According to the code for fire protection design of high-rise civil buildings, the entrance door of high-rise residential buildings should not be directly opened to the front room. When there are difficulties, some entrance doors to the front room should be Class B fire doors. There should be no steps inside and outside the evacuation exit door within the range of 1.40m, and the door must be opened outwards without setting a threshold.
Public evacuation doors of high-rise buildings should be opened in the direction of evacuation, and sliding doors, hanging doors and revolving doors should not be used.
The door of the automatic switch should have a manual opening device. Doors in the front room and stairwell should be Class B fire doors and should be opened in the direction of evacuation.
The residential gate is the outermost sign of the separation of internal and external space, that is, the tuyere. China's traditional four directions, southeast and northwest, are symbolized by peacock, snake turtle, dragon and white tiger. The gate facing south is Zhuque Gate, the gate facing north is Xuanwu Gate, the gate facing east is Qinglong Gate, and the gate facing west is Baihu Gate. The formula means "former Suzaku, later Xuanwu, left Qinglong, right White Tiger".