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Helifix provide efficient lintel creation for Trulock Court

Client: London Borough of Haringey
Location: Tottenham, North London
Approved Installer: Kafften Ltd
Reference No: CS089

An absence of lintels posed an awkward problem when a window replacement programme was planned at Trulock Court, a 10 storey residential tower block. Furthermore, a survey had discovered a serious lack of existing wall ties which needed to be added to. A cavity wall construction with outer leaf brickwork and inner leaf blocks on a concrete frame, Trulock Court is a 'Y' shaped building and its windows were to be replaced with new UPVc frames on all nine elevations. However, the masonry above each opening was only supported by the current load bearing metal windows.

The Helifix Solution

The Helibeam System avoided the difficulty and expense of using temporary mechanical supports and the time consuming installation of new concrete lintels. Also, by utilising the existing brickwork, it was much quicker and had no visible effect on the building's appearance.

  • Pairs of stainless steel HeliBars were bonded, with HeliBond cementitious grout, into cut out mortar beds five courses apart above each window. These form new masonry beams which supported and distributed the vertical loads.
  • DryFix ties were installed vertically into the newly created'lintel to secure the stretchers, allowing the old windows to be removed without structural movement.
  • A total of 7,000 RetroTie remedial wall ties were installed on all elevations. Driven into the inner leaf, via an outer leaf clearance hole, they were resin bonded into the outer leaf brickwork after regular pull out tests had been successfully conducted.

The Helibeam System provided a rapid, economical and non-disruptive solution enabling the window replacement programme to be completed quickly and efficiently and meet the strict contract period of just three weeks. To download a pdf of this case study click here