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ETA - European Technical Assessments

ETA -  are the only pan European means by which construction fixings are independently assessed and by which they can be compared. They are awarded following comprehensive testing to framework documents, which explore the functionality of the anchors in a wide range of site conditions  and determine the performance values by which they may be designed (selected).  

Until July 2013 - under the Construction Products Directive (CPD)  - "ETA" stood for European Technical Approvals and were assessed according to European Technical Approval Guidelines. (ETAGs).  After the CPD was replaced by the Construction Products Regulation (CPR) ETAs awarded since that date have been referred to as European Technical Assessments and the Guidelines by which they are assessed (ETAGs) are in the process of being replaced by European Assessment Documents (EAD).  

For more on this subject see Guidance Note: ETAs and Design Methods for Anchors used in Construction.

All Current ETAGs are listed here along with Technical reports, also published by EOTA, which deal with certain specific subjects directly associated with some of the ETAGs.

All currently published ETAGs may be viewed and downloaded from the EOTA website under the heading "ETAGs used as EAD" the link is : http://www.eota.eu/en-GB/content/etags-used-as-ead/26/

ETApprovals are found here: http://valideta.eota.eu/pages/valideta/

ETAssessments are found here: http://eota.eu/pages/etassessments/default.aspx

Technical reports, which are documents intended to help with the interpretation of certain ETAGs,  may be viewed here: http://www.eota.eu/en-gb/content/technical-reports/28/

European Technical Assessments – ETA

ETAG 001 Metal anchors for use in concrete Parts 1 - 5

ETAG 001 Metal anchors for use in concrete  Parts 1 - 5

The main ETAG for anchors used in safety critical applications which may be statically determinate or statically indeterminate i.e. there may or may not be a degree of redundancy in the way loads are transferred from the fixture into the base material. This ETAG offers manufacturers a range of options which cover applications with varying degrees of complexity. Options 1 - 6 cover use in Cracked and non-cracked concrete (and ascribes higher characteristic resistance to the non-cracked concrete condition) while options 7 - 12 cover use in non-cracked concrete only. As most concrete is considered cracked only options 1 - 6 will cover the majority of applications and of these option 1 will provide the most flexibility for design and the best chance of satisfying awkward application parameters involving close edges and spacings of anchor in groups.

The following parts are included.

  • Part 1 General
  • Part 2 Torque controlled expansion anchors 
  • Part 3 Undercut anchors
  • Part 4 Deformation controlled anchors
  • Part 5 Bonded anchors*
  • Part 6 Anchors for multiple use in non-structural applications
  • Annex A Test requirements
  • Annex B Tests for admissible service conditions
  • Annex C Design methods**
  • Annex D Assessment of metal anchors under dynamic (fatigue) actions  (yet to be drafted as at 04 2012)
  • Annex E Assessment of metal anchors under seismic actions (in draft form as at 04 2012)
  • Annex F Evaluation of anchorages in concrete concerning resistance to fire (To be based on TR 20)

* Requirements for Torque controlled bonded anchors are covered in an EOTA  Technical Report: TR 018 Assessment of Torque controlled bonded anchors; while Assessment of post-installed rebar connections is dealt with in TR 023.

** Design of bonded anchors is covered in TR 029. Design of all anchor types may also be carried out to the appropriate section of CEN TS 1992 Part 4, if that is called up in the ETA.  

ETAG 001 Metal anchors for use in concrete Part 6

ETAG 001 Metal anchors for use in concrete Part 6: Anchors for multiple use in non-structural applications.

Effectively this Guideline, although a part of ETAG 001, is in reality a separate ETAG and covers a very distinct and narrow set of applications. It is aimed primarily at suspended ceilings and other applications involving the suspension of services from concrete soffits and where redundancy is involved i.e. the failure of one anchor will not lead to collapse of the whole system. It may apply to other uses that fulfil the application criteria.  It covers use in concrete which may be cracked or non-cracked (but does not differentiate between the two regarding characteristic resistance). Strict application parameters are given for an application to qualify as "Multiple use" (see link to anchor selector) but as long as these are met then no calculation need be made for the stiffness of the supported structure. 

ETAG 014

ETAG 014 Plastic anchors for fixing of external thermal insulation composite systems with rendering.

The title of this ETAG says it all really. Approvals may be gained in a variety of base materials including concrete (normal weight; lightweight aggregate or autoclaved aerated) and/or masonry units of clay, calcium silicate, aggregate concrete, autoclaved aerated concrete or other similar materials. In the case of fixing to masonry if the masonry units of the job do not meet or exceed the strength and dimensions of those quoted in the ETA then job site tests must be carried out to the recommendations of Annex D of this ETAG OR to a simplified test regime described in BS 8539 Annex B.2.2. when published.

ETAG 020

ETAG 020 Plastic anchors for multiple use in concrete or masonry for non-structural applications.

This ETAG deals with plastic anchors in a variety of base materials as listed below and again deals with applications for "Multiple Use" but its definition of that term varies slightly compared to ETAG 001 Part 6.

  • 5 parts cover 1) General requirements, use in 2) normal weight concrete, 3) solid masonry, 4) hollow or perforated masonry and 5) autoclaved aerated concrete. 
  • 3 annexes cover A) Details of tests, B) Recommendations for tests to be carried out on the construction works and C) Design Methods for anchorages.

Where the masonry units of the job do not meet or exceed the strength and dimensions of those quoted in the ETA then job site tests must be carried out to the recommendations of Annex B of this ETAG OR to a simplified test regime described in BS 8539 Annex B.2.2. when published

ETAG 029

ETAG 029 Metal injection anchors for use in masonry.

The problematic application of fixing to masonry is handled by anchors with ETA to this ETAG. It covers use in masonry units of clay, calcium silicate, normal weight concrete, lightweight aggregate concrete, autoclaved aerated concrete or other similar materials and includes hollow or perforated masonry units  as well as solid ones.

It covers applications where failure of a single anchor may result in collapse of the works so may be used for a wide range of safety critical applications.

Where the masonry units of the job do not meet or exceed the strength and dimensions of those quoted in the ETA then job site tests must be carried out to the recommendations of Annex B of this ETAG OR to a simplified test regime described in BS 8539 Annex C.2.2.1. and C.2.2.2. when published

TR20

TR20 Evaluation of Anchorages in Concrete concerning Resistance to Fire

This Technical report allows additional tests to be carried out so that an assessment of the resistance to fire can be included in the ETA. If resistance to fire has been taken into account in the test and assessment of the anchor it will be stated in the ETA.

TR29

TR29 Design of bonded anchors

This Technical report deals with the Design Method for bonded anchors with ETA gained to ETAG  001 Part 5 and shares much of it's fundamental approach with Annex C of ETAG 001 but takes into account the different performance arsing from the operating mechanism of bonded.

See also CEN TS 1922 Part 5 -5 which will eventually supersede this TR but is relevant only if called up in the ETA.