Wall Ties & Restraint Fixings
Approved Document E
Approved Document E: Resistance to the Passage of Sound
This document specifies the acoustic performance requirements of ties suitable for use in separating walls (Type A ) and external walls (Type B) of new build dwellings.
Type A ties must have a measured dynamic stiffness of <4.8MN/m3 for the specified minimum cavity, at a standard density.
Type A ties throughout the site are indicated by this logo e.g. Staifix HRT4, ACOU Acoustic Wall Tie Range.
Staifix HRT4
All Ancon ties which cross a cavity meet the requirements of Type B.
How the dynamic stiffness of wall ties is measured
The ends of six samples of each tie are cast into 100mm square concrete blocks, the blocks are suspended, one block excited and the frequency response measured. From these tests the mean dynamic stiffness is calculated for the specific cavity and multiplied by the tie density (usually 2.5 tie/m2). The results are shown in MN/m3.
Latest News
Ancon transitions to ISO 9001:2015 and ISO 14001:2015 ahead of 2018 deadline
Ancon is pleased to announce that it has successfully transitioned its Quality and Environmental Management Systems to ISO 9001:2015 and ISO 14001:2015 respectively, well ahead of the September 2018 industry deadline.
Ancon further extends its ST1 wall tie range for super-insulated high-rise buildings
Now available in lengths of 325mm and 350mm, the Ancon ST1 wall tie range has been extended to suit high-rise masonry buildings with insulated cavities up to 225mm wide.