{"id":327,"date":"2017-04-11T15:22:00","date_gmt":"2017-04-11T15:22:00","guid":{"rendered":"https:\/\/advantageflorestal.com.br\/?page_id=327"},"modified":"2017-04-11T15:22:00","modified_gmt":"2017-04-11T15:22:00","slug":"the-janka-scale","status":"publish","type":"page","link":"https:\/\/advantageflorestal.com.br\/de\/the-janka-scale\/","title":{"rendered":"The Janka Scale"},"content":{"rendered":"<p><img decoding=\"async\" class=\"full-width\" title=\"Janka hardness unit By Region\" src=\"https:\/\/www.advantageflorestal.com.br\/wp-content\/uploads\/2017\/04\/Janka_map-1.png\" alt=\"Janka hardness unit By Region\" \/><\/p>\n<h2 style=\"text-align: center;\">The Janka Scale for our hardwood species<\/h2>\n<div class=\"barchart\">\n<ul class=\"chart--horiz\">\n<li class=\"chart__bar\" data-skill=\"30\"><span class=\"chart__label\">Andiroba 1,220 lbf (5,430 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"40\"><span class=\"chart__label\">Taurai 1650 lbf (7339.56 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"42.5\"><span class=\"chart__label\">Garapa 1700 lbf (20,040 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"43\"><span class=\"chart__label\">TataJuba 1,720 lbf (7,650 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"45\"><span class=\"chart__label\">Cambara 1,730 lbf (7,562 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"54\"><span class=\"chart__label\">Tigerwood 2,160 lbf (17,500 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"57\"><span class=\"chart__label\">Cuban Laurel 2,340 lbf (10,390 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"58.75\"><span class=\"chart__label\">Jatoba 2,350 lbf (25,100 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"72\"><span class=\"chart__label\">BloodWood 2,900 lbf (12,900 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"72\"><span class=\"chart__label\">Itauba 2,900 lbf (12,900 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"76\"><span class=\"chart__label\">Angelim Pedra 3040 lbf (17,600 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"78\"><span class=\"chart__label\">Angelim Vermelho 3,160 lbf (14,050 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"80\"><span class=\"chart__label\">Massaranduba 3190 lbf (29,290 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"88.5\"><span class=\"chart__label\">Cumaru 3540 lbf (25,580 N)<\/span><\/li>\n<li class=\"chart__bar\" data-skill=\"90\"><span class=\"chart__label\">Ipe 3680 lbf (25,860 N)<\/span><\/li>\n<\/ul>\n<\/div>\n<div class=\"text-content\">\n<p><strong><span style=\"color: #000000;\">How hard is wood ?<\/span><\/strong><\/p>\n<p><strong><span style=\"color: #000000;\">How is it determined ?<\/span><\/strong><\/p>\n<p><strong><span style=\"color: #000000;\">What does the test consist of ?<\/span><\/strong><\/p>\n<p><strong><span style=\"color: #000000;\">These are just a few questions that might come up when you hear about how hard a wood is. <\/span><\/strong><\/p>\n<p><strong><span style=\"color: #000000;\">The fact is not many people understand the testing, and even fewer look to improve upon it. The Janka Scale has done a good job in giving a broad reference to relative hardness. The thing it has solved is some of the issue\u2019s that have evolved from it.<\/span><\/strong><\/p>\n<h2 style=\"text-align: left;\"><strong><span style=\"color: #000000;\">Here\u2019s how the Janka test works:<\/span><\/strong><\/h2>\n<ol>\n<li style=\"text-align: left;\"><strong><span style=\"color: #000000;\">A small steel ball 11.28mm (.444 in) is placed on a board. <\/span><\/strong><\/li>\n<li style=\"text-align: left;\"><strong><span style=\"color: #000000;\">Pressure is then applied to the ball until it sinks half of its width into the piece of wood. <\/span><\/strong><\/li>\n<li style=\"text-align: left;\"><strong><span style=\"color: #000000;\">When the ball reaches the halfway point the test is completed and the results recorded.<\/span><\/strong><\/li>\n<li style=\"text-align: left;\"><strong><span style=\"color: #000000;\">For consistency reasons the test is conducted on a flat grain instead of the sides or ends.<\/span><\/strong><\/li>\n<\/ol>\n<h2><strong><span style=\"color: #000000;\">Problems With the Janka Test ?<\/span><\/strong><\/h2>\n<p><strong><span style=\"color: #000000;\">As good as the Janka test is for a \u201cgeneral idea\u201d it does have some issues. Anyone who spends a lot of time around hardwood knows how much grain can vary. The variance in that grain changes the hardness. A small steel ball only tells one small story, about one small part, of one small piece of wood. Within a single piece of decking it is conceivable that there could be several different strengths. Another problem is wood have a hard section (autumnal growth) of grain and a softer (spring growth) section in which the piece isn\u2019t being tested as a whole unit.<\/span><\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The Janka Scale for our hardwood species Andiroba 1,220 lbf (5,430 N) Taurai 1650 lbf (7339.56 N) Garapa 1700 lbf&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-327","page","type-page","status-publish","hentry"],"translation":{"provider":"WPGlobus","version":"3.0.3","language":"de","enabled_languages":["en","es","de","fr","ru","br"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"es":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"br":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/pages\/327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/comments?post=327"}],"version-history":[{"count":0,"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/pages\/327\/revisions"}],"wp:attachment":[{"href":"https:\/\/advantageflorestal.com.br\/de\/wp-json\/wp\/v2\/media?parent=327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}