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Volume 12 (1962 - 196･･･
- Issue 2 Pages 31-
- Issue 1 Pages 1-
Volume 12, Issue 1
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Paper
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Sizuo YOKOI1962 Volume 12 Issue 1 Pages 1-5
Published: 1962
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSThe 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.
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:
a) fully open b) 1/2 open c) 1/4 open d) 1/8 open
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.
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.
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.View full abstractDownload PDF (471K) -
Tamotsu HARADA, Kenji MIGITA, Toyokazu SHIIRE, Kunio SHIINA1962 Volume 12 Issue 1 Pages 6-24
Published: 1962
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSThis is the study on fire damages caused by the fire at the factory of Yokohama Bridge Stone Tire Company on the 20th January in 1961; thermal stress of which is, at the same time, calculated.
The factory of reinforced concrete is five stories high and its plane is 31M 50cm × 151M 08cm.
The fire broke out on the fifth floor. The Foam Rubber storing there had been burning for more than five hours.
The heating (Time-Temperature-curve) for the constructing member is considered almost standard one in Japan, corresponding to the second class heating of J. I. S. A. 1302.
The thermal stress is 30 T. M. at the columns of the both sides of total span. It is 18 T. M. at the beams of the frame. The said matters, in all cases, are much more over than the calculated stress of member by usual method.
As the results of our investigating afterfire, it was discovered that there happened many large cracks or exfoliations of concrete in beams and columns. Many places of slabs and beams were impossible to use again because of fire damages, and had to start over again to manufacture.View full abstractDownload PDF (3054K) -
Minoru HAMADA, Kenichi USUI, Yoshiyasu ISAWA, Takao WAKAMATSU1962 Volume 12 Issue 1 Pages 25-30
Published: 1962
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSHOKKAIDO Prefectural Office and each municipality in HOKKAIDO committed fire risk investigation and fire scheme of each city to Japan Fire Protection Science Association. We handled ten cities : OTARU, YUBARI, KUSHIRO, OBIHIRO, RUMOI, TAKIGAWA, MURORAN, KITAMI, IWAMIZAWA and ABASHIRI ; two cities every year since June, 1957.
In previous report (Bull. of. the Fire Prevention Society of Japan Vol. 11 No.1), we published a treatise on the fire risk and fire scheme of eight cities except IWAMIZAWA and ABASHIRI. Here is a treatise of two cities, IWAMIZAWA and ABASHIRI, investigated after the publication of 1st report.
It is defined in previous report for the process of the fire investigation and fire scheme.
The details of the results are exemplified by the latter part of this paper.View full abstractDownload PDF (506K)
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