-Factor: 0.355 W/m2K
  • Warranty

  • Polytite Panels: 10 years against breakage, excessive yellowing and loss of light transmission
  • Materials and workmanship: 1 year






Standard Polytite Hardware



Full length retainer and bulb weather strip minimize air flow and ensure weather-tightness at the base of your door.


Doors are constructed to withstand wind load specified in ANSI/DASMA 108. Linear style trusses are provided according to door size. Additional trussing can be provided for higher wind load applications.


Roll formed from commercial galvanized steel. Vertical tracks sloped to ensure weather tight seal. Horizontal track curve available in 12″ (305mm) or normally provided 16″ (406mm) radius.

Track Brackets

Bolted type, field adjustable, rib reinforced, stamped from 0.123″ (3.1 mm) thick commercial galvanized steel.


Ten ball bearings provide years of smooth and quiet operation. 7/16″ (11mm) diameter standard stem, long stem on doors over 16’-2″ (4928mm) wide.

Counter Balance

Helically wound torsion springs manufactured from oil tempered spring wire, stress relieved, minimum 10,000 cycles. Aluminum die-cast grooved drums. Flexible 7 x 19 construction aircraft type galvanized cables with 5:1 safety factor. Higher cycle available upon request.

Horizontal Angle

72″ (1829 mm) long or 90″ (2286mm) for 3″ hardware.


Linear type, fabricated from 0.078″ or 0.106″ (2 or 2.7mm) thick zinc plated steel with embossments designed to resist higher load and provide greater stability resulting in improved performance.

Top Roller Carrier

Fabricated from zinc plated steel designed to provide greater stability, field adjustable to ensure weather tight seal.

Roller Brackets

Linear type fabricated from 0.078″ or 0.106″ (2 or 2.7mm) zinc plated steel. Graduated type design to ensure weather tight seal.


1″ (25mm) diameter 0.078″ (2mm) tube or 1/8″ (3mm) wall keyed full length or 1″ (25mm) diameter cold rolled galvanized steel keyed full length.

Head Plates

Full height fabricated from galvanized steel, complete with bolt-on type bearings.


Interior slide bolt type.

Mounting Fasteners

Zinc plated.

Optional Thermatite Bottom Section Hardware

  • Exhaust port: 3″ (76 mm) / 4″ (102mm) / 5″ (127mm) diameter