Overview
                        ConceptFolding 77
ConceptFolding 77 provides exceptional element sizes for maximal transparency and stunning aesthetics. Nature and indoors come closer together as the aluminium folding door system connects up to eight vents to draw the exterior inside.
- High-quality folding doors
 - Best in class element sizes
 - From 2 to 8 vents, opening any way you want
 
 Technical information
                        Performance
Comfort
Comfort
            Air tightness:
            
          Class 4 (600Pa)
            Water tightness:
            
        Class 9A (600Pa)
            Wind load resistance:
            
          Class C3 (1200Pa)
            Acoustics - Rw(C;Ctr):
            
        45(-1;-5) dB
Durability
Durability
            Class:
            
        3 (20000 cycles)
Properties
Max. Dimensions & Weight
            Min. height of vent:
            
          600 mm
            Max. height of vent:
            
          3000 mm
            Min. width of vent:
            
        400 mm
            Max. width of vent:
            
          1200 mm
            Max. weight of vent:
            
        120 kg
Sightlines
            Min. width meeting section:
            
          122 mm
            Min. width transom profile:
            
          48 mm
            Min. height threshold:
            
        5 mm
Depth & Glazing
            Depth frame:
            
          77 mm
            Depth Vent:
            
          77 mm
            Depth frame-vent:
            
        77 mm
            Rebate height:
            
          25 mm
            Glazing method:
            
          Dry glazing / Siliconized glazing / Internal glazing
            Min. glass thickness - vent:
            
          6 mm
            Max. glass thickness - vent:
            
        63 mm