内装材が初期の火災性状に及ぼす影響（模型実験の一般報告）

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タイトル別名
  • Effect of Internal Linings on Spread of Fire at Its Early Stage —General Results on Model Study—
  • 内装材が初期の火災性状に及ぼす影響
  • ナイソウザイ ガ ショキ ノ カサイ セイジョウ ニ オヨボス エイキョウ

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The purpose of this work is to investigate the effect of the interior lining material on the rapidity of fire spread in a compartment. The work was commenced with model.<br>A cubical box (50×50×50cm) made of pearlite board was used as a model compartment. It has two similar openings at the opposite sides and the size of the opening was changed as follows:<br>a) fully open   b) 1/2 open   c) 1/4 open   d) 1/8 open<br>Weight of fuel consumed was measured by suspending compartment from a cantilever beam to which strain gauges were fixed. Temperature inside the box at the intersection of diagonal on the plan a quarter of the height below the ceiling was measured.<br>Fire was started at one corner of the compartment and the time from ignition to flash over was measured. This duration of time is reduced more as the area of the opening becomes smaller, so long as its area is not so small that the combustion cannot be continued in the compartment.<br>When combustible untreated interior lining was finished on the wall and the ceiling of the compartment, duration of this time is reduced compared with the case where no lining is used. The quantity of this reduced time varies according to dimension of the opening : the larger the area of the opening is, the larger this quantity becomes. That is to say, fire hazard due to the combustible untreated internal linings, can be expected more in the compartment with high ventilation than the one with low ventilation.

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