标准号:IS 4021-1983
发布日期:1984/2/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard lays down the requirements regarding material, construction, workmanship and sizes of timber door, window and ventilator frames generally used in residential buildings, offices, schools, hospitals, etc.1.2 This standard does not cover timber door, window and ventilator frames for industrial and other special buildings, such as workshops and garages.