Fixing Brackets

Fixing Brackets for Fire Stop Slabs

Fixing brackets secure fire-stop slabs and cavity barriers in cavity walls and ceiling voids. Without proper fixing, fire-stop slabs can sag, displace or fall out under their own weight — defeating the fire-stopping function. The right bracket holds the slab tight against the inner leaf throughout the building's life.

Spechunter stocks Rockwool SP fixing brackets — the specifier's standard for use with Rockwool and ARC fire-stop slab systems.

What's in the Range

Rockwool SP/S Small Fixing Brackets (Box of 50) — for cavities up to 150mm. Galvanised steel construction. Pre-formed shape locates the slab against the inner leaf and holds it under spring tension as the wall is built up.

Rockwool SP/L Large Fixing Brackets (Box of 50) — for cavities from 150mm to 400mm. Same principle as the SP/S but sized for wider cavities where the slab span is greater.

Compatibility

Rockwool SP brackets are designed for use with:

  • Rockwool SP60 fire-stop slab
  • Rockwool SP120 fire-stop slab
  • ARC Fire Stop Slab system
  • Most other rigid mineral-fibre cavity barrier products

Always cross-reference the bracket selection against the manufacturer's installation guidance for your specified slab — different slab thicknesses and densities may require specific bracket types.

Installation

Brackets are fixed to the inner leaf at regular spacing (typically 600mm centres) before the slab is offered up. The slab is pushed against the brackets, which spring-grip and hold it in position. The masonry is then built up around the slab. Once the brick courses cure, the slab is locked permanently in place.

Bracket spacing follows the project's structural and fire specification — typically 600mm horizontally for wall applications, but check the architect's drawing for project-specific spacing requirements, particularly around openings and at floor levels.

Order before midday for next-day delivery on orders over £200 ex-VAT.

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