Open State Cavity Barrier

ARC Open State Cavity Barrier

Open state cavity barrier for ventilated cavities

  • Reactive intumescent element
  • Either 60min or 120min fire integrity
  • 25mm or 44mm air gap for ventilated cavity
  • Tested for ASFP TGD19 standards
  • Fixing brackets included as standard
  • Suitable for use horizontally

Description

ARC OSCB cavity barriers are designed for installation within cavities where ventilation is required in service use. Manufactured from non-combustible rockfibre mineral wool with a reactive intumescent layer, the cavity barrier can provide an air gap of up to either 25mm or 44mm.

The intumescent layer will rapidly expand when exposed to heat in a fire event, closing off the air gap and preventing vertical fire spread within the external wall cavity.

Suitable for installation horizontally, ARC OSCB open state cavity barriers should be partnered with ARC Fire Stop Slab installed vertically for a complete cavity barrier solution.

Key stats

OSCB25

Cavity widths available 40 – 450mmm
Max. air gap 25mm
Colour Red with green strip
Fire performance: Integrity 60 mins
Fire performance: Insulation 60 mins
Dimensions Depth : Cavity width less 25mm - Thickness: 75mm - Length: 1200mm
Fixing method ARC Pigtail Screw + ARC OSCB Fixing Bracket

OSCBPLUS25

Cavity widths available 40 - 300mm
Max. air gap 25mm
Colour Red with blue strip
Fire performance: Integrity 120 mins
Fire performance: Insulation 120 mins
Dimensions Depth : Cavity width less 25mm - Thickness: 75mm - Length: 1200mm
Fixing method ARC Pigtail Screw + ARC OSCB Fixing Bracket

OSCB44

Cavity widths available 60 – 300mm
Max. air gap 44mm
Colour Red with yellow strip
Fire performance; Integrity 60 mins
Fire performance: Insulation 60 mins
Dimensions Depth : Cavity width less 44mm - Thickness: 75mm - Length: 1200mm
Fixing method ARC OSCB Fixing Bracket only

Notes: see separate fixing details for specific bracket specification relevant to cavity width and barrier type.

Please contact us for requirements outside of these ranges. Non standard details, sizes and test data may be available.

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