The unique tangle free design of TecTies Type 4 Light Duty Tie offers a practical and cost effective solution for masonry cavity walls in box form domestic dwellings of up to a maximum 10m in height. Fully tested to BS EN846-5:2012 the ties meet the requirements of BS EN 845-1:2013 and they will also meet the requirements of Part E of the Building Regulations for a Type A in party walls of any height.