{"id":1401,"date":"2017-11-10T17:24:19","date_gmt":"2017-11-10T17:24:19","guid":{"rendered":"http:\/\/blogs.napier.ac.uk\/cwst\/?p=1401"},"modified":"2017-11-10T17:24:19","modified_gmt":"2017-11-10T17:24:19","slug":"update-en14081-1","status":"publish","type":"post","link":"https:\/\/blogs.napier.ac.uk\/cwst\/update-en14081-1\/","title":{"rendered":"Update on EN14081-1"},"content":{"rendered":"

If you have been following the saga of Harmonized European Standards that have not yet been\u00a0cited in the Official Journal of the European Union you will know that we have some standards (including the one for production of structural timber, by machine or visual grading: EN 14081-1) that sit in a strange limbo of being the current EN (and BS EN) while the withdrawn previous version remains the official Harmonized Standard<\/a>\u00a0and therefore the one to actually use (although that is subject to interpretation by the Notified Bodies).<\/p>\n

Harmonized Standards are different from regular ENs in the sense that they have a different trigger\u00a0 – EU legislation (in the case of structural timber, the\u00a0Construction Products Regulation<\/a>).\u00a0 This means there is an extra acceptance procedure that results in them being cited in the\u00a0Official Journal of the European Union<\/a>\u00a0(OJEU).<\/p>\n

But, when a new EN is published by the European Committee for Standardization, CEN (which is separate from the EU<\/a>), the member National Standards Bodies (of which the British Standards Institute<\/a> is one) are obliged to publish it and withdraw the previous version.\u00a0 Until that new version is cited in the OJEU\u00a0it does not have proper status as a Harmonized Standard, but it is supposed to be suitable for acceptance and citation in the OJEU in good time to use it.<\/p>\n

Until about a year ago this\u00a0has gone relatively smoothly \u2013 but something clearly went wrong and we ended up with a large number of\u00a0Harmonized \u00a0Standards that remained uncited in the OJEU for a very long time.\u00a0\u00a0In October, the European Commission launched an action plan to address this problem<\/a>\u00a0although it stretches into 2018 so we have to hold our breath still longer.<\/p>\n

But what about the specific case of EN 14081-1:2016?<\/p>\n

Well, it is still not 100% clear what the problem was with this – but it appears to be a case of different understandings of what a grade\/class is.\u00a0 For structural timber we have a great many strength classes – and you are free to invent even more if you want to<\/a>.\u00a0 They are really just a convenient way of declaring properties for design.\u00a0 For some materials, a grade or class is a kind of restriction – something new that must be met…but for timber, adding more strength classes adds more options, not more restrictions.<\/p>\n

And, in fact, we didn’t even add any new strength classes at all – we merely added already existing tension strength classes into EN 338 for convenient reference. We then updated EN 14081-1 so you could better understand what was required when using these tension strength classes – and finally remembered we needed also to mention hardwood D classes that have been around since the beginning.<\/p>\n

So, adding reference to these strength classes to the table of visual override requirements appeared to some people as if it was adding new restrictions – and it seems that was the reason for non-citation. If that really is the case, it has been relatively easy to fix – with editing of the text to remove specific reference to these (not actually new) classes – and replacing it with some less concise, and more general text that serves the same purpose.\u00a0 A corrigendum for EN 14081-1:2016 has been prepared by CEN TC124<\/a>.<\/p>\n

There was one other comment from the European Commission, but it referred to a clause that isn’t actually in EN 14081-1 – and water absorption – so we presume it is not relevant.<\/p>\n

Now CEN TC124 <\/a>awaits a response from the European Commission and CEN.<\/p>\n","protected":false},"excerpt":{"rendered":"

If you have been following the saga of Harmonized European Standards that have not yet been\u00a0cited in the Official Journal of the European Union you […]<\/a><\/p>\n<\/div>","protected":false},"author":57,"featured_media":461,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","jetpack_post_was_ever_published":false,"footnotes":""},"categories":[5],"tags":[9,19,20,67],"class_list":["post-1401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-standards","tag-en14081","tag-machine-grading","tag-strength-grading","tag-visual-grading"],"yoast_head":"\nUpdate on EN14081-1 - Centre for Wood Science & Technology<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.napier.ac.uk\/cwst\/update-en14081-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Update on EN14081-1 - 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