{"id":1117,"date":"2017-01-11T13:55:31","date_gmt":"2017-01-11T13:55:31","guid":{"rendered":"http:\/\/blogs.napier.ac.uk\/cwst\/?p=1117"},"modified":"2017-01-11T13:55:31","modified_gmt":"2017-01-11T13:55:31","slug":"research-note-minor-conifer-species","status":"publish","type":"post","link":"https:\/\/blogs.napier.ac.uk\/cwst\/research-note-minor-conifer-species\/","title":{"rendered":"Research note &#8211; minor conifer species"},"content":{"rendered":"<p>Forestry Commission has published a research note with a summary of the basic wood properties information that David Gil-Moreno obtained in his PhD project. \u00a0You can <a href=\"http:\/\/www.forestry.gov.uk\/PDF\/FCRN026.pdf\/$FILE\/FCRN026.pdf\" target=\"_blank\">download a free copy here<\/a>.<\/p>\n<p>This work is thanks to the financial support of the <a href=\"http:\/\/www.scottishforestrytrust.org.uk\/\" target=\"_blank\">Scottish Forestry Trust<\/a>, <a href=\"http:\/\/scotland.forestry.gov.uk\/\" target=\"_blank\">Forestry Commission Scotland<\/a> and <a href=\"https:\/\/naturalresources.wales\" target=\"_blank\">Cyfoeth\u00a0Naturiol Cymru<\/a> (Natural Resources Wales) &#8211; to whom we are very grateful. \u00a0We would also like to thank\u00a0Andrew Price (<a href=\"http:\/\/www.forestry.gov.uk\/forestresearch\" target=\"_blank\">Forest\u00a0Research<\/a>) for help finding suitable sample sites and organizing the necessary forest\u00a0operations.<\/p>\n<p>Abstract &#8220;The softwood processing sector in Great Britain has been built around the use of a very small number of timber producing\u00a0species \u2013 predominantly Sitka spruce. The recent increase in outbreaks of host-specific tree pests and\u00a0diseases has led to an interest in diversification, through planting a wider range of tree species, to mitigate any risk\u00a0to the softwood resource. However, there is a lack of evidence about how this diversification will impact on the future\u00a0merchantability of timber. This Research Note investigates the structural timber properties of noble fir, Norway spruce,\u00a0western red cedar and western hemlock grown in Great Britain and compares the results with published values for\u00a0British-grown Sitka spruce. The study was carried out using timber from even-aged plantations growing in a range\u00a0of latitudes representative of productive conifer forests. Twenty-seven trees per species were felled, processed into\u00a0structural-sized battens, kiln dried and destructively tested in a laboratory according to current European standards.<br \/>\nCharacteristic values of mechanical properties and density were determined and indicative yields for different strength\u00a0classes were calculated. The results showed that all of the species investigated can produce structural timber, but that\u00a0western red cedar has the least desirable properties for this purpose. Some further work is under way in order to\u00a0investigate the effect of rotation length on the timber properties of these species.&#8221;<\/p>\n<p>Conclusion &#8220;The results of this study indicate that timber produced from\u00a0noble fir, Norway spruce, western red cedar and western\u00a0hemlock grown in Great Britain is capable of meeting strength\u00a0classes required for use in construction. High yields of C16\u00a0timber, which is the lowest class customarily used for\u00a0construction in the UK, were obtained for all of the species.\u00a0An extension of this study with more pieces of timber could\u00a0be considered to produce grading machine settings&#8221;<\/p>\n<p>David Gil-Moreno, Dan Ridley-Ellis and Paul McLean &#8220;Timber properties of noble fir, Norway\u00a0spruce, western red cedar and western\u00a0hemlock grown in Great Britain&#8221;, Forest Research, Research Note FCRN026, December 2016<\/p>\n<p>Note, as with all the grading work, yields are indicative, and actual results will vary depending on the quality of the material being graded. This work involved only about 1\/4 of the amount required to develop formal grading settings &#8211; and while we have made every effort to make our sampling representative, it must be appreciated that it is\u00a0relatively small.<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>Forestry Commission has published a research note with a summary of the basic wood properties information that David Gil-Moreno obtained in his PhD project. \u00a0You <a class=\"mh-excerpt-more\" href=\"https:\/\/blogs.napier.ac.uk\/cwst\/research-note-minor-conifer-species\/\" title=\"Research note &#8211; minor conifer species\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":57,"featured_media":75,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","jetpack_post_was_ever_published":false,"footnotes":""},"categories":[4,6],"tags":[17,41,39,20,40,42],"class_list":["post-1117","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publications","category-research","tag-alternative-conifers","tag-noble-fir","tag-norway-spruce","tag-strength-grading","tag-western-hemlock","tag-western-red-cedar"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Research note - minor conifer species - Centre for Wood Science &amp; 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