ROOFING & CLADDING
HELIFIX STRUCTURAL REPAIRS REINSTATE ARCHES AT HISTORIC ALLY PALLY
As part of a refurbishment and restoration programme at the world famous Alexandra Palace , structural repair experts , HELIFIX , devised a bespoke repair solution to strengthen an arch window and two adjacent minor arches on the north-west tower .
Historic movement of this Grade II listed building had caused loss of compression in the arches , allowing them to relax and move . The Helifix engineered design permanently and innovatively tied the three arches together , addressing both structural and aesthetic requirements , enabling previously added brick and steelwork to be removed and the original window opening to be reinstated .
A combination of Helifix masonry repair products and concealed installation techniques were used .
HeliBars were bonded into the mortar beds above the arches to reinforce the masonry , create deep masonry beams and spread the structural loads . Fully grouted CemTies were installed up through the arches to secure them to the masonry and support the lintel loads . Once the HeliBars and CemTies had been installed the infill brickwork and steel beam were removed .
Careful alignment of two 7m long SockFix bars , virtually hidden from view , were carefully installed through all three arches and positioned in line with window transoms .
Once the repairs were completed , the historic arches were reinstated , the original window frames retained and the tower ’ s aesthetics and original materials were preserved .
For project-specific technical advice about the use of Helifix concealed structural repair products and techniques contact the Helifix team on 020 8735 5200 .
Alternatively , go to www . helifix . co . uk for full product information , relevant literature and a wide range of case studies .
Tel : 020 8735 5200 | Email : sales @ helifix . co . uk Web : www . helifix . co . uk
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