Double layer fireproof glass is composed of two layers of fireproof glass. Composite fireproof glass has long been widely used in Europe and many other countries in the world. It plays a great role in thermal insulation, heat insulation and sound insulation. With the increase of society's awareness of building energy conservation, double-layer fireproof glass is particularly important in construction. Briefly explain the matters needing attention of double-layer fireproof glass.

Composite fireproof glass shall be provided with at least 2 pieces of glass easy to be broken urgently on each layer, and the distance shall not be greater than 20m.

Window box type and shaft type double-layer fireproof glass shall be provided with at least one glass easy to be broken urgently in each interlayer unit.

The area of each easily broken glass shall not be less than 1.2m2, the width shall not be less than 1.0m, and obvious signs shall be set.

Another point is that double-layer fireproof glass curtain wall should not be set on the side exterior wall of the fire climbing surface of high-rise buildings.

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