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Moduflex® Model 840 Technical Data

Operation Electrically Operated
Panel Configuration & Stacking Continuously-hinged, center stack, straight line runs

Sound Transmission Class (STC) & Appx Panel Weights

  • STC 55 Steel Panels, 11.3 Lbs/Ft2 (55.2 Kg/m2)
  • STC 53 Steel Panels, 9.9 Lbs/Ft2 (48.3 Kg/m2)
  • STC 51 Steel Panels, 9.2 Lb/Ft2 (44.9 Kg/m2)
  • STC 49 Steel Panels, 8.4 Lb/Ft2 (41 Kg/m2)
  • Noise Reduction Coefficient (NRC) Available
  • NRC .80, STC 51 Steel Panels 10.7 Lb/Ft2, (52.2 Kg/m2). Click here for more info
  • Top Seals Sweepseals standard
    Bottom Seals Self-compensating floating bottom seals with 2 1/2" nominal clearance; sweepseals and Autoseals optional
    Final Closure Available with hinged half panel, offset jamb and seal through pocket door closures
    Panel Thickness 4 1/4" (108mm)

    Framing & Substrate

    One-piece seamless steel faces with machine laminated gypsum backers are permanently and invisibly edge-welded directly to 14 gauge steel frames and reinforced with full height protective formed steel framing astragals on both vertical edges of all panels


    Gusseted, welded and reinforced top frame carrier bolt support
    Track & Carriers
  • Type 8 Pre-Programmed heavy-duty white aluminum track with quiet, smooth rolling steel ball bearing carriers with steel wheels
  • Type 5 Pre-Programmed 7 gauge high-yield steel track with smooth rolling radial-type steel ball-bearing wheels
  • Click here for track assembly details
  • Maximum Ceiling Height 22' 3" (6782mm)
    Maximum Opening Width 135' (41148mm) Single opening; 270' (82296mm) Joining opening
    Panel Edges Sheer Look® wrap around panel faces and bronze finish deep nesting universally interlocking panel edges made of steel for extra impact strength and fire resistance
    Surfacing Materials Wide selection of standard vinyls, fabrics, carpets, wood veneers and laminates, or a material of your own
    Fire Ratings
  • Standard non-combustible panel construction with Class "A" flame spread rating. Click here for flame spread test data
  • Eco-Friendly Product Helps projects achieve LEED certification points. Click here for Panelfold's Environmental Sustainability Report
    Pass Doors Single pass doors are of the same thickness and acoustical construction as the panels in which they reside, and may be specified with self-illuminated exit signs, Autoclosers, key locks, push plates, panic hardware and windows
    Pocket Doors 3-Section and Double w/ Slot Closure pocket doors available. Click here for Pocket Doors Technical Brief
    Other Options
  • Full and partial height chalkboard, markerboard, projection and tackable cork work-surfaces
  • Full and partial height windows glazed with Lexan, Plexiglass, or unglazed
  • Joining and intersecting walls
  • Other Information
  • Click here for everything you wanted to hear about sound but were afraid to ask
  • Click here for Track Deflection Allowance data
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