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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク National Hardwood Lumber Association ： ウィキペディア英語版 National Hardwood Lumber Association The National Hardwood Lumber Association is an American hardwood lumber grading group. It was founded in 1898〔http://www.nhla.com/ourroles〕 to standardize the grades for hardwood lumber. Previously, lumber was graded by lumber mills on an individual basis, and there was no standardization between mills. From 1898 to 1932, the NHLA based its lumber grades on the number and size of visual imperfections in a given piece of lumber. In 1932, it changed its standards to grade based on clear cutting sizes. The grade is determined by "the proportion of a piece that can be cut into a certain number of smaller pieces of material, commonly called cuttings, which are general clear on one side, have the reverse side sound, and are not smaller than a specified size."〔 ==General== As the creators of North Americas commonly used lumber grading system, the NHLA has involved itself heavily in the education and certification of lumber inspectors. It also serves as a tool for communication and promotion for hardwood producers, consumers, and equipment manufacturers.The NHLA advocates for the hardwood industry, provides services and expertise to the industry, and promotes networking between groups interested in the profitable production of hardwood and related products.〔(【引用サイトリンク】title=Hardwood & Softwood Lumber )〕〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National Hardwood Lumber Association」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.