Bolton Gate Company - Acoustic Products - Sonafold Folding Doors

Acoustic Rating

When independently tested, the door achieved a weighted sound reduction index Rw of 28 dB.

Door Panels

Constructed from double skin steel sheets 2mm thick infilled with high density rockwool. The door panels are 54mm thick and are flush in appearance.

Seals

High quality EPDM seals are fitted in between the panels and at the jambs. Brush seals are fitted at the top and bottom.

Top Track

Galvanised steel rolled section forming a box-type track in which pulleys mounted on the top of the door panels run. A branch track is incorporated to allow the door to stack correctly.

Bottom Track

A galvanised 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 each side). The door is face fixed to the inside and the panels stack at 90 degrees to the opening when open.

Finish

Galvanised as standard. Polyester powder coating to a range of standard RAL colours is available at extra cost.

Weight

The doors weigh approximately 55 kgs per m2.

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.

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