Sonafold Acoustic Folding Door

Steel acoustic folding door. The flat-faced robust construction renders it capable of withstanding severe wind conditions.

Features and benefits:

• Door panels: constructed from 2 mm-thick, double-skin steel sheets, infilled with high-density rockwool. The door panels are 54 mm thick and are flush in appearance.
• Seals: high-quality ethylene propylene diene monomer (EPDM) seals are fitted in-between the panels and at the jambs. Brush seals are fitted at the top and bottom.
• Top track: galvanized steel rolled section, forming a box-type track on which pulleys run, mounted on the top of the door panels. A branch track is incorporated to allow the door to stack correctly. Brass rollers connected to the bottom hinges run on a steel channel bottom track, which is set for alignment within a 200 x 75 mm chase, before finally being grouted into position.
• Bottom track: a galvanized steel bottom track is recessed into the floor, and acts as a guide.
• Door arrangements: pairs of panels make up each door or half door (between two and ten on each side). The door is face-fixed to the inside, and the panels stack at 90° to the opening when open.
• Operation: electrical operation is via a three-phase geared motor, mounted on the top track at one or both ends. Push-button controls are provided at low level, and emergency manual operation is via hand chain, which is connected and disconnected at low level.