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本帖最後由 黑色的狗 於 2012-8-3 14:00 編輯
NFPA 72 National Fire Alarm Code
A.5.7.5.2 For the most effective detection of fire in high-rack storage areas, detectors should be located on the ceiling above each aisle and at intermediate levels in the racks. This is necessary to detect smoke that is trapped in the racks at an early stage of fire development when insufficient thermal energy is released to carry the smoke to the ceiling. Earliest detection of smoke is achieved by locating the intermediate level detectors adjacent to alternate pallet sections as shown in Figure A.5.7.5.2(a) and FigureA. 5.7.5.2(b). The detector manufacturer’s recommendations and engineering judgment should be followed for specific installations.
A projected beam–type detector can be permitted to be used in lieu of a single row of individual spot-type smoke detectors. Sampling ports of an air sampling–type detector can be permitted to be located above each aisle to provide coverage that is equivalent to the location of spot-type detectors. The manufacturer’s recommendations and engineering judgment should be followed for the specific installation.
NFPA 72美國國家消防報警法規
A.5.7.5.2 高架倉庫最有效的火災探測方式是將探測器配置於貨架上方的天花板以及貨架的中間層,這是為了有效探測滯留在貨架間的煙霧(因為火災早期釋放的熱能並不足夠使煙霧粒子上升至天花板)。將測探測器配置於相鄰貨盤兩側的位置,如圖A.5.7.5.2(a)及A.5.7.2(b)可達到最早期的煙霧偵測效果。
………………(中間略)
空氣採樣式探測器的採樣孔可被設置於貨架上相當於點型探測器的位置。特定的安裝應參考製造商的建議及工程判斷。
圖A.5.7.5.2(a) 密閉式貨架 圖A.5.7.5.2(b)開放式貨架
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