4.1.1 Stairwell design should be in line with the current national standards "building design fire code" (GBJ16) and "high-rise civil building design fire code" (GB50045) of the relevant provisions.

4.1.2 The net width of the stairway section should not be less than 1.10 m. Six floors and six floors of residential, one side of the stairway section with a balustrade should not be less than 1 m.

Note: the net width of the stairway section refers to the horizontal distance between the wall to the center of the handrail.

4.1.3 Stair tread width should not be less than 0.26m, tread height should not be greater than 0.175m. handrail height should not be less than 0.90m. Staircase horizontal balustrade length is greater than 0.50m, the height of the handrail should not be less than 1.05m. staircase balustrade vertical bars between the headroom should not be greater than 0.11m.

4.1.4 Staircase platform width should not be less than the staircase section width. Less than the net width of the stair section, and shall not be less than 1.20m. Stairway platform of the lower edge of the structure to the vertical height of the walkway should not be less than 2m. entrance to the floor and the outdoor ground should have a height difference, and should not be less than 0.10m.

4.1.5 Stairwell net width greater than 0.11m, must take measures to prevent children from climbing and slipping.

4.1.6 Seven floors and above, or the entrance floor of the residence from the outdoor design floor height of more than 16m above the ground level of the residence must be equipped with elevators.

Note: 1 Multi-storey dwellings with the ground floor used as stores or other rooms must be provided with elevators when the height of the floor of the entrance level of the residents from the outdoor designed ground level of the building exceeds 16m.

2 Multi-storey residence whose ground floor is used as elevated floor or storage space must set up elevator when the floor of its entrance level is more than 16m away from the outdoor design ground height of the building.

3 When the top floor is a two-story set of leaping type residence, the part of the leaping floor does not count the number of floors. The top floor of the entrance floor of the residents from the building's outdoor design floor height does not exceed 16m, may not have an elevator.

4 The middle floor of the residence has a direct access to the outdoor ground entrance and fire escape, the number of floors can be calculated from the middle floor.

4.1.7 Twelve floors and above the high-rise residential, each building should not be less than two sets of elevators, which is appropriate to configure a stretcher can accommodate the elevator.

4.1.8 high-rise residential elevator is appropriate to set up a station on each floor. When the residential elevator is not a station on each floor, the number of floors without a station should not exceed two. Tower and corridor type high-rise residential elevator should be arranged in groups. Unit-type high-rise residential units only one elevator per unit should be used to contact the corridor connection.

4.1.9 Waiting hall depth should not be less than the depth of the largest elevator box, and shall not be less than 1.50m.

4.2 corridor and entrance/exit

4.2.1 corridors, inner patio and roof and other air space in the net height of the railing, low-rise, multi-storey residential should not be less than 1.05m, medium-high-rise, high-rise residential should not be less than 1.10m, the railing should be designed to prevent children from climbing. Design should prevent children from climbing, vertical bars between the clearance should not be greater than 0.11m.

4.2.2 High-rise residential corridors for the main passageway should be closed corridor, and openable windows. The net width of the corridor should not be less than 1.20m.

4.2.3 Residential public **** entrances and exits are located in the balcony, corridors and open staircase platforms in the lower part, should be taken to set up a rain cover and other safety measures to prevent objects from falling and injuring people.

4.2.4 Residential public **** entrances and exits should be identified signs; can be set up by household mailbox. The public **** entrances and exits of high-rise residences should have a foyer, management room and mail room.

4.2.5 Residential public **** entrances and exits with elevators should be equipped with wheelchair ramps and handrails when there is a height difference.

4.3 Garbage Collection Facilities

4.3.1 Garbage ducts should not be provided in dwellings. When multi-storey residential buildings are not equipped with garbage pipes, appropriate facilities shall be provided according to the way of garbage collection. When mid-rise and high-rise dwellings are not provided with garbage pipes, a closed garbage collection space should be provided on each floor.

4.3.2 When garbage pipes are installed in the residence, the following requirements shall be met:

1 The garbage pipes shall not be arranged adjacent to the bedrooms and living rooms (halls);

2 The effective cross-section of the garbage pipes shall not be smaller than the following:

1) 0.40m×0.40m for multi-story residences;

2) 0.50m×0.50m for medium and high-rise residences;

2) 0.50m × 0.50m;

3) 0.60m × 0.60m for high-rise dwellings;

3 The garbage hopper and the door of the garbage hopper should be corrosion-resistant and close tightly;

4 The top of the garbage pipe should be passed out of the roof, and the bottom of the garbage should be equipped with closed garbage room.

4.4 Basements and Semi-basements

4.4.1 Dwellings should not be arranged in basements. When arranged in a semi-basement, measures must be taken for lighting, ventilation, sunlight, moisture control, drainage and safety protection.

4.4.2 Basement, semi-basement for storage, bicycle storage and equipment rooms, the net height shall not be less than 2m; as a car garage, should be in line with the current industry standards, "automobile garage building design specifications" (JGJ100) of the relevant provisions.

4.4.3 Basement, semi-basement should take waterproof, moisture-proof and ventilation measures; light wells should take drainage measures.

4.5 Ancillary public ****use rooms

4.5.1 Strictly prohibit the arrangement of stores, workshops and warehouses in residential buildings that store and use items with fire hazards of A and B, and should not be arranged to produce noise, vibration and pollution of environmental sanitation of the stores, workshops and recreational facilities.

4.5.2 Residential buildings should not be arranged in the restaurant, when the conditions require the arrangement of the kitchen chimneys and exhaust ducts should be higher than the residential roof, air conditioning, refrigeration equipment and processing machinery should be vibration, muffling treatment, and should meet the requirements of environmental protection provisions of the relevant requirements.

4.5.3 Residential buildings should not be arranged in the boiler room, transformer room and other noise and vibration sources and other equipment rooms. If the conditions are limited by the need to arrange, should be consistent with the current building fire, building sound insulation and related professional standards.

4.5.4 The entrances and exits of residential and attached public **** rooms should be arranged separately.

5 Indoor Environment

5.1 Daylighting, Natural Lighting, and Natural Ventilation

5.1.1 At least one living space of each residence should be able to obtain daylight, and when the total number of living spaces in a residence is more than four, it is desirable for two of them to obtain daylight.

5.1.2 The living space to obtain sunlight requirements, the sunlight standards should be consistent with the current national standards "urban residential planning and design code" (GB50180) on the residential building sunlight standards.

5.1.3 Residential daylighting standards shall be in accordance with the provisions of Table 5.1.3 values