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26/07/2018 12:01 pm
Hi there,
I am wondering what people are doing regarding the design of post installed anchors in regions where concrete cracking is very unlikely (for example mass concrete foundations or at the top of 40 MPa precast concrete panels where Mcr >> M* and shrinkage and construction cracking is very unlikely)? The new sentence on 17.5.5 of NZS 3101 A3 is prescriptive and it appears we have to design post installed connection according to EOTA TR045, which only allows for essentially C2 category in New Zealand which appears to be overly conservative in some cases. The main fixing suppliers (wont mention any names…) are obviously pushing for this which is fine from their perspective but in reality this is adding significant additional costs to builds. Is there a gap in the code? Thanks
31/07/2018 12:47 pm
Standards Australia have recently published AS 5216: 2018 ‘Design of post-installed and cast-in fastenings in concrete’, which is based on the forthcoming structural Eurocode EN 1992-4. Whilst HERA and SCNZ were on the Committee responsible for this standard, there wasn’t sufficient interest from New Zealand to contribute to its development.
30/10/2018 10:09 am
Dear Max,
I am Enrique del Rey Castillo, a Lecturer at the University of Auckland and, together with Professor Jason Ingham (as chair of Chapter 17), have created a thread to discuss how to interpret Amendment 3 in regards to post-installed anchors. There are also a few other questions. Please feel free to give us your feedback there, thanks.
Regards,
Enrique.
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