Skip to content

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

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

Innovative Ancon rebar connectors used in iconic Russian skyscraper

Innovative and quick-to-install reinforcing bar couplers from Ancon replace time-consuming lapped joints and minimise reinforcement congestion in the gigantic concrete superstructure of Europe’s tallest building; the 87-floor, 462m high helicoidal Lakhta Tower in St. Petersburg.

Ancon leads industry transition to ISO 45001

Ancon is pleased to announce it has become one of the first businesses to transition its Occupational Health and Safety Management (OHS) to the new International standard ISO 45001:2018.