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Rockwool Fire Barrier

Rockwool Fire Barrier

Rockwool Fire Barrier
Fixing Instructions

ROCKWOOL FIRE BARRIER

FIRE CAVITY BARRIER FOR ROOF VOIDS, LOFT AREAS
AND SUSPENDED CEILING VOIDS

 
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INSULATION & INTEGRITY FIRE CAVITY BARRIER

A versatile, flexible curtain which provides an insulation, smoke and fire cavity barrier. It consists of a rock mineral wool reinforced fleece which is stretched between perimeter fixings and wire stitch jointed for maximum effectiveness.

Rockwool Fire Barrier is 50mm thick and supplied in a roll size 4000mm x 1000m. Rockwool Fire Barrier can be used as a half hour fire and cavity barrier in a single 50mm blanket or up to one and a half hours when two 50mm blankets are used together.

Rockwool Fire Barrier has been tested or conforms to the following standards:

BS 476: Part 4, 1970 Non Combustibility or Building Materials
BS 476: Part 6, 1989 Fire Propagation of Building Materials
BS 476: Part 7, 1987 Surface Spread of Flame
BS 476: Part 22, 1987 Fire Test for Building Materials in Non Load bearing Elements of Construction.

Rockwool Fire Barrier

The half-hour cavity barrier was tested to BS 476: Part 22 at Warrington Fire Research Centre in 1987 (Report NO. WARRES 41584). The test showed a 62 minutes stability and integrity before being discontinued, and 20 minutes insulation.

 

Versatile Tested to BS476, Part 22 Easy to handle Simple to fix

The one-hour cavity barrier was tested to BS 476: Part 22 at Warrington Fire Research Centre in 1989 (Report No. WARRES 46351). This test showed 105 minutes stability and integrity before being discontinued, and 90 minutes insulation.

Rockwool Fire Barrier can be supplied with aluminium foil facing on one or both sides, to provide excellent smoke barrier characteristics and improved acoustic attenuation properties. When used as a cavity barrier the minimum provisions when tested to the relevant part of BS 476 are 30 minutes integrity and 15 minutes insulation with each side tested separately.

ACOUSTIC PERFORMANCE
(Room to noise reduction)

All values are estimated, based on total system integrity. Typical wet felt ceiling tile in lay-in-grid system - 30dB. As above + 50mm thick Rockwool Fire Barrier vertically hung from the soffit leaving no gaps and with 150mm overlap on top of ceiling - 43dB. Installed as 2, but faced with foil on one side - 45dB. 2 independently hung barriers with foil facing - 50dB.

STRUCTURAL STABILITY

The fire barrier must be hung from structural framework which can resist fire for the same period as the fire barrier system itself. It is very important to continuously support and thoroughly clamp the top edge of the fire barrier to the structural members in preference to the roof decking.

 

TYPICAL SPECIFICATION


Fire Resistance to BS 476, Part 22 Integrity/Insulation 30 minutes, 60 minutes or 90 minutes.

Unless shown otherwise install barriers to subdivide the ceiling void into areas not exceeding 20Metres in one direction. Fit tightly and fix securely at perimeter and vertical joints leaving no open gaps

Minimum thickness for continuous clamping angle and strap: 1.5mm. Minimum diameter for threaded studs or bolts: 5mm installed at every 400mm interval. Minimum diameter for Lacing Wire: 0.5mm stitching at every 100mm interval along the butt, overlap or face to face joints.

FIXING DETAIL

Rockwool Fire Barrier