From the experimental data, how many years can the light steel villa live?

I often see some companies promoting the life span of light steel villas in advertisements, some are 100 years, some are 200 years, and some are 300 years. What is the basis? I believe that many people also agree and reprint each other, but I don't know why. In fact, what the advertisement should say is the main body of the light steel villa - the service life of the light steel keel. You must know that the light steel villa is composed of the light steel keel and other auxiliary materials that wrap the keel. The life of the steel Long, especially the steel treated by galvanizing or galvanizing, the service life of the general steel is much longer! However, the service life of those auxiliary materials such as oriented structural board, thermal insulation cotton, one-way breathable film (breathing paper), exterior wall materials (ecological wood-plastic board, cement fiber board, PVC board, calcium silicate board, etc.) is different, the same The service life of materials must be different in different regions, different salinity, different humidity, different temperatures, and different lighting times. Therefore, it is also unscientific to say that the service life of the entire light steel villa is inaccurate. The relatively short lifespan of light steel villas is the same as that of traditional buildings. They are all exposed to the exterior decoration layer. After decades of wind and sun exposure, the exterior wall decoration materials will have corresponding aging and fading. But the service life of light steel keel can be determined. The earliest existing galvanized light steel house is in the United States. It was made in 1921 and has survived nearly 100 years of ups and downs. Although the auxiliary materials have been replaced or repaired many times, we can basically determine the light steel. The service life of the keel. The development of modern science and technology also proves the corrosion resistance of the now popular galvanized steel sheet from another point of view, and the destructive salt spray test can explain it all. Based on the above data, we can theoretically estimate that the life of light steel villa galvanized steel is 2-6 times that of hot-dip galvanized steel. Whether it is 2 times or 6 times, it depends on the environment. To help planners make choices when planning, experts have drawn up simple and clear forms. You can refer to the 'Steel Structure Material Equipment Application Manual' published on November 18, 2006. There are specific regulations on the annual consumption of galvanized steel surface coating: Some people see this data and say that using 150g/㎡ galvanized steel plate, the annual consumption in the village atmospheric environment is 1.3g/㎡, 150/1.3 ≥115 years. That's right, in theory, AZ150 galvanized sheet can be corroded for more than 100 years. The rational development of the light steel villa (house) industry requires our active participation, so that the advantages of light steel villas can be presented to potential house builders in an impartial manner.

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