Although composite fire-proof glass has been widely used in construction, there are still many blind areas in China's current standards, such as how to accurately use composite fire-proof glass, what type of composite fire-proof glass to use, and which parts can use composite fire-proof glass. At the same time, many construction units, planning units and construction units have misunderstandings in understanding and application. They think that only the use of composite fire-proof glass can be used as fire separation, and only the partition wall made of composite fire-proof glass can reach the fire resistance limit. Our supervisors also have many vague understandings about this in their usual approval and inspection, and do not know how to master it.

Although the composite fireproof glass has a long history before application, there are still some questions that can not be ignored in practice and supervision:

1. Composite fireproof glass and composite fireproof glass partition wall are not divided

Some buildings need both fire separation and beautiful and transparent when planning, and the composite fire-proof glass partition wall will be solved as a fire separation method, such as the partition wall of boutiques in the functional commercial pedestrian street, the glass firewall in the large commercial space, the viewing window of the viewing shaft, etc. However, the planners usually only mark the composite fire-proof glass on the drawing instead of the composite fire-proof glass partition wall, while the fire reviewers usually only propose to mark the composite fire-proof glass partition wall for several hours, and do not ask the planners to clarify the detailed node construction method drawing of the composite fire-proof glass partition wall. In practical construction, the common practice is that the construction party pleads for the purchase of composite fire-proof glass according to the plan, fixes the composite fire-proof glass in the structure according to the general practice of glass partition wall, seals the glue in the center, and briefly thinks that the splicing of composite fire-proof glass is the composite fire-proof glass partition wall, which meets the fire-fighting demand, The inspection statement of composite fireproof glass shall be submitted during inspection. All these neglect that the composite fireproof glass partition wall is composed of composite fireproof glass, structure, sealing materials, cushion blocks and other fireproof components, which is a complete system. Composite fireproof glass is only the composition of composite fireproof glass partition wall. It is necessary to combine equipment with inlaid structure and fireproof sealing materials to form composite fireproof glass partition wall and reach the corresponding fire resistance limit standard.

2. Questions needing attention when adding spray protection to composite fireproof glass

Relevant experiments at home and abroad have shown that the selection of appropriate water spray system protection can effectively extend the time of single composite fireproof glass to reach the loss of thermal insulation and street irradiance, and extend the fire insulation time to ensure personnel dispersion. At present, many of these plans are used in the functional planning of large commercial pedestrian streets, and the heat insulation effect is achieved by the protection of non heat insulation single composite fireproof glass water spray system. The most important thing in this kind of engineering practice is the water distribution effect of spray protection. As the experiment shows that once the spray protection is lost, the single composite fireproof glass will soon lose the effect of smoke and fire prevention. However, there are many questions in the planning and construction. For example, some shops at both ends of the commercial pedestrian street directly make the decoration appearance on the composite fireproof glass, which affects the water distribution effect of the sprinkler; Some put the sprinkler equipment under the decorated brand door, which affects the sprinkler heat collection; Some door head equipment forms a shelter between the composite fireproof glass and the nozzle; Some construction units did not set the pipeline of the spray protection system alone and shared the same pipeline with other sprays, resulting in that the spray water volume and duration could not reach the planning requirements; Some construction units use the wrong type of sprinkler. There are many questions similar to the above. In short, during construction, it should be ensured that the sprinkler can timely and effectively protect the composite fireproof glass for separation, which should be paid attention to.

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