| 摘要 |
PROBLEM TO BE SOLVED: To secure the safety of an evacuee, and to prevent the spread of flame by preventing any heat crack to be generated when a non-fire generation side plate glass is rapidly cooled by water-spraying for fire fighting, and preventing the splash of glass pieces shattered due to the heat crack, and preventing the intrusion of the flame for preventing the spread of flame due to outdoor fire in an adjacent area at the opening part or door of a building. SOLUTION: The peripheral edge parts of two faced glass plates are held to a fixed interval by a spacer, and the surrounding is sealed with sealing materials, and hydrous gel is filled in the inner space so that fireproof glass can be constituted. One of the glass plates is made of heat-resistant tempered glass whose surface compression stress is at least 150 MPa or more so that the tempered glass plate can be prevented from being broken due to water- spraying from the other broken glass plate side at the time of high temperature heating due to flame.
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