A chimney
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A few place originally points at the phenomenon that ground functions like a chimney for the outbreak of the ascending current of air by the fire in the chimney on the structure of the building with (a chimney) or the chimney embodiment elephant (chimney addition and subtraction occur) a chimney.
Because facilities connecting the lower layer and the upper air such as a colonnade or stairs are easy to wake up these phenomena, it depends on various disaster prevention standards, and it is pointed out that it is a dangerous act to leave inflammables unattended to these facilities mainly.
In the high-rise buildings, it is apt to be thought that an emergency staircase or the elevator shaft may cause these phenomena, but these facilities do not easily make it a chimney because there are "the moratorium on flammable building material" and "imposition of the fire prevention door setting" by safety standards in the disaster prevention in the case of a fact.
However, as a result of having done a product to a big pile to the front and the emergency staircase of the fire prevention door in the past building fires (the combustibility), this chimney embodiment elephant occurs, and there is the example which damage enlarged.
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This article is taken from the Japanese Wikipedia A chimney
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