一、综述据有关部门预测,今后十五年我国将建造城镇住宅约25亿m~2,商业、旅游宾馆、饭店等公共建筑约10亿m~2,工业建筑约8亿m~2,乡村建筑123亿m~2,房屋建造总量约为165亿m~2,约需建筑门窗30亿m~2以上。自1979年国家明令全面节约木材之后,大部分地区执行情况良好,不少省、市严禁在一般房屋住宅中使用木门窗,此后钢门窗发展起来。1983年 I. Overview According to the forecast of relevant departments, in the next 15 years, China will build about 2.5 billion m 2 of urban residential buildings, about 1 billion m 2 of commercial buildings, tourist hotels and restaurants, and 800 million m 2 of industrial buildings. The building is 12.3 billion m2, and the total housing construction is about 16.5 billion m2, which requires about 3 billion m2 of building doors and windows. Since the State explicitly ordered timber conservation in 1979, most regions have performed well. Many provinces and cities have forbidden the use of wooden doors and windows in ordinary houses. Since then, steel doors and windows have been developed. 1983