The SST-II Bi-Fold Hydraulic System

The One and Only Hydraulically Operated Bi-Fold System

The patented SST-II Hydraulic Bi-Folding System (Patent No. 8,714,229) opens vertically, allowing smooth, quiet access between environments with just the press of a button. By incorporating the SST-II Bi-Folding Door or Window System, the barrier between interior and exterior vanishes, letting the ambience of the outdoors flow in. Design the SST-II into your interior spaces and watch walls disappear, allowing light and motion to easily move throughout.

Why SST-II Bi-Fold Hydraulic?

Hydraulically Operated

The use of hydraulic cylinders eliminates cables, straps, locking mechanisms, pulley’s, springs, etc., offering the cleanest and least obstructive panel face in the market.


The hydraulic system eliminates all pinch points and moving parts typically associated with a cable or strap system.

Remote Power

The power unit may be located anywhere in the building, thereby providing customers with quieter operation, and contributing to a cleaner look.

Easy Installation

The simplicity of the SST-II pre-hung mounting frame means installation is cost-effective and straight-forward.

All Steel Construction

Narrower steel profiles allow for more glass volume and greater visibility.


  • Shipped powder-coat finished. Standard RAL colors in gloss with the option to custom match
  • Manual lowering system in case of power failure
  • Total security without the use of locking mechanisms – The hydraulic cylinders draw the system panels closed with 1,000+ lbs. of force, creating a tight seal around the perimeter
  • Full perimeter weather seals
  • Integral mounting frame to limit loads on the structure
  • Precision welds at all frame joints
  • Heavy-duty bottom rollers are completely captured by the SST-II frame, keeping the system secure at all times
  • No floor track is required – Nothing to impair movement through the opening
  • When open the system forms an awning providing protection from the weather and sun
  • The use of hydraulics eliminates the need for limit switches

Installation Video

Demonstration Video



For additional security or extreme negative wind pressures within the structure, automatic, electrically-actuated locks are available for securing the system panels to the frame.

24v DC Battery Back-Up System

In the event of a power-outage, the system may be manually lowered. We can provide an optional 24v DC battery back-up system.

Motor/Power Unit

The motor/power unit may be located anywhere within the building – Close proximity to the hydraulic door or window is not necessary.


Choose from a standard up/down, 2-button, or key control for system operation. A weather-resistant control is also available. All controls are constant contact.


Infrared photo eyes or a lead-edge sensor are available, to either stop, or stop and reverse the motion of the door or window. Optional warning horn and strobe light indicate system operation.

Remote Operation

Remote Transmitters offer ease of entry upon approach. Transmitters are constant contact. For safety reasons, we require either photo eyes or a lead-edge sensor with remote transmitters.


For turn-key products, we offer our glass retainer system (glass stops) and a variety of dual or single pane glazing options. All factory-supplied glass is laminated for safety. Customers may also elect to provide a virtually unlimited number of inserts such as polycarbonate, steel or wood, to name just a few.


Beyond our standard RAL powder coat finish catalogue, our products may be shipped with a custom-color designed specifically for your project, or manufactured from stainless steel, available for corrosive environments (seaside or pool house installations). Stainless systems may be powder-coated as well.
Color Options


BIM Revit Instructions

360 Degree Interior View