窓ガラスの火災時の飛散とその危険度

概要

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When the fire breaks out in a building with many windows setting normal plain glass, especially in high storied building, the window glass will be broken and the pieces will scatter everywhere. In this case, we think these broken pieces will inflict injuries on persons.The authors report on the scattering of window glass in fire. Two testing houses are masonry construction of light-weight concrete blocks, the both size are about 2×2×1.8m, one of houses is built on 4m height, other is built on 18m height.Steel sash setting normal plain glass (2 or 3mm thickness) is built in the front window. The firewood is piled up to amount of 35kg/m2 in the house and set on fire. The results of scattering of broken pieces are as follows ;1. In case of 4m height to the top of window, as the distance to ground from window is not great and the wind was breeze at testing time, so scattering area was small. The broken pieces almost fell within horizontal distance 2m from the window. Fine piece scattered to 5m range.2. In case of 18m height to the top of window, as the distance to ground from window is great, so scattering area was wide. The broken pieces almost fell within horizontal distance 7m from window under condition of the wind velocity 3m/sec, and within 9m under 8m/sec. But fine piece scattered to 11m range under condition of the wind velocity 8m/sec.
日本火災学会の論文