Glass Knowledge

In recent years, glass curtain wall in the city at all levels of construction projects are widely used. The picture shows the construction of a landmark in Huaying City, the external walls of a large area of gold glass curtain wall. Newspaper special correspondent Qiu Haiying photo

Why should strictly control the use of glass curtain wall? Provincial Office of the relevant person in charge said that a large area of the use of glass curtain wall, is not conducive to energy conservation and environmental protection, there are security risks.

(Xinhua Xiong Xiaowei) whole body covered with glass curtain wall office, hotel ... ... this popular architecture in Sichuan was "halted." (Hereinafter referred to as the "notice"), clearly put forward no special requirements of the construction works, in principle, shall not use a large area of glass curtain wall.

"Notice" does not prohibit the use of glass curtain wall, but to prohibit the use of large areas of glass curtain wall, the use of glass curtain wall, the use of glass curtain wall, "Large area" how to define? The official said that there is no uniform quantitative standards, will be implemented in accordance with the specific circumstances to determine.

Why should strict control of the use of glass curtains? Provincial Office of the relevant person in charge said that a large area of the use of glass curtain wall can easily lead to the city side of the building, while not conducive to energy conservation and environmental protection, there are security risks.

Provincial Investigation and Design Review Center, said the relevant person in charge said last year, the Ministry of Housing and other departments issued a notice to require the new residential, hospital outpatient emergency building and ward building and other seven types of buildings shall not be used in the second floor and above the glass curtain wall; It is forbidden to use full-concealed glass curtain wall. Provincial Office of the relevant person in charge said that "notice" is a combination of Sichuan situation to further deepen the request. Planning and construction administrative departments at all levels will ensure that the relevant requirements are in place through the inspection of construction plans and the examination of construction plans.

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How has the security of the glass curtain wall built? Expert advice -

"Old" glass curtain wall should be compulsory physical examination

□ reporter Xiong Xiaowei

Security issues, is the province to stop building a large area of the use of glass curtain wall of the important reasons. But on the built glass curtain wall, how to do?

Wang Jintai (a pseudonym) to face such a problem. As a head of a high-rise buildings in Chengdu Bayao Street, in recent years she has found a five-story glass curtain wall cracks. August 8, the reporter saw the floor 21 floor, cracks have a thumb width, about 0.5 meters long. Is now sticky live. "Property can only see the window near the bottom of the wall and the situation, there is no cracks in other places or even fall do not know.

This is not a case. Public reports show that, including Sichuan, including the provinces have emerged due to curtain wall glass loss caused by damage, wounding events. One of the inspection bodies of the construction drawings in our province, Wu Guangyong, head of the curtain wall area of Chengdu Guangyi Technology Consulting Co., Ltd. Estimates that the glass curtain wall used in Sichuan is more than 10 million square meters, and the potential risks will not be less.

Why is the glass curtain wall falling? According to China's relevant technical specifications, glass curtain wall design life of 25 years. "To the years, the curtain wall itself and the connection may be aging, resulting in air leakage, leakage or even fall off.

How to avoid falling? Live and build the Department of "glass curtain wall engineering technical specifications" has long been the answer: curtain wall project completed and accepted a year later, the curtain wall works should be a comprehensive inspection; thereafter every 5 years should be checked once. Housing Construction Department "both building curtain wall safety maintenance management approach" more clearly, the glass curtain wall safety maintenance implementation of the owners responsible system. "In addition to quality defects, the acceptance of the glass curtain wall drop after the resulting casualties, the owners have to pay compensation." Sichuan Junhe law firm lawyer Ma Qu said.

But the rules have not been strictly enforced. Wang Jintai admits that the cost of testing more than 10,000 yuan, the replacement of the curtain wall needs 2 million yuan, they managed the building in the glass curtain wall has never been tested, "the owners are basically not willing to pay.

Provincial Building Science Research Institute is responsible for the glass curtain wall testing Fan Wei also said that one year commissioned only about 10 single test, mostly from state-owned enterprises and government departments.

To solve the problem, Chengdu has tried. The relevant departments of the city before and after the arrival of the flood season, will issue a notice to urge the relevant owners to strengthen the inspection and organize the security investigation; require personnel-intensive business center, in the glass curtain wall below the area set up a reasonable area of green belt isolation, or use eaves, Anti-impact awning and other protective facilities. In the long run, the provincial metal structure industry association expert group leader Sun Yan that the relevant departments should introduce a policy, requiring the expiration or expiration of the glass curtain wall for compulsory testing, "like the annual car to the mandatory annual inspection.

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Who will replace the glass curtain wall

□ reporter Xiong Xiaowei

In the 1990s, the first batch of large-scale use of glass curtain wall in Sichuan completed the building, is regarded as "modern" model. 20 years later, has been able to see a large area of glass curtain wall, in Sichuan took the first step out of the stage of history.

It gradually withdraw, which industries will be pushed to the front? In turn related to the industry what kind of impact?

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Will it bring disruptive changes to the construction industry?

Or change the current popular architectural modeling, to the stone, metal curtain wall industry to bring new opportunities

China Building Southwest Design and Research Institute Co., Ltd. Building curtain wall design and research center chief engineer Dong Biao introduction, at present, more than Bacheng high-rise, high-rise buildings will be extensive use of glass curtain wall. "Halt" this widely used technology, whether it will give the architectural form, and even the construction industry to bring subversive changes?

"That will not." China Construction Southwest Design and Research Institute Co., Ltd. executive director Zheng Yong said, "notice" does not prohibit the use of glass curtain wall. The construction industry has begun to explore a few years ago with stone curtain wall, metal curtain wall instead, only the use of glass curtain wall. In recent years the completion of the new library of the provincial library, Tianfu New Town, Feng Feng office buildings, are stone and glass curtain wall and the way to build. This is the stone, metal curtain wall industry is a new opportunity.

At the same time, the New Deal is conducive to building energy conservation insulation, to prevent light pollution. Provincial Institute of Building Science Professor Yong said that a large area of glass curtain wall light reflection effect is obvious, will affect the vision and driving safety. Dong Biao introduced in the same budget premise, the glass curtain wall insulation performance is lower than the stone, metal curtain wall. The former to achieve and the latter similar thermal insulation properties, the price will be twice as high.

New Deal will also bring challenges. Glass curtain wall technology is relatively mature, both light transmission, material stability, weather resistance and other advantages, the weight is only half of the stone curtain wall. Dong Biao that if the ban on large areas of the use of glass curtain wall, to solve the high-level, especially 150 meters above the high-rise building lighting, load control and shock resistance and other issues, the difficulty is not small. "It is not to say that the existing technology can not solve, but may lead to increased costs, lower comfort." Provincial Metal Structure Industry Association expert group leader Sun Yan said that the New Deal objectively limits the architectural design concept and shape, or will change the current popular Of architectural modeling.

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Will a stick kill the curtain wall glass industry?

Will not affect the survival of the industry, but will accelerate the survival of the fittest and transformation

New Deal will directly affect the product supply side - curtain wall glass industry.