{"id":530,"date":"2016-02-29T11:48:51","date_gmt":"2016-02-29T11:48:51","guid":{"rendered":"http:\/\/blogs.napier.ac.uk\/cwst\/?p=530"},"modified":"2016-03-20T12:22:26","modified_gmt":"2016-03-20T12:22:26","slug":"grading-standards-update","status":"publish","type":"post","link":"https:\/\/blogs.napier.ac.uk\/cwst\/grading-standards-update\/","title":{"rendered":"Grading standards update (!!)"},"content":{"rendered":"

For the following, it may be helpful to refer to the CEN webpages that explain the various stages of drafting standards<\/a>.<\/p>\n

The formal vote on European Standard EN14081-1 \u201cTimber structures \u2013 Strength graded structural timber with rectangular cross section \u2013 Part 1 General requirements\u201d was passed in January, and now a revised version has been published (details here<\/a>). \u00a0This has yet to be published by the British Standards Institute. \u00a0BSI committee B\/518 will meet on 15th March to discuss a possible National Annex that clarifies the situation for packaged marked timber in the UK.<\/p>\n

A draft proposal for a new version of EN14081-2 \u00a0“Timber structures – Strength graded structural timber with rectangular cross section – Machine grading; additional requirements for initial type testing” has been prepared by the\u00a0Gradewood Transition Project and now CEN TC124 WG2 is working on it. \u00a0There are substantial changes to the way machine grading would be done – both for machine control and for output control. \u00a0A new approach of “adaptive settings” is also added. \u00a0Expect Enquiry (publishing for comments) to open in May and close early August. \u00a0This is a key standard and the changes are large and complicated.<\/p>\n

Revision of\u00a0EN14081-2 requires also a revision of\u00a0EN14081-3 “Timber structures – Strength graded structural timber with rectangular cross section – Machine grading. Additional requirements for factory production control” for consistency. \u00a0The main changes here will relate to factory production control for output controlled systems. \u00a0Expect Enquiry to open in May (in parallel with part 2).<\/p>\n

EN14081-4 “Timber structures – Strength graded structural timber with rectangular cross section. Machine grading – Grading machine settings for machine controlled systems” will be deleted as it is too problematic to publish machine settings in a standard. \u00a0Settings will be available through Sector Group 18 (for Notified Bodies) and grading machine manufacturers.<\/p>\n

Formal votes passed on EN338, EN384, EN14358 (with editorial comments) and the definitive texts are expected in early April.<\/p>\n","protected":false},"excerpt":{"rendered":"

For the following, it may be helpful to refer to the CEN webpages that explain the various stages of drafting standards. 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