Sectional Steel Door Model 426 Model 426

Sectional Steel Door Model 426 Model 426

Sectional steel door model 426 is ideal for heavy-duty applications requiring protection against the elements. These doors feature a 2" (51 mm) panel thickness, 16-gauge steel intermediate and end stiles, ribbed steel exterior and 26-gauge steel back cover. Polystyrene insulation provides a U-factor of 0.32 (R-value of 7.35). The Model 426 is a 24-gauge door available in sizes up to 28´2" (8585 mm) in width and 24´1" (7341 mm) in height and is offered in white or industrial brown. A multitude of options including reinforcing struts, movable center posts, and motor operation allow these insulated heavy-duty doors to be used in a variety of commercial and industrial environments.

Product Name Product Model Request Drawing
Insulated Sectional Steel Door Model 426 Add Product

Construction

Product Specifications 
Standard Max Width28'2" (8585 mm)
Standard Max Height24'1" (7341 mm)
Nominal thickness2" (51 mm)
InsulationExpanded polystyrene
U-factor*0.32
R-value7.35 (1.29 W/Msq)
Exterior steel24-gauge galvanized steel
Exterior surfaceRibbed
End stiles16-gauge steel
Center stiles16-gauge steel
Interior colorWhite
Back cover26-gauge galvanized steel (poly-bonded laminate, high impact polystyrene (HIPS) backed optional)
Standard mountingAngle mount
Standard track2" (51 mm)
Standard springs10,000 cycle
Weather StrippingStandard on bottom
OperationManual pull rope or electric operator
FinishWhite or Industrial Brown baked-on polyester
LockInterior mounted slide lock
Wind LoadFBC approved wind load options available
*U-Factors are based on independent testing and verified per ANSI/DASMA 105. For products other than aluminum full-view doors, testing was conducted on specific sizes of solid doors. Actual thermal performance may vary by door size and configuration.
Overhead Door Corporation uses a calculated door section R-value for our insulated doors.

Warranty

  • 1-year limited

  • Ribbed Panel

  • white color swatch

    White

  • industrial brown color swatch

    Industrial Brown

Actual door color may vary slightly from the digital representation above.

  • Chain Hoist or Electric Operator is recommended for doors above 10’ tall or more than 400 pounds
  • Bottom sensing edge
  • Full sash section with 1/8" (3 mm) DSB, insulated; 1/8" (3 mm) and 1/4" (6 mm) acrylic
  • Individual lites with 1/2" (13 mm) DSB
  • 3" (76 mm) track
  • Bracket mounting (not available on full vertical door tracks)
  • Higher-cycle springs in 25k, 50k, 75k, 100k cycles
  • Exhaust ports
  • Jamb weather seals
  • Bottom strips; including: looped PVC weatherstrips, flexible PVC astragal weatherstrips, and double-contact weatherstrips
  • Reinforcing struts of roll-formed, galvanized steel
  • Movable center posts for 2" (51 mm) or 3" (76 mm) tracks that roll away, with automatic safety catches that prevent door closure when posts are removed
  • Tumbler keyed lock
  • Window Glazing Options 
  • Warehouse Package – Quick install system available
  • Impact Section Available