Helifix masonry reinforcement at Williamson Square

Helifix masonry reinforcement at Williamson Square

The project engineers asked Helifix to design a suitable structural solution to reinforce party walls during demolition and development of neighbouring properties at Williamson Square, Liverpool, and a scheme was devised using grouted CemTies and SockFix grouted sock anchors.

A number of dilapidated Victorian three storey buildings were to be demolished to make way for some new retail units. However, a laser survey showed that the adjacent concrete frame building, constructed in the 1970’s, had been built into the gable end wall of the properties to be demolished, with the two adjacent 9” walls in effect creating a solid party wall which had to be tied together and retained.

Over 1,000 8mm stainless steel CemTies of varying lengths, bonded with HeliBond cementitious grout, were installed in a 450mm x 450mm staggered formation to tie together the two adjacent gable end walls.

Some 60 SockFix grouted anchors, 1,500mm long, were then installed at 600mm horizontal centres into the hollow concrete floor slab of the adjacent building at each floor level. These secured the retained gable wall to the main structure of the existing adjacent building. The Helifix ties and anchors provided a fast, efficient and economical solution and, with the wall fully secured, the main contractor was able to proceed with the demolition without any major contract delays.

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