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                                                                                                                                                                                                                                      木材品種 : 云杉--鐵杉
                                                                                                                                                                                                                                           云杉-松-鐵杉由四種樹種組成:白云杉、英格曼云杉、小干松和阿爾卑斯鐵杉組成。所有這些樹種皆能生產高等級木材,木節相對較小、緊密。云杉-松-鐵杉樹種所生產的木材在市場上一起作為SPF推廣。
                                                                                                                                                                                                                                      云杉-松-鐵杉木材明顯為白木材,春木和秋木之間顏色差別非常小。木材外觀明亮、潔凈,顏色由白色到淺黃色不等,紋路細微筆直、質地光滑。
                                                                                                                                                                                                                                      用途
                                                                                                                                                                                                                                      云杉-松-鐵杉窯干木材作為結構性框架材料用于所有類型的建筑中:住宅、商業、工業和農業。
                                                                                                                                                                                                                                      云杉-松-鐵杉窯干木材還廣泛用于制造預制房屋、桁架和其它結構組件。除了生產高質量結構材以外,只要經過些微準備,云杉-松-鐵杉還可以制成精美而經濟的實木家具。
                                                                                                                                                                                                                                      產品
                                                                                                                                                                                                                                      結構材、桁架、預制房屋、外部露臺、防腐處理桿、鐵路枕木和室外家具。
                                                                                                                                                                                                                                      技術規格
                                                                                                                                                                                                                                      云杉-松-鐵杉木材在窯干爐內可統一干燥至含水率為19%或以下。窯干可防止木材的天然污點,提高強度和剛度,強化外觀并增強抗腐爛和蟲害能力。
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                      性能和耐用性
                                                                                                                                                                                                                                      一、木材與水分
                                                                                                                                                                                                                                          木材不像其它的建筑材料,木材具有釋放或吸收水分的能力。木材的含水量總是與空氣濕度成正比,木材最終在自然調節達到濕度穩定。
                                                                                                                                                                                                                                      甚至在最潮濕的氣候下,若設計得當的話,木框架結構的建筑能表現出良好的功能。
                                                                                                                                                                                                                                          大多數建筑標準要求木材的含水量在19%或低于19%。這個含水量已經很低,木材沒有機會發霉,收縮或變形的可能也很小。室內使用的木材含水量一般在8%-14%之間,而室外使用的木材的含水量則在12%-18%之間。
                                                                                                                                                                                                                                      當潮濕或濕度大時,木材吸收水。當干燥期間,木材就釋放水分。在正常的使用情況下,木材的含水量在其一生中將會經歷與季節相關的溫度和濕度的變化。
                                                                                                                                                                                                                                      一些戶外應用,比如像甲板和走廊,就應該使用防腐木,和天然仿佛的西部紅柏這樣的木材。加拿大BC省是開發高壓防腐木材處理產品技術的領導者,可以提供在任何潮濕環境下性能可靠的木材。
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                      二、能效
                                                                                                                                                                                                                                          總結每種設計在這20年來的對能源的具體消耗,再把這些全部的結果和木結構耗能相比,顯示鋼結構和混凝土結構的設計:
                                                                                                                                                                                                                                         · 比木結構多消耗12%和20%的能源;
                                                                                                                                                                                                                                         · 比木結構多釋放15%和29%的溫室氣體;
                                                                                                                                                                                                                                         · 比木結構多產生10%和12%的污染空氣;
                                                                                                                                                                                                                                         · 比木結構多排放3倍和2.25倍的污水;
                                                                                                                                                                                                                                         · 從資源利用來看,分別比木結構多使用7%和50%的資源,而產生的固體廢物比木結構分別多6%和16%。
                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                      三、耐火性
                                                                                                                                                                                                                                           對所有的建筑來說,無論是混凝土結構,鋼結構還是木結構,火災都是一種威脅。通常建筑物里的東西如地毯,窗簾和家具最先燃燒,這也就是說,和建筑結構組成相比,火災安全隱患更多地取決于住戶的生活習慣。
                                                                                                                                                                                                                                           多數國家的建筑標準規定,居民建筑群要使用阻燃的建材,在一段時間內,以防火,煙和熱量從墻和地面一個單元竄到另一個單元,同時也要求確保建筑結構的整體性得到維護。
                                                                                                                                                                                                                                          木結構墻體,地板和屋面都采用傳統的木框架,木桁架和I型木龍骨,設計時,其耐火阻燃高達2個小時。符合非易燃建材防火安全的等級。
                                                                                                                                                                                                                                          鋼筋在大火中強度減弱迅速坍塌,而重木的耐火能力要比鋼筋強得多。在許多方面,大型木材耐火能力相當于鋼筋混凝土。木頭的傳熱能力比鋼筋小400倍,比混凝土小8.5倍。
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