Under what circumstances is the enclosed staircase
4, underground stores and set up dance entertainment entertainment venues of the underground building (room), the ground floor for the 3-storey and 3-storey or underground floor and outdoor entrance floor height difference is less than or equal to 10m, should be set up closed staircase between;
5, 12 and 18 storey residential units should be closed staircase.
6, 11 and 11 floors below the corridor-style residential should be closed staircase;
7, garage, repair garage indoor evacuation stairs should be set up closed staircase.
8, the following public places of the civil air defense project, when the ground is two layers, and the second floor of the ground floor and outdoor entrance floor height difference of not more than 10m, should be set up closed staircase.
1) cinema, auditorium;
2) hospitals, hotels with a building area greater than 500m2;
3) shopping malls, restaurants, exhibition halls, public places of entertainment and small sports venues with a building area of ??more than 1000m2.
What is the case of closed staircase under normal circumstances are private houses set into a closed, that is the whole house is a family of people.
If everyone is not a public into a closed.
The following circumstances can be set up closed staircase
1, high-rise plant and A, B, C multi-storey building should be set up closed staircase or outdoor stairs.
2, high-rise warehouse should be set up closed staircase.
3, the following public buildings of the indoor evacuation staircase should be closed staircase (including the first floor to expand the closed staircase) or outdoor evacuation stairs:
1) hospital, nursing home ward;
2) hotels;
3) More than 2 storey shops and other staff-intensive public buildings;
4) set up a song and dance entertainment show entertainment venues and the building layer of more than 2 layers of the building;
5) More than 5 other public buildings.
