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OVERVIEW
Model 3241 insulated pan ribbed steel doors have a variety of features to meet your design and performance requirements. This line of rugged, heavy-duty commercial garage doors is built to withstand a high volume operation. With our insulated ribbed steel commercial doors, you can count on high performance, everyday reliability, and long lasting durability.
Section Construction:
- 2″ thick pan sections
- 24 gauge steel exterior/vinyl back
- Polystyrene Insulation – R-Value 8.0**
- Ribbed Panel Profile (2 horizontal ribs with alternating “v” grooves)
Size:
- Max standard size 34’2″ wide x 20′ high
Colors/Appearance:
- White, Brown, Sandstone, Gray
- Stock RAL powder-coat option in 188 colors
- Various accessories and options available
**R-Values have been calculated in accordance with ASTM C518 standards
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SECTIONS
SECTION CONSTRUCTION:
- Roll-formed sections are 24-gauge 2″ thick, hot-dipped galvanized with a baked-on polyester finish
- 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
- Panel Profile: 2 horizontal ribs with alternating “V” grooves
Insulation
- 1-1/2” thick CFC free polystyrene
- Vinyl inside cover laminated to polystyrene
- R value 8.00 (R-value Testing is in accordance with ASTM C518 standards)
20-gauge ribbed steel panelRibbed Insulation Detail
Polystyrene Insulation with
Vinyl Backer
Tongue & Groove meeting rails
seal out the elements
Box-shaped stiles provide added
rigidity and section strengthMAXIMUM STANDARD SIZE:
- Max width 24’2” x 16’ high (Contact Factory for larger sizes)
Colors / Finish:

White

Gray

Sandstone

Brown

Optional Colors include RAL powder-coat in 188
Panel Configurations:
- 21″ or 24″ high by width of door


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TRACK
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>>
Low Headroom: Front Mount View>>
Low Headroom: Rear Mount View>>
Vertical Lift View>>
High Lift View>>
Incline View>>
Mounting Options:
- Bracket Mount (leg out), Clip Angle Track, Continuous Angle Track
Bracket Mount View>>
Clip Angle Track View>>
Continuous Angle Track View>>

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
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HARDWARE
Hinges:
- 11-gauge or 14-gauge hinges, as specified
Rollers:
- 2″ or 3″ long-stem or short-stem steel ball bearings rollers
Brackets:
- Top fixtures (min. 12 gauge)
- Bottom fixtures (min. 13 gauge)
Single or Double Edge Endstiles:
.
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OPERATION
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

Above, Torsion/Spring Assembly with Four Spring Layout, Standard Headroom
Operation:
- Manual Operation
- Motor Operation: Trolley or Jackshaft
- Chain Hoist Operation

Jackshaft Operation

Trolley Operation
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LITES
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″ x 12″ (shown is 24″ section height)
24″ x 6″ (shown is 24″ section height)
34″ x 16″ (shown is 24″ section height)
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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.


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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Door Width/Panels Across Chart
Door Height/Panels Across Chart
Track Resources
Standard Lift Doors
Low Headroom: Front Mount
Low Headroom: Rear Mount
High Lift Doors
Vertical Lift Doors
Reverse Angle Track: Leg In (Steel Jambs Shown)
Bracket Mounted Track Angle Mounted Track: Leg out (Wood Jambs Shown)
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