HRT4 is suitable for cavities from 50mm to 150mm and can be used in the construction of domestic houses up to 10 metres in height. Altitude and wind speed restrictions may apply.
It is also a Type A tie for internal separating walls of buildings of any height (cavities: 50-100mm; 125-150mm). BBA approval covers 200mm and 225mm lengths.
225mm for cavity 76-100mm
250mm for cavity 101-125mm
275mm for cavity 126-150mm
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