Focus: Glass curtain wall facing "danger period"

The curtain wall glass crashed into pieces and frightened pedestrians

Glass curtain wall facing "dangerous period"

Experts recommend building should be equipped with instructions

At noon on September 8th, Zhongguancun e-World Digital Plaza was full of broken glass on the side of Block C. It scared the pedestrian, Mr. Pan, to worry about it: “What if a big piece of glass falls down entirely? What if you are carrying someone?” In this regard, the building The property explained that the building is replacing the glass curtain wall and protective measures have been taken and no one has been injured.

The glass curtain wall fell from about 11 floors of the building. There was also an empty window on the wall. It was about 2 meters high and about 1 meter wide. The two construction ropes hang down to the ground along the glass curtain wall of the building. Metal frames are scattered on the broken glass and a cordon is drawn around. “Before the glass fell, it was already on the cordon, and the staff kept reminding the pedestrians to take care of the avoidance.” A nearby store employee stated that the building was undergoing construction at the time of the incident and the construction party had already taken protective measures in advance.

The employees of the shop were confirmed by the building property. Workers are currently replacing the broken glass walls of the building. Because part of the glass curtain wall is located on the outside of the cement wall, workers cannot remove the entire glass from the building, so they are forced to use the floor. The method of breaking the glass was broken, but the glass was cracked a little, and the cordon was pulled up in advance, so it wasn't shouting at people. Despite this, Mr. Pan still has a lingering fear on the façade of these façade curtains that look fabulous, because he has seen the news that the curtain wall glass has hurt people more than once.

In fact, as early as 2005, the Beijing Municipal Committee of the Jiusan Society issued an early warning when it was advising the city to carry out a screening survey on the hidden dangers of glass curtain walls. According to the requirements of the industry regulations on the quality guarantee period of curtain wall projects for 10 years, the glass curtain walls that the city started to construct since the 1980s, In particular, the lifetime of hidden glass curtain walls built in the 1990s has passed the 10-year warranty period and there are potential safety hazards.

Zheng Shi, head of the Science and Technology Quality Department of the Beijing Academy of Architectural Design and Research, told the reporter that the reason for the shedding of glass screens is various, which may be due to the glass blew, or it may be the problem of the glue or connecting parts. The “Technical Rules for Architectural Design of Beijing Municipality” compiled by the institute stipulates that Beijing shall not allow the use of structurally-adhesive glass-enclosed full-frame glass curtain walls. Strictly speaking, it is difficult to completely prevent the individual units of the glass curtain wall from being broken or even detached. However, measures must be taken to prevent shedding and wounding. In addition to guaranteeing the quality of the glass screen, a green shelter must be provided under the awning and curtain wall at the entrance. Wait.

It is worthwhile for all parties to pay attention to the fact that many structural adhesives used in existing glass curtain walls have exceeded their useful life of 10 years and must be re-financed by companies with professional qualifications for testing and maintenance. Actually, regarding the requirements for the maintenance and inspection of glass curtain walls, the competent departments of the Ministry of Housing and Construction and other relevant professional standards have all clearly stipulated, but the implementation is generally poor, which is related to the lack of safety knowledge in the property and property sectors. . In fact, in the event that the glass curtain wall has caused problems, the property and property rights departments must also bear the corresponding responsibility, in addition to the curtain wall contractors. If the city wants to establish a long-term mechanism for the safety management of glass curtain walls, the relevant departments shall issue corresponding management policies and make specific provisions for the maintenance and repair mechanism.

Zheng Shi also pointed out that although the overall life span of the building can reach more than 50 years, the service life of such parts as glass curtain walls and roof waterproofing layers is far less than this number, which is like a new car must be regularly sent to the 4S after its delivery. The shop shall maintain and replace parts and components. Therefore, the building should also be equipped with a “Building Instructions for Use” including the “Maintenance Instructions for Curtain Walls,” which clearly stipulates the use of the building as a whole, the use of all parts, and maintenance warranty periods. .