3285: Micro-Grooved Polystyrene Sandwich

Polystyrene Insulated Sandwich, 26 gauge

Designed to enhance appearances in a variety of applications, this insulated commercial garage door will complement the look of an array of commercial applications.


The Model 3285 has four evenly spaced micro-grooves that run horizontally across each section and incorporates a tongue-and-groove joint between each section that gives the door an even, symmetrical appearance. The durability and insulating value of this double-sided, polystyrene, core-insulated steel door combined with its feature-rich design options, makes this door a popular complement for many building designs.

Section Construction
  • 2" Thick Sections
  • 26 gauge commercial quality steel
  • Polystyrene Insulation - R-Value 10.29**
  • Four evenly spaced micro-grooves run horizontally across each section
  • Max standard size 28’2” wide x 20’ high
Colors / Appearance
  • White, Almond, Sandstone or Brown
  • Stock RAL powder-coat option in 188 colors
  • Accents Logos is available as an option for interior and exterior applications
  • Accents Planks is available as an option in cedar, mahogany, light oak and dark oak
  • Various accessories and options available.

**R-Values have been calculated in accordance with ASTM C518 standards

Warranty >>


  • Features four evenly spaced micro-grooves that run horizontally across each section
  • 26-gauge commercial quality steel exterior skin with 27 gauge steel interior
  • Tongue-and-Groove section joints
  • Concealed steel back-up plates run from top to bottom of each section for secure hardware attachment
  • White painted end stiles
  • Bottom "U" type astragal is a standard feature


  • Polystyrene core secured in place with a urethane adhesive to increase structural integrity
  • R value 10.29 (R-value Testing is in accordance with ASTM C518 standards)
Microgrooved Steel Closeup
26-gauge steel exterior with horizontal micro-grooves
  • Max width 28’2” x 20’ high

Colors / Finish:




Optional Colors include RAL powder-coat in 188
Panel Configurations:
  • 18", 21" or 24" high by width of door
Panel Configuration 1
Panel Configuration 2
  • Complete the look of your door with the color and style of Accents.
  • Accents Logos is available as an option for interior and exterior applications
  • Accents Planks is available as an option in cedar, mahogany, light oak and dark oak
Commercial Accents 1
Commercial Accents 1


Track Configuration:
  • Tracks are 2' or 3', as specified
  • 12" radius, 15" radius
  • Normal Headroom, Low Headroom, Vertical Lift, High Lift, Incline
  • 20" & 32" radius (2" track & up to 10' high doors only)
Normal Headroom / Standard Lift View >>

Normal Headroom / Standard Lift Image
Low Headroom: Front Mount View >>

Low Headroom Image
Low Headroom: Rear Mount View >>

Low Headroom Image
Vertical Lift View >>

Vertical Lift Image
High Lift View >>

High Lift Image
Incline View >>

Incline Lift Image
Mounting Options:
  • Bracket Mount (leg out), Clip Angle Track, Continuous Angle Track
Bracket Mount View >>

Bracket Mount Image

Clip Angle Track View >>

Clip Mount Image

Continuous Angle Track View >>

Continuous Mount Image

Reverse Angle Mount View >>
Available for Clip Angle & Continuous Angle Track

Reverse Angle Mount Image
Track Gauge:
  • 2" Tracks - up to 8'-0" high = 17 gauge roll-formed galvanized steel
  • 2" Tracks - 8'-0" 10'-0" = 16 gauge
  • 2" Tracks - over 10'-0" = 14 gauge
  • 3" Tracks - 12 gauge


Counterbalance System (Springs)
  • Oil tempered torsion springs are mounted on a cross-header shaft supported by galvanized steel ball breaking end plates and center bracket(s)
  • Springs are calculated for exact door weight, size and trajectory in accordance with ANSI 102 standards for a minimum of 10,000 cycles
    NOTE: May be specified for higher cycles when available
  • Counterbalance is transferred through galvanized aircraft quality cables secured to bottom of the door
Torsion Spring Assembly Image
Above, Torsion/Spring Assembly with Four Spring Layout, Standard Headroom

  • Manual Operation
  • Motor Operation: Trolley or Jackshaft
  • Chain Hoist Operation
Jackshaft Image
Jackshaft Operation
Trolley Operation Image
Trolley Operation


  • 11-gauge or 14-gauge hinges, as specified
Double End Hinges

  • 2" or 3" long-stem or short-stem steel ball bearings rollers

  • Top fixtures (min. 12 gauge)
  • Bottom fixtures (min. 13 gauge)
Bottom Fixture

Single or Double Edge Endstiles:

Double Hinge Endstiles


Optional Lites / Windows
  • 24" x 6", 24" x 12", or 34"x 16" lites with 1" insulated glass (Clear, Tempered or Tinted)
  • Optional Aluminum Full View Frame to match size and panel layout of steel section
    (Optional open for field glazing, 1/8" DSB, 1/8" polycarbonate, 1/8" tempered glass, 1/4" tempered glass, 1/2" insulated glass or 1/2" tempered insulated)
  • Special glass options available. Contact factory for details.
24 24x12
24" x 12" (shown is 24" section height)
24 24x6
24" x 6" (shown is 24" section height)
34 34x16
34" x 16" (shown is 24" section height)
Full View Lite Full View
Full View Aluminum Frame

Optional Accessories

Doors are available with a variety of Specialty Options for specific installation needs. Contact Factory for additional options.

Swing-Up Sectional Post

A perfect answer for openings that are too large for a single overhead door that must accommodate large machinery or equipment on an infrequent basis. Operating on a single pivot point that is designed to swing left or right, it allows the use of one (1) smaller door for everyday requirements and the full opening when needed. See video.

Swing Up Sectional Post

Pass Doors

Whether it's for convenience or necessity, there are circumstances where a pass-through door is requested to provide ingress and egress in an overhead door enclosed opening without having to open the overhead door. C.H.I. can accommodate this need with a state-of-the-art design pass-door option. Available in our urethane core models 3216 and 3212, it’s the ideal choice to solve this need.

Pass Door Closed Pass Door Open
Header & Jamb Seals

Seal the perimeter of the opening to provide additional air infiltration and thermal protection.

Top Seal

Certified Windload

Wind can be unpredictable and destructive. This is why C.H.I. Windbreaker Series and iSeries doors are designed, tested, and built to the most rugged specifications. Wind chamber tested to ensure windload resistance, these extra-sturdy designs provide enhanced defense against the elements.

C.H.I. Overhead Doors developed the resilient Windbreaker Series garage doors to protect against high wind conditions. The super-resilient C.H.I. iSeries Impact Approved doors have strength designed to withstand direct collision of projectiles and other windborne debris at high speeds.

Impact Approved WindBreaker Series

Additional Windload Information:
Navigating the complex windload codes and compliances can be a daunting task. C.H.I. sales associated and distributors are able to help you understand the specific codes governing your geographic area. For additional information, these websites offer a great deal of information.


Technical Data Sheets:
  • TDS #168 - Wind Loads on Garage Doors - FAQ
  • TDS #177 - Application of Kd Factor To Garage Door Wind Load Determination Using ASCE 7
  • TDS #178 -Garage Door Wind Load Determination - Effective Wind Area
  • TDS #180 - Wind Load Ratings for Non-Tested Garage Door and Rolling Door Sizes
  • TDS #181 -General Code Inspection Guidelines For Wind Load Rated Garage Doors
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