Model 599

With an R-value of 17.5 (3.09 W/m2) a U-value of .057 (.324 m2/W), and one of the best overall air infiltration ratings in the industry, the Thermacore® Sectional Steel Door Model 599 is one of the most thermally efficient door systems in its class. The Model 599 doors also carry a Class 26 sound transmission rating for applications where sound suppression is desirable.

The Thermacore® line features steel-polyurethane-steel panel construction which provides a thermal barrier that withstands extremely hot or cold climates and the most demanding environmental requirements.


Standard max width

40’2″ (12,243 mm)

Standard max height

32’1″ (9,779 mm)

Panel thickness

2″ (51 mm)


17.5 (3.09 W/m2)


.057 (.327 m2/W)

Sound Transmission Class 26

Ideal for applications that require sound control

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


Exterior Steel

.015″ (.38 mm) galv.

Exterior Surface

Flush, textured

Standard Springs

10,000 cycles

Wind Load

Designs available for usage in high-wind conditions


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

Door Options

  • Aluminum sash section available up to 24’2″ (7,366 mm) wide
  • Insulated glass, tempered glass, polycarbonate, multi-wall polycarbonate, etc.
  • 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
  • Impact Section Available


Exterior Color

  • White

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


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