活动房屋是一种结构简易,拆装灵活,搬运方便的临时性构置物,为国防、油田、地质、铁路、施工等野外作业不可缺少的设施。又由于活动房屋具有结构轻,抗震性能好的优点,因此,又深受地震地区的欢迎。随着城市建设的发展,作为临时周转房,需要量也日益增加。目前我国已有许多地区生产不同类型的活动房屋,如北京市木材厂就年产6000幢。但从近年的情况来看,不仅数 Mobile homes are temporary structures that are simple in structure, flexible in dismantling, and convenient to carry. They are indispensable facilities for field operations such as national defense, oil fields, geology, railways, and construction. Because of the advantages of light structure and good anti-seismic performance, mobile homes are also welcomed by earthquake regions. With the development of urban construction, the demand for temporary accommodation has also increased. At present, there are many regions in China that produce different types of mobile homes. For example, the Beijing Timber Factory produces 6,000 units annually. But judging from the situation in recent years, not only