Why are most ordinary houses in America made of wood?

This is a very popular building in Europe and America, and it has many advantages.

1, cheap, easy to cover and repair. Although the United States is developed, there are many poor people and the cost of living in cities is high. Many Americans actually spend their money very carefully. The labor cost in Europe and America is very high, so we can only save as much as possible from other aspects. The United States has a vast territory and a sparse population, with fast growth of trees, a serious surplus of wood, and an oversupply of wood, which is quite cheap. Cheap is self-evident, easy to cover, easy to repair and easy to understand. You can find some online videos, that is, use some high-quality and tough light wooden boards and strips, shoot nails everywhere, and the main structure can be built in a few days, without foundation and reinforced concrete, and the bearing capacity is quite good. Look at the Forbidden City in China. It's a brick-wood structure with good seismic performance. After more than 600 years, it is still standing and easy to maintain.

2, electrical insulation, warm in winter and cool in summer. Wood is a good electrical insulator with low conductivity. Under the same thickness, the thermal insulation value of wood is 3 times higher than that of solid brick wall building, 6 times higher than that of standard concrete, 400 times higher than that of steel and 0/600 times higher than that of aluminum. In addition, the interior of the wooden villa is composed of poor thermal conductors such as gypsum board and glass wool. , making the wooden villa a relatively closed space, less affected by the external climate. Therefore, the wooden villa is like a natural air conditioner. Reasonable design and layout, moderate absorption of sunlight, living in a wooden villa feels like spring all the year round, warm in winter and cool in summer, naturally very comfortable.

3, earthquake resistance, good wind resistance. The wood structure has great toughness, and because the box structure of the wood structure villa is equally stressed, the structure is light, the elastic recovery ability is strong, and the resistance to instantaneous impact load and periodic fatigue damage is strong, so the earthquake force absorbed in the big earthquake is small, and the structure can recover on its own elasticity without collapsing when the foundation is displaced. In western advanced countries, there is a very mature method of building wood structures, which can be built quickly and stably. Even if it is blown away by a few meters in the strong wind, the wooden house is basically intact. Of course, even reinforced concrete buildings with deep foundations can't resist tornadoes. It's just that there are many tornadoes in central America. The good thing is that it is made of light wooden boards and often has a basement. There are few casualties every year, and the construction cost is cheap. Build another one. If reinforced concrete is used, the death toll may increase greatly. So it's not that they don't want to live in reinforced concrete houses, but because wooden houses can reduce the damage to other buildings or people when super tornadoes are destroyed.

4. Strong corrosion resistance and durability. You may find it strange to say it. Isn't wood resistant to corrosion? Actually, it depends on the specific situation. There are many high-quality wood in Europe and America. After strict screening and treatment, when the equilibrium moisture content of wood is lower than 19%, it is difficult for insects to survive. However, the average moisture content of wood used to build wooden villas is only 65,438+07%, and special pathogen-free anticorrosive materials, insect nets and drugs are sprayed around the foundation to stop the invasion of termites and keep the house away from these insects. In the United States, wooden houses over a hundred years old can be seen everywhere.

5. Strong fire resistance. This wall combination has strong fire resistance due to the decorative structure of fully enclosed fire-resistant gypsum board. Gypsum board can not only naturally adjust the indoor and outdoor humidity, but also feel like spring all the year round, warm in winter and cool in summer when living in a wooden villa, which is naturally very comfortable. When the equilibrium moisture content of wood is lower than 19%, insects cannot survive. However, the average moisture content of the wood used to build wooden villas is only 65,438+07%, and it does not contain specific pathogens. Anti-corrosion materials, insect nets and drugs are sprayed around the foundation to stop the invasion of termites and keep the home away from these insects. The living and living functions in the villa are complete; Good sound insulation, privacy and best comfort are incomparable to traditional brick-concrete structure. This is one of the reasons why there are signs of success in North America so far.

6. Anti-reconciliation. Because the wooden house is relatively light as a whole, there is basically no settlement.

7, conducive to environmental protection. Many people may find it strange that cutting down trees in large numbers is environmentally friendly. In fact, many people have a superficial understanding of the concept of environmental protection. The so-called environmental protection does not mean that we must absolutely protect and never move, but we must maintain the ecological balance. Of course, too little can't be moved, and too much should be reduced appropriately. The United States is just a country with a vast territory and a sparse population. Trees grow fast, there is a surplus of wood, and the supply exceeds the demand. There is basically no need to worry about vegetation extinction. On the contrary, people who have studied forestry management should know that too dense trees are not conducive to growth. Moreover, wood is easy to handle and can be directly thrown into the forest, becoming a nest for many creatures, which is conducive to maintaining ecological diversity. Waste wood will rot in a few years and return to nature, becoming fertilizer for plants. However, reinforced concrete is difficult to treat and cannot be degraded for hundreds of years. Of course, multi-storey buildings still need reinforced concrete. After all, the wooden structure cannot be built too high.

The situation in China is completely different. China has little vegetation and fragile ecology. Nowadays, environmental protection is strongly advocated, and cutting down trees is increasingly prohibited. Traditionally, wooden houses are used by poor people, and China people have a good face and like tall things. Moreover, people in China often live together as a big family, which will be handed down from generation to generation. Moreover, there are many typhoons and earthquakes, so it must be durable, so only a large number of reinforced concrete can be used. Moreover, especially in rural areas, self-built houses are all traditional pouring methods, and they don't know any seismic design at all. Look at the earthquake zone. Many houses are like this. They are easy to die, difficult to move and difficult to save people. Moreover, it has to be said that domestic policies have higher requirements for wooden buildings and the procedures are very troublesome. If you want to build a wooden villa with several floors, many departments may not be able to do it, so many people simply give up.