G-5000: Commercial Garage Doors | Knechtel Door Systems


  • Stronger and more energy-efficient insulation

  • Solidly bonded to the steel sheets providing a section that is resistant to flexion.


  • Optimize insulation and reduce seal failures with galvanized steel spacer technology
  • Ensure a long lasting and refined appearance with one-piece molded polypropylene window frame.


  • Sections are strengthened by 2 steel walls joined together with mechanical interlocking joints which are more solid than just two bonded walls.

  • Mechanical thermal breaks which are more efficient compared to thermal breaks made with glue.

  • Triple-contact joints provide 2Watch our video times more weathertightness than those of the competition.


  • Provide stronger fastening for hinges and struts. These 14-gauge plates are 2 times thicker than 20-gauge plates used by other manufacturers.


  • Provide a thermal break that is moreWatch our video effective than steel end caps which form a thermal bridge.

  • Structural elements of the sections, the kiln-dried pine wood end blocks are installed at the outer ends of the section. They are stronger than insulation covered with a steel cap.


  • Provides much better fastening of the end hinges. The lag screws engage 8 threads into the wood, compared to a self-tapping screw going through a steel end cap engaging only about 2 or 3 threads.

High-Pressure injected polyurethane and sealed thermo-pane windows
Joints and metal plates
Wood end blocks and lag screw system

Panel construction - interior view


1 Steel walls

  • 26/26-gauge, G60 hot-dipped galvanized steel with five coats of protective finish.
  • Baked-on polyester paint. Can be repainted.
  • Woodgrain finish on both sides of the door.
  • Same quality of corrosion-resistant steel for interior and exterior faces.

2 Insulated door with high-pressure injected polyurethane foam ensuring a high thermal-resistance rating and the solidity of a composite material.

  • G-5000: 1 3⁄4” (44.5 mm), R-16 (RSI 2.8 or k= 0.357 W/m2K)
  • G-5138: 1 3⁄8” (35 mm), R-12 (RSI 2.1 or k=0.476 W/m2K)
  • G-5200: 2” (50 mm), R-18 (RSI 3.2 or k= 0.313 W/m2K)

3 InterLokTM joints between each section:


  • Mechanical joints ensure stronger sections with walls of each panel mechanically interlocked (not only bonded by the polyurethane).
  • Mechanical thermal break avoids heat transfer between the interior and exterior walls of each section.
  • Triple-contact joint prevents air infiltration.

4 U-shaped tubular bottom weatherstripping made of thermoplastic elastomer (TPE) ensures the weathertightness of the threshold. Remains flexible and watertight during cold weather, to -62°F (-52°C).

5 Wood end blocks made of kiln-dried pine (grade 4). With our lag screw system, ensure better fastening of the end hinges. They also provide a thermal break which prevents thermal bridging.

6 14-gauge steel reinforcement plates placed inside the door for solidly attaching hinges and struts.

Door weight: G-5000: 1.90 lb/pi2 (9.3 kg/m2)
                         G-5138: 1.75 lb/pi2 (8.5 kg/m2)
                         G-5200: 1.95 lb/pi2 (9.5 kg/m2)


Steel colours

The accuracy of colours on the website may vary depending on your screen settings. To see the true colours, please contact your local Garaga dealer for a sample.


 Garage door G-5000 - Grooved



Widths (In 1” (25 mm) increments) : From 4’ to 29’6” (1.2 m to 9 m)
Heights (In 3” (76 mm) increments) : From 6’ to 24’ (1.8 m to 7.3 m)

Widths (In 1” (25 mm) increments) : From 4’ to 18’2” (1.2 m to 5.5 m)
Heights (In 3” (76 mm) increments) : From 6’ to 18’ (1.8 m to 5.5 m)

Widths (In 1” (25 mm) increments) : From 4’ to 24’ (1.2 m to 9 m)
Heights (In 3” (76 mm) increments) : From 6’ to 24’ (1.8 m to 7.3 m)


WindowsStandard Windows
21” x 13” (533 mm x 330 mm)
Glass: see details below
Colours: White, Brown, Claystone, Desert Sand, Black,
Dark Sand and Evergeen.

Oval Windows
Polycarbonate only
26” x 13” (660 mm x 330 mm)
Colour: Black

G-4400 Sections (Full Vision)
Colours: White, Black and Anodized

Thermopane WindowsSingle glass (3 mm)Polycarbonate (3 mm)
Clear, Satin, Wired, Tempered, Laminated or TintedClear, Satin, Tempered or TintedSingle or Thermal (Sealed): Clear or Tinted

Full vision
Single PaneFluted Polycarbonate  Single Polycarbonate  
Clear, Satin, Tempered, Laminated or TintedClear or BronzeClear or Tinted
Sealed WindowsSealed Polycarbonate (thermal)
Clear, Satin, Wired, Glue Chip, Low-e, Tempered, Laminated or TintedClear


Steel tracks:

  • 2" (50 mm), 13-gauge or 14-gauge
  • 3" (76 mm), 12-gauge


 2" Commercial Light Duty2" Commercial Heavy Duty3" Industrial
 Light Duty Heavy Duty Super Heavy Duty
Welded, made of galvanized steel and secured with mounting brackets
2’’ (50 mm), 14-gauge2’’ (50 mm), 13-gauge3’’ (76 mm), 12-gauge
Reinforcement for horizontal tracks
2’’ x 2’’ (50 mm x 50 mm) steel bracket
13-gaugeDoor weight:
- under 650 lb (250 kg) = 13-gauge
- over 650 lb (250 kg) = 8-gauge 1
Door weight:
- under 650 lb (250 kg) = 13-gauge
- over 650 lb (250 kg) = 8-gauge 1
Galvanized steel
Industrial type
With ball bearings
Torsion type
10,000-cycle spring supported by a 1’’ (25 mm) 14-gauge steel tube10,000-cycle spring supported by a 1’’ (25 mm) 2 solid zinc-plated keyway shaft10,000-cycle spring supported by a 1’’ (25 mm) 2 solid zinc-plated keyway shaft
In galvanized steel, installed
on door sections
- From 12’4’’ (3.8 m) to 16’3” (4.9 m): 2 1⁄4” (57 mm), 22-gauge struts
- From 16’4’’ (5 m) and more: 3’’ (76 mm), 22-gauge struts

Hardware options Hardware
Precision end bearing plate 3For 650 lb (250 kg) doors and over, to provide stronger support for the opening system of the door.
Double hingesRecommended for doors 14’ and wider, for a more stable mounting system.
11-gauge hingesFor very wide and very heavy doors,
1 000 lb (453 kg) and over
12-gauge continuous angleProvides stronger attachment of the tracks on the wall.
1 1⁄4” (30 mm) solid shartProvides more strength to the spring system.
Bridge strutEnsures better resistance to wind load.
Safety bottom bracketsFor a safer door system. If the lifting cables break, these brackets stop the fall of
the door.
Tension bridge reinforcementFor very wide doors (18’ 3” wide and over), prevent warping of the steel door sections, meaning the curving of sections which can be caused by indoor and outdoor temperature differences.
Precision rollersMachined steel: recommended for heavy doors and dusty environments.
Black nylon: made of rigid plastic, they reduce the noise of the door in motion.
Rubber: ensure smooth rolling and are recommended to reduce the noise of the door in motion (ideal for condo or apartment). NB-SS: with a stainless stem, ideal for car washes.
C-shaped or bumper springsFor a softer stop, they are recommended for all manually-operated doors with a high-lift track or a full vertical track.
Pusher springsHighly recommended for large size doors with a standard lift with a Jackshaft opener installed beside the door. They ensure the good tautness of the lifting cables when the door is operating.
Chain hoistFor easier closing and opening of a door operated manually.
"Z" or "L“ style track guardsProtect the tracks in high-traffic areas (ex.: forklifts).
High-cycle springsRecommended for intense uses of more then 50 operation cycles per day. Vary from 25,000 to 200,000 cycles.


Built for industrial and commercial use, the G-5000 galvanized steel door provides many benefits. High-pressure injected polyurethane foam ensures an R-16 insulation level, solid construction, and great weatherproofing. The G-5000 is 1¾-in. thick, its 26- gauge metal reproduces the texture of a light wood grain, and horizontal grooves add body to the door. The polyester-based paint (9 colour choices) is baked on, which protects it against corrosion. It’s the favorite of standard doors, because not only does it meet the requirements for various projects, it also sets itself apart from other products in its category by offering far superior insulation. The G-5000 is also available in a version that is 2 inches thick and provides R-18 insulation.


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