China Construction Metal Structure Association, deputy head of the expert group, Professor Xue fat told reporters that the steel structure building in western developed countries is very mature architecture, introduction of China has, steel structure building has been more and more recognized. Not long ago, CCTV new site fire is the case, it is understood, fire and lead to serious consequences not in the steel structure itself, but fire protection problem, in such a situation, what kind of structure may happen by accident. The events of September 11 have shocked the world, twin towers is also typical of steel structure building. As a matter of fact, early in the design, the architects will have to account of terrorist attacks, regardless of the thickness of steel, or fire retardant paint selection is very strict, but make them by surprise, that the impact of the aircraft is too large due to the quality of their own, but also contained a large amount of fuel. We can not because of unexpected events and a denial of an architectural structure or building materials. 

     The different requirements of the environment to the steel structure are different, such as in the sea, to the steel structure anticorrosion performance requirements are higher than in the normal environmental corrosion resistance requirements. In the process, can take the galvanized way, in addition, you can also use special steel etc.. Steel structure itself is a kind of material with cut off the fire, the temperature refractory is 450 degrees Celsius, namely when the temperature below 450 degrees Celsius, does not change the strength of the steel structure, when the temperature in more than 450 degrees Celsius, steel structure bearing capacity will lose a lot; when temperatures above 600 degrees Celsius, steel structure basic loss of bearing capacity. In fireproofing, steel structure building with a variety of options, such as the building itself well fire prevention measures, and spraying facilities after the fire to the fire control in the local. In the fire design, can be in the surface of steel structure fire retardant coating, spraying fire retardant paint, steel structure wrapped up. In addition, you can also choose to thick steel. Steel structure in fire is a set of system. After calculation can determine the fire-resistant time of different types of steel, the foreign done very well, abroad in the fire first consider the safety, followed by consideration of property security, therefore in the calculation of steel of the refractory time, first consider this time my wife is able to run to safety. In foreign countries, is the first building fire protection system, after the construction of the main building. According to the use of the building, the security level is not the same. As long as the steel structure construction according to design specification, in general, even if the fire will not collapse.