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Thermacore® Sectional Steel Doors 591

​​​​sectional doors used on building​​​​

​​​​​​​​​​​​​​​​​​​​​​​​​When your project requires a sectional door with an exceptional degree of thermal efficiency, the Thermacore® Sectional Steel Door Model 591 is a proven performer. The Thermacore® steel-polyurethane-steel panel construction provides a thermal barrier that withstands extreme climatic conditions and the most demanding environmental requirements. 

This 1 5/8” (41 mm) thick, heavy duty door fits a wide range of opening sizes and the spectrum of applications — making it the best-selling door system in the Thermacore® line and one of the most-specified insulated sectional doors in the industry. Boasting an R-value of 14.86 (2.63 W/m2), a U-value of .067 (.380 m2/W), and one of the best air infiltration ratings, the Thermacore® 591 will meet or exceed almost any thermally efficient application requirement.

Features
​​​​​Features 

Standard max width
35'2" (10,719 mm)

Standard max height
24'1" (7,341 mm)

Panel thickness
1 5/8" (41 mm)

R-value
14.86 (2.63 W/m2)

U-value
.07 (.38 m2/W)

Air infiltration
at 15 mph (24 kmph) .08 cfm/ft2 (1.46 m3/hr/m2)
at 25 mph (40 kmph) .08 cfm/ft2 (1.46 m3/hr/m2)

Thermal break
PVC

Exterior Steel
.015" (.38 mm) galv.

Exterior Surface
Ribbed, textured

Standard Springs
10,000 cycles

Wind Load
Designs available for usage in high-wind conditions

Warranty
10 year limited delamination
1 year limited on door
3 year/20,000 cycle limited on door & operator system (when purchased together; on material and workmanship)
20 year limited on high performance fluoropolymer coating option

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Door Options
​​Door Options
  • Aluminum sash section available up to 24'2" (7,366 mm) wide
  • Insulated glass, tempered glass, polycarbonate, multi-wall polycarbonate, etc.
  • High performance fluoropolymer coating (Trinar® or equivalent)
  • Four-section pass door
  • High-usage package
  • Wind load options
  • Electric operator
  • Chain hoist
  • Posi-Tension™ drums
  • Safety bottom fixture
  • Bottom-sensing edge
  • Flexible jamb, header seal
  • Exhaust ports ​
  • Window Glazing Options​
Colors
​​Colors

Exterior Color

  • white color swatch White

  • gray color swatch Gray​

  • tan color swatch Tan

  • industrial brown color swatch Industrial Brown​​​

High performance fluoropolymer coating (Trinar® or equivalent) finish option available in white, brown and beige. Offers superior performance.

Actual door color may vary from the digital representation shown here. Color samples are available by request through your Overhead Door Distributor. ​​

Support Documents

​​Engineered for High Thermal Efficiency.
The Thermacore® product line’s unique manufacturing process provides a CFC-free, fully encapsulated, foamed-in place panel which maintains R-value performance year round – and year in and year out. Thermal breaks between internal and external skins, PVC thermal break and joint seal minimize air infiltration and provide one of the highest thermal efficiency ratings in the industry for specified applications.

Strong, Lightweight, Attractive and Durable.
 Thermacore® 591 sectional steel doors feature roll-formed, hot-dipped galvanized steel exterior panels designed for exceptional strength and sound suppression capabilities. Wind load design available for usage in high-wind conditions. Two coats of baked-on, polyester paint on a ribbed, textured exterior surface provide a handsome finish that will last for years. Our industry-leading 10-year limited warranty against delamination means that we’ll stand behind the quality of our doors at the outset and for the long haul.

Superior Field Serviceability.
Thermacore® has a special internal construction which allows hinges to be placed anywhere along the panel’s length permitting customization on the job site — for fast and precise installation, repair or retrofit.

Built With the Best Technology in the Business.
This sectional steel door is manufactured using Overhead Door Corporation’s proprietary, computer-controlled fabrication process. This advanced technology ensures adherence to the industry’s strictest product tolerances and results in an exceptionally well-built door for outstanding thermal efficiency and longlasting performance.

Many Options, Better Solutions.
The Thermacore® sectional steel door model 591 fits openings up to 35'2" (10.7 m) wide and 24'1" (7.3 m) high. A full line of electric operators ensures precise and trouble-free motor operation in a variety of mounting options (side, center or trolley). Available options include aluminum sash section, thermal glazing, pedestrian pass door, Knock & Lock® Breakaway door system, and jamb weatherstripping. Optional high-usage components expand the versatility of the 591 to high-cycle conditions, with torsion springs in 25k, 50k, 75k or 100k cycles, a solid-steel shaft to reduce fatigue and deflection, and a heavy-duty 3" (76 mm) steel track for added durability.