Insulated Ribbed Steel Door Series – Model 3221

Insulated Ribbed Steel Door Series – Model 3221

Loading or unloading trucks, this garage door performs as expected. With polystyrene insulation, 20 gauge and vinyl interior, it was built for high volume of operations so you can count on it’s everyday reliability.


  • 2 inch thick panel sections
  • 20 gauge steel exterior
  • vinyl back
  • Box shaped stiles are riveted to the face of the section and are galvanized for additional corrosion protection
  • Tongue and groove meeting rails provide superior rail strength and weather resistance
  • 2″ or 3″ long-stem or short-stem steel ball bearings rollers
  • Polystyrene Insulation with 8.0 r-value**
20-gauge ribbed steel panel
20-gauge ribbed steel panel
Polystyrene Insulation with
Vinyl Backer
Polystyrene Insulation with Vinyl Backer
Tongue & Groove meeting rails
seal out the elements
Tongue & Groove meeting rails seal out the elements
Box-shaped stiles provide added
rigidity and section strength
Box-shaped stiles provide added rigidity and section strength


24 ft 2 in wide X 16 ft high

Primary Color:

White white_color

*Secondary Color Options:

Stock RAL powder-coat option in 188 colors

Track Configuration Options:

  • Tracks are 2′ or 3′, as specified
  • 12″ radius, 15″ radius
  • 20″ & 32″ radius (2″ track & up to 10′ high doors only)
Standard Lift
standard lift
Low Headroom, Front Mount
low headroom
Low Headroom, Rear Mount
Low Headroom, Rear Mount
Vertical Lift
vertical lift
High Lift
High Lift
Incline Lift
Incline Lift

Mounting Options:

Bracket Mount
Bracket Mount
Clip Angle Track
Clip Angle Track
Continuous Angle Track
Continuous Angle Track
Reverse Angle Mount
Reverse Angle Mount


11-gauge or 14-gauge hinges, as specified
Single or Double Edge End Stiles:
Single or Double Edge Endstiles


Top fixtures (min. 12 gauge), Bottom fixtures (min. 13 gauge)


  • Oil tempered torsion springs are mounted on a cross-header shaft
  • Springs are calculated in accordance with ANSI 102 standards
  • Counterbalance is transferred through galvanized cables
Spring Operation
Torsion/Spring Assembly with Four Spring Layout, Standard Headroom
Torsion/Spring Assembly with Four Spring Layout


Manual Operation, Trolley, Jackshaft or Chain Hoist Operation


Window Options:

  • 24″ x 6″, 24″ x 12″, or 34″x 16″ windows with 1″ insulated glass
  • Optional Aluminum Full View Frame
    (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)
24″ x 12″ window size
24" x 12" window size
 24″ x 6″ window size
24" x 6" window size
 34″ x 16″ window size
34" x 16" window size
 Full View
full view windows

Optional Swing-up Sectional Post:

For openings that are too large and must accommodate for partial entrances, single pivot swing-up sectionals allow for ease of access, while full opening can be used when needed.
Swing-up Sectional Post

Optional Pass Doors:

Whether is is for convenience or necessity, a pass-through door opening may be used without having to open the overhead door.
Pass Doors

Optional Header & Jamb Seals

An optional seal provides additional air infiltration and thermal efficiency protection.
Header & Jamb Seals

Certified Windload:

This door is designed, built and tested for wind-load resistance defense against high wind and debris conditions.
iserieswindbreaker series

Satisfaction Guaranteed:

Houston Garage Door and Gates Satisfaction Guaranteed

Count on us to get the job completed on-time and on a budget. We inspect, maneuver, mantle and dismantle, transport, install, fix and complete all our garage door projects. We fix the competitor’s mistakes. We guarantee all our work.


We’re proud to hold up one of the strongest warranty package in the greater Houston area. All our warranty packages included on all hardware and labor. Call for details.


online quote available.

Manufactured by:

CHI Overhead Doors.

*This option may not be available. Call for details.
**R-Values have been calculated in accordance with ASTM C518 standards