Masonry Repair & Reinforcement


The innovation of hammer driven helical fixings originated from a GKN/Timber Research and Development Association (TRADA) programme undertaken in the 1970’s, headed by their Chief Architect John Ollis. Together with his son Henry they researched, tested, developed and patented a wide range of fixing and reinforcement technologies using extrusions, drawn tubes and wire

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As the originators and pioneers of the helical fixing concept, John and Henry Ollis founded HELIFIX Ltd in 1984, to exploit their early-patented technologies under licence. HELIFIX was licensed to manufacture under the Ollis’s two patents, EP0150906B1 and EP0171250B1 in 1986, and subsequently Target Fixings Ltd., (U.K.), and Brutt Helical Kft were also licensed. Many helical stainless-steel ties and reinforcement wires bear the Ollis’s Pat. No. 171250. This is a European Patent No EP0171250B1 which had a priority date of 31/07/1984 which expired in July 2005. In the late 1990’s the Ollises formed the Thor Helical product development team to progress and nurture new concepts, with highly consistent characteristics, using precision engineering to tolerance levels that had not previously been achievable. This comprehensive second-generation range of Thor Helical precision engineered helical bars, wall ties, fixings and anchors have been designed to suit a variety of construction and repair applications. New patents have been filed on many products, manufacturing methods and building applications, as one innovation.