CS 77

CS 77

Concept System 77 door

Optimized safety and comfort

Concept System® 77 includes a high-quality flush door system, which meets the elevated requirements regarding thermal insulation, stability, and security.
With regard to security, different door variants are specially designed and tested for burglar resistance, fire resistance, bulletproof, and solutions for panic situations, meeting the most severe European standards.

This standard flush door range is available in all inward and outward opening types, realized with a wide range of door locks to meet every kind of locking demand.
Moreover, CS 77 flush doors are offered with different threshold solutions to perfectly match all comfort and aesthetic requirements. To ensure the tightness of the door, specially designed insulation strips are used to avoid possible bending of the element, caused by the temperature difference between the in- and outside of the building.


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Technical information


Min. Visible width frame: inward opening2 11/16 in. 
Min. Visible width vent: inward opening3 in. 
Min. Visible width frame-vent: inward opening5 7/8 in. 
Min. Visible width frame: outward opening1 5/8 in. 
Min. Visible width frame-vent: outward opening5 7/8 in. 
Min. Visible width T-profile3 in. 
Max. height vent118 1/8 in. 
Max. width vent55 1/8 in. 
Max. weight element550 lbs 
Overall system depth frame2 11/16 in. 
Overall system depth vent2 11/16 in. 
Rebate height1 in. 
Min. Glass thickness3/16 in. 
Max. Glass thickness2 1/16 in. 
Min. Glass thickness vent3/16 in. 
Max. Glass thickness vent2 1/16 in. 


Air tightness max. test pressure0.02 cfm/ft²
Water tightness2 psf
Design pressure15
Acoustic performance STC (ASTM E90-09/1332)39
Acoustic performance OITC (ASTM E90-09/1332)36
AAMA RatingClass R
PG Rating15
Burglar resistance (EN)RC2/WK2
Thermal insulation Uw - Double0.3 Btu/hr∙ft²∙°F
Thermal insulation Uw - Triple0.25 Btu/hr∙ft²∙°F

Opening elements

  • Inward Opening Single DoorInward Opening Single Door
  • Inward Opening Double DoorInward Opening Double Door
  • Inward Opening Double ZT DoorInward Opening Double ZT Door
  • Outward Opening Single DoorOutward Opening Single Door
  • Outward Opening Double DoorOutward Opening Double Door
  • Outward Opening Double ZT DoorOutward Opening Double ZT Door
  • Inward Opening Pivot DoorInward Opening Pivot Door
  • Outward Opening Pivot DoorOutward Opening Pivot Door
  • Automatic Sliding DoorAutomatic Sliding Door
  • Inward Opening Double Window DoorInward Opening Double Window Door
  • Inward Opening Single Window DoorInward Opening Single Window Door
  • Outward Opening Double Window DoorOutward Opening Double Window Door
  • Outward Opening Single Window DoorOutward Opening Single Window Door
  • HID Double Inward Opening DoorHID Double Inward Opening Door
  • HID Double Outward Opening DoorHID Double Outward Opening Door
  • HID Single Inward Opening DoorHID Single Inward Opening Door
  • HID Single Outward Opening DoorHID Single Outward Opening Door
  • Panic Double DoorPanic Double Door
  • Panic Single DoorPanic Single Door