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The 591 Series


The 591 Series is the best-selling door in the Thermacore line, and offers superior thermal efficiency to fit a broad range of applications. The 591 Series exterior skin is constructed of galvanized steel with a ribbed, textured finish. It is available with a white interior finish and either a white or Industrial Brown exterior.

  • Thermal glazing
  • Four-section pass door
  • High-usage components*
  • Electric operator
  • Chain hoist
  • Posi-Tension drums
  • Safety bottom fixture
  • Bottom-sensing edge
  • EPDM rubber header seal
  • Aluminum sash section available to 22'2" (6,756 mm) wide
  • Exhaust ports
Standard Features At a Glance

Panel thickness

1 5/8" (41 mm)


14.86 (2.63 W/Msq)


.067 (.380 Msq/W)

Air infiltration

at 15 mph (24 kmph).08 cfm (2.26 Lpm)
at 25 mph (40 kmph).08 cfm (2.26 Lpm)

Thermal break



Meets ANSI/DASMA 102-1996

Exterior steel

.016" (.41 mm) galv.

Exterior surface

Ribbed, textured

Standard springs

10,000 cycle

Std. max. width

35'2" (10,719 mm)

Std. max. height

24'1" (7,341 mm)

Exterior color


Interior color


Limited warranty

10-year delamination

For more details on Steel Sectional doors call today 1-630-350-7667 or fill out our contact form.
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