The new version of "Ningbo Residential Design Implementation Rules" will be implemented from now on. All residential elevators should reach the underground garage.

The 2020 edition of the Detailed Rules for the Implementation of Residential Design in Ningbo (hereinafter referred to as the Detailed Rules) takes effect today. From now on, all projects that submit construction drawing review documents are required to be constructed in accordance with the Detailed Rules. Among them, the design requirements of road settlement control in residential areas are put forward for the first time in China; Residential elevators are required to meet all design specifications, such as underground garage, sound insulation of windows/floors on urban main roads, and electric load reserve in advance, which are leading in China. ?

Define the waterproof design requirements of roof and external wall?

Detailed provisions are made in the Detailed Rules for the Waterproofing Design of Roofs and Exterior Walls, such as "The design service life of exterior wall waterproofing works of residential buildings shall not be less than 25 years", "The leveling layer of exterior wall shall be provided with separation joints, the vertical spacing shall not be greater than 6m, the horizontal spacing shall not be greater than 4m, the joint width shall be 8 8- 10/0mm, and the sealing material shall be caulked", "The waterproof layer of exterior wall shall extend to the door and window frame (the waterproof layer covers the outer periphery of the door and window openings of exterior wall).

Clear household electricity load?

At present, due to the inconsistent requirements of residents' electricity load configuration, circuit tripping exists in some communities. Combined with the current situation, the implementation rules clearly put forward the load distribution standard for residents, and reserved the power load in advance. ?

According to the "Implementation Rules", the residential load distribution is divided into four grades: the building area is less than 90 square meters, and the electricity load is 8 kilowatts per household; The construction area is 90- 120 square meters, and the electricity load is per household 10 kw; Building area120-140m2, electricity load 12kw/ household; The building area is greater than 140m2, and the starting point of electricity load is 15kW/ household. ?

Every elevator in the residential building?

Should lead to the underground garage.

According to the regulations issued on 20 18 in our city, at least one elevator serving residential buildings should lead to the underground garage. "In this revision, we investigated the design requirements of other cities in combination with residents' demands, and improved the design standards for Ningbo residential elevators to reach underground garages, requiring that every elevator in residential services should lead to underground garages. "The relevant person in charge of the Science and Technology Department of the Municipal Housing and Construction Bureau said. ?

Improve the sound insulation standards of external walls, doors, windows and floors?

Houses on both sides of roads, especially those on both sides of main roads and viaducts, are often "harassed" by road noise. At the same time, incidents of neighborhood disputes caused by poor floor sound insulation performance are not uncommon. ?

"In the provincial standard" Technical Specification for the Application of Building Doors and Windows ",the minimum requirement for sound insulation of urban external windows is' the external windows on the street side within 50 meters on both sides of the main road are not less than 30 decibels, and the secondary roads are not less than 25 decibels'. We have perfected this requirement, requiring that the air sound insulation performance of external doors and windows on the street side within 50 meters on both sides of expressways and main roads should not be less than 35 decibels; The air sound insulation performance of the external doors and windows on the street side within 50 meters on both sides of the secondary trunk road and branch road should not be less than 30 decibels. " Relevant experts from the Science and Technology Department of the Municipal Housing and Construction Bureau said. ?

For the floor sound insulation value, the relevant national and provincial standards are "the minimum requirement for floor impact sound insulation is less than 75 decibels, which can be reduced to 85 decibels when the reserved floor is improved". ?

Relevant experts from the Science and Technology Department of the Municipal Housing and Construction Bureau said: "The Implementation Rules issued this time stipulate that the floor impact sound insulation of fully renovated houses should be less than 65 decibels. The lower the sound insulation value of impact sound, the better the sound insulation effect of impact sound. 65 decibels is a high standard requirement in the national sound insulation standard. " ? Settlement control of new residential design road? Due to road subsidence in some residential quarters, the outdoor ground of residential quarters is deformed, which affects the normal use of roads and pipelines. The problem of road settlement belongs to the field of municipal specialty, which is not stipulated in the national standard "Code for Residential Design" and the provincial standard "Standard for Residential Design". ?

The implementation rules are problem-oriented, sum up the actual case experience, and refer to the settlement control of highway engineering, and put forward control requirements for key indexes such as allowable post-construction deformation value of subgrade, backfill material, compactness of subgrade, and rebound modulus of subgrade top surface that affect the settlement of residential areas. ? "This revision is the first time that China has put forward strict requirements for road settlement in residential areas, which is highly targeted and applicable to soft soil foundation areas in our city." Relevant experts from the Science and Technology Department of the Municipal Housing and Construction Bureau said that, for example, the requirement that the allowable post-construction deformation value of subgrade is not more than 20 cm means that the cumulative pavement settlement of the road should not exceed 20 cm within the designed service life. ?

The "Implementation Rules" clearly states that the post-construction deformation of residential outdoor ground shall not affect the normal use of roads and pipelines. At the same time, it is stipulated that the pavement settlement of general sections should not exceed 30 cm, the pavement settlement of basement entrances and exits should not exceed 10 cm, the pavement settlement of abutment and embankment should not exceed 20 cm, and the contact with the main building should not exceed 5 cm. ?

First inclusion?

Electric bicycle charging, fire protection and other requirements?

"Previously, we commissioned the Municipal Property Association to investigate the 15 residential quarters delivered in our city in recent years, and found that the ratio of the number of electric bicycles to motor vehicle parking spaces was high, ranging from half to 1.5 times. Therefore, when formulating the implementation rules, we require the number of motor vehicle parking spaces to be no less than 80%, and considering the safety requirements, we put forward the relevant person in charge of the Science and Technology Department of the Municipal Housing and Construction Bureau. ?

According to reports, relevant requirements include "fire hydrant system should be installed in electric bicycle parking places", "automatic sprinkler system should be installed", "the configuration of building fire extinguishers should be implemented according to Class A fire protection requirements", "the ventilation frequency of underground (or semi-underground) electric bicycle parking places should be 2-4 times per hour", "relevant fire alarm facilities should be equipped" and "video monitoring system should be installed". ?

Clean the exhaust pipe in the basement?

Set control rules?

The determination of the location of the basement exhaust duct directly affects the air quality of residential quarters, and the detailed implementation rules put forward clear and specific control regulations to make the air in residential quarters fresher. ?

The "Implementation Rules" stipulates that the exhaust duct should be attached to the main building for high-altitude centralized discharge, and it is not allowed to discharge directly from the ground or the outer wall of the highest natural floor; When there is no main building in the range of 20m in front of the ground or 20m in the side15m or 0m in the rear10m, and there is no building window above the exhaust duct, the exhaust duct can be attached to the building annex or ancillary building, or independently attached to the above-ground building; When the horizontal distance between the exhaust port and the personnel activity place is less than10m, the height from the bottom of the exhaust port facing the personnel activity place to the ground of the personnel activity place should not be less than 2.5m..