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TTDT Stainless Steel Double Triangle Wall Ties | Tangle Free | BS EN846 | Suppliers UK


The traditional wall tie for domestic houses and small commercial buildings of up to three stories or a maximum 15m in height. Fully tested to BS EN 846-5:2000 the ties meet the requirements of BS EN 845-1:2003 and DD140: Part 2. They also meet the requirements of Part E of the Building Regulations for Type B in external walls.

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building diagram
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Technical Information

Size Cavity Width Product Code
200mm 50mm to 75mm TTDT 200
225mm 76mm to 100mm TTDT 225
250mm 76mm to 100mm TTDT 250
300mm 76mm to 100mm TTDT 300

Classification Field of use
Type of structure and frequency of tying
Geographical location
Type 2. (Masonry: General purpose). Suitable for masonry cavity walls of domestic houses and small commercial buildings of up to three storeys, i.e. not greater than 15m in height, comprising two leaves of brick or blockwork of similar thickness in the range 90mm to 150mm. May be suitable for cavity walls having leaves of disperate thickness or stiffness or for cladding walls in high rise buildings, but should only be used in these situations if shown to be of adequate performance by calculation. Density not less than 2.5 ties per square metre. Flat sites where the
basic wind speed is
up to 31m/s at an
altitude no more than
150m above sea level.

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