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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 Brettstapel ： ウィキペディア英語版 Brettstapel Brettstapel is a massive timber construction system, fabricated exclusively from softwood timber posts connected with hardwood timber dowels. It is a relatively simple method of construction that exploits low grade timber, not normally suitable for use in construction, to form load bearing solid timber wall, floor and roof panels. Brettstapel works by using hardwood dowels with a moisture content lower than that of softwood posts. Over time the dowels expand to achieve moisture equilibrium thus 'locking' the posts together and creating a structural load-bearing system. It is one of a few construction methods that can be entirely fabricated from timber. Although some variations do still use glue and nails, these are not necessary and avoiding these means a healthier indoor air quality can be achieved. The timber itself locks in vast amounts of carbon dioxide without emitting harmful toxins found in other materials, benefiting both the user and the environment. ==History== Brettstapel was invented in the 1970s by the German engineer Julius Natterer〔 Essay on Julius Natterer in (English ) and in (German ), 2014 〕 and is now commonly used across Austria, Switzerland and Germany, whilst slowly emerging in the UK. Originally it consisted of low grade timber posts continuously nailed together to form panels strong enough to support mines and railways. In 1999 a German company developed a doweled system which relied on the varying moisture content to form solid structural panels however many companies introduced glue to the system to strengthen it. In 2001, a new variant of Brettstapel was developed where diagonal dowels replaced the perpendicular ones thus resolving separation issues and allowing for longer spans. Presently only one company uses the diagonal dowel system whilst all except for two (who still use nails) use perpendicular dowels, mostly without glue. There are now a range of companies producing CLT cross laminated timber (rotating layers of boards) using timber dowels based upon Brettstapel.〔"(Brettstapel.org )", 2010〕 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「Brettstapel」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.