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ETA - European Technical Assessments

The Construction Products Regulation lays down harmonised rules for the marketing of construction products.

Standards are developed by European standardisation bodies, and define the methods and criteria for assessing the performance of the product in relation to its “essential characteristics”.

Where a harmonised standard exists for a product, the CPR places obligations on manufacturers, distributors and importers of that product when it is placed on the market. The product must have a declaration of performance and have been affixed with CE marking.

The CPR also allows manufacturers to affix CE marking to products that are not covered by a harmonised standard. This is by applying for a technical assessment of their product based on a “European Assessment Document” (EAD).

In summary, for products used in construction to be affixed with a CE mark, they must comply with an hEN of alternatively obtain an ETA based on the relevant EAD

EAD
As stated above, the EAD is a harmonised Technical Specification under CPR, and assesses the performance of a product in relation to its essential characteristics, and contains:-
General product description
List of essential characteristics for the intended use
Methods and criteria for assessing performance
AVCP – principles for the applicable factory production control
EAD’s are used by Technical Assessment Bodies (TAB) for issuing European Technical Assessments (ETA)

ETA
The ETA is a document providing information about the performance of a construction product to be declared in relation to its essential characteristics, and is the basis for a Declaration of Performance to be drawn up by the manufacturer.
The ETA contains the following:-
Manufacturer details
Product name and intended use
Manufacturing plant
Details of the assessment program and the performance of the product
The control task of the manufacturer, depending on the relevant AVCP systems

European Assessment Documents and Technical Report's

EAD 330232-00-0601
Mechanical fasteners in concrete
EAD 330499-00-0601
Bonded fasteners for use in concrete
EAD 330747-00-0601
Fasteners for use in concrete for non-structural systems
This allow for redundancy calculation for anchors in cracked concrete
EAD 330076-00-0604
Metal injection anchors for use in masonry
EAD 330087-00-0601
Systems for post-installed rebar connections with mortar
EAD 330196-01-0604
Plastic anchors made of virgin or non-virgin material for fixing of external thermal insulation composite systems with rendering
TR020
Resistance to Fire
TR048
Test in concrete (with EAD 330232-00-0601)
TR051
Site tests for plastic anchors


Prior to introduction of CPR and the EAD system we had ETAGuidelines (ETAG). These old codes are explained below for information and reference.
 

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.