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Concrete In Australia : March 2013
Concrete in Australia Vol 39 No 1 21 in Australia, except for brace inserts for temporary bracing of precast panels (provisions are covered in AS3850). On the other hand, testing and evaluation of different types of anchors are covered in Europe by the European Technical Approval Guidelines (ETAG) and in the US by a number of American Concrete Institute (ACI) and International Code Council (ICC) publications. e testing and evaluation procedures are intricate due to the complexity of the potential failure modes and behaviour under different installation and environmental conditions. • ere are no Australian design standards or guidelines for anchors in general applications. Australian engineers typically rely on design data or software tools provided by suppliers which often lack consistency in terminology and design approach. • e performance of anchors can be particularly sensitive to installation (such as cleaning procedure of holes). While the construction industry in Australia relies on appropriately trained and qualified welders in structural steel, it is not the case for anchors. In other parts of the world training and certification of installers has been recognised as a critical element of quality assurance as evidenced by the newly introduced ACI Adhesive Anchor Installation Certification Program for installers (www.acicertification.com). • In general, there is little or no coverage of anchoring in undergraduate engineering programs in Australia. Indeed, formal local training opportunities have been limited. • e construction industry in Australia has not had a culture that requires conformity assessment of products, which can explain some of the confusion in relation to how to demonstrate that the specified requirements related to a product are met. is often leads to either unnecessary testing or products incorrectly accepted or dismissed. In order to address the above issues and to assist the construction industry at large, a new consortium made of leading national and multinational firms and an academic institution was formed in 2012. is is the Australian Engineered Fasteners and Anchors Council (AEFAC). AEFAC s founding members are Ancon Building Products, Hobson Engineering Co, Hilti (Aust), ITW Construction Systems, Powers Fasteners Australasia, Swinburne University of Technology and Würth Australia (www.AEFAC.org.au). AEFAC is based at Swinburne University of Technology where it has access to world-class testing facilities for fasteners and anchors. AEFAC has resolved that the specifications and design provisions outlined in ETAG are most appropriate for Australian practice. is is consistent with the specifications set by the Australian Technical Infrastructure Committee (ATIC). AEFAC has commenced the adaptation of ETAG 001 (Metal anchors for use in concrete) for Australia and will be promoting it as an industry code of practice in the near future. Among other initiatives, AEFAC will also develop a training and certification scheme for installers to enhance the quality and reliability of installation of anchors. e formation of AEFAC is an important step in creating a local body of knowledge in the anchoring industry with appropriate research and testing capabilities. is initiative will facilitate future enhancements in specification, design and installation standards as well as encourage local innovation. Figure 1b. The point of failure of a bonded anchor in mature concrete.