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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. Ancon Staifix HRT4, ACOU Acoustic Wall Tie Range.

Staifix HRT4

Ancon 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.

BIM Objects

CAD Drawings

Latest News

Leviat Expands Its Range of Non-Combustible Clips

Leviat, leading manufacturer of engineered construction solutions, has launched its second non-combustible clip to the range - the Ancon A1-S Insulation Retaining Clip. This new A1-rated, non-combustible clip has been specifically designed for use with Ancon flat wall ties, including SDB, SD21 and YDB.