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GB 50352-2019 (GB50352-2019)

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GB 50352-2019: PDF in English

GB 50352-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
Uniform standard for design of civil buildings
ISSUED ON: MARCH 13, 2019
IMPLEMENTED ON: OCTOBER 1 01, 2019
Issued by: Ministry of Housing and Urban-Rural Development of the People's
Republic of China;
General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China.
Uniform standard for design of civil buildings
1 General provisions
1.0.1 In order to meet the "applicable, economic, green and beautiful building" principles
for civil buildings, to meet the basic requirements of safety, sanitation and environmental
protection, and to unify the general design requirements of various civil buildings, this
standard is prepared.
1.0.2 This standard is applicable to the design for new construction, extension and
renovation of civil building.
1.0.3 In addition to the implementation of relevant national laws and regulations, civil
building design shall also meet the following requirements:
1 The relationship between people, architecture and the environment shall be properly
addressed in accordance with the principles of sustainable development.
2 Ecological environment must be protected to prevent environment pollution and
destruction.
3 People orientation shall be adopted to meet the physical and spiritual needs of people.
4 Basic national policies of saving land, energy, water and raw materials shall be
implemented.
5 The design shall meet the requirements of the local urban and rural planning and
coordinate with the surrounding environment. It should reflect the regional culture and
times features.
6 As for the building and environment, the disaster prevention safety measures such as
fire prevention, earthquake resistance, flood prevention, air defense, wind, snow and
thunder resistance shall be adopted comprehensively.
7 Barrier-free (accessible) facilities shall be provided in indoor and outdoor
environments to facilitate the use of handicapped people.
8 All construction involving famous historical and cultural cities, towns, villages,
historical and cultural blocks, cultural relics protection units, historical buildings, scenic
spots and natural reserves shall comply with the provisions of relevant protection
2 Terms
2.0.1 civil building
the general term of the building for people living and public activities
2.0.2 residential building
building for people to live and use
2.0.3 public building
building for people to conduct various public activities
2.0.4 accessibility facilities
service facilities to ensure safe passage and convenient use of personnel, and to be
constructed in conjunction with civil construction projects.
2.0.5 construction site
site for the construction project, which is determined according to the nature of the land
and the use of ownership
2.0.6 boundary line of roads
boundary line of land for urban roads (including residential area roads)
2.0.7 property line
boundary line for the land use rights of various types of construction projects
2.0.8 building line
boundary line that the planning administrative department separately defines and the
main body of a building (structure) above the ground shall not extend beyond within the
boundary line of roads and construction land boundary
2.0.9 building density; building coverage ratio
the ratio (%) of the total area of the foundation of the building to the total land area within a
certain land area
2.0.10 plot ratio; floor area ratio
the ratio of the total area of the building to the area of the land within a certain land use
and floor use range
2.0.11 greening rate
the ratio (%) of the total area of various types of green space to the total area of the land
(%) within a certain land use area
2.0.12 insolation standard
2.0.22 ramp
ramped traffic passage for pedestrians and vehicles connected to indoors or outdoors
floors or grounds of different elevations
2.0.23 railing
protective partitioning member for securing personal safety or separating spaces with a
certain safety height
2.0.24 stair
building component consisting of steps for continuous walking, rest platforms, and rails for
safety maintenance rails (or breast board), and corresponding support structures and for
vertical traffic between floors
2.0.25 deformation joint
structural joint preserved to prevent the building from being exposed to external factors,
additional deformation and stress generated inside the structure which causes to be
cracked, collided or even destroyed, including expansion joints, settlement joints and
anti-seismic joints
2.0.26 building curtain wall
building peripheral retaining wall consisting of the panel and the supporting structural
system (supporting device and supporting structure), which can have a certain
displacement capacity relative to the main body structure or has a certain deformation
capability, and does not bear the action of the main structure
2.0.27 suspended ceiling
ceiling suspended under the roof or slab structure of the house
2.0.28 pipe shaft
vertical hoist-way in a building for arranging vertical equipment pipeline and equipment
2.0.29 smoke uptake; smoke flue
pipes and shafts that emit various flue gases
2.0.30 air shaft
pipelines and shafts that exhaust indoors bad gas or transmit fresh air
2.0.31 decoration; finishing
detailed processing and artistic processing of the interior and exterior spaces of the
building based on the main structure of the building
2.0.32 daylighting
measures to make natural illuminance obtained for the space inside the building meets
the requirements of use, safety, comfort, and aesthetics, in order to ensure that the living,
4 Planning control
4.1 Urban planning and city design
4.1.1 Control indicators such as the land use nature, plot ratio, building density,
greenbelt rate, building height of for construction projects and annual runoff total control
rate of its construction base shall conform to the relevant provisions of the local controlled
detailed planning.
4.1.2 Architecture and its environmental design shall meet the requirements of the urban
/ rural planning and the urban design in the respect of the control and guidance on the
local target orientation, spatial form, landscape and environmental quality, and shall meet
the design control requirements of urban design for public space, architectural groups,
landscape, municipal and other environmental facilities.
4.1.3 Architectural design shall be stressed in the integration and coordination of
architectural group space and natural landscape environment, the protection and
development of historical culture and traditional features, the organization and shaping of
public activities and public space, and shall meet the following requirements:
1 The shape, volume, scale, color and spatial combination of buildings shall be
coordinated with the surrounding spatial environment;
2 The architectural style, height and interface, etc. of buildings in the important interface
control section of cities shall be coordinated with the buildings in the adjacent building
bases.
3 The construction site, green planting, landscape structures and environmental
embellishment, municipal engineering facilities, landscape lighting, marking system and
public art within the construction base shall be designed and coordinated with the
buildings and their environment.
4 Permeable pavement should be adopted for roads, parking lots and hard ground in the
construction base:
5 The outdoor open space and walking system of the building base and adjacent
building base buildings should be connected with each other.
4.2 Construction base site
4.2.1 The construction base shall be adjacent to urban roads or township roads,
otherwise, connecting roads shall be set up and shall meet the following requirements:
entrances and exits shall not be set within 70.0m from the red line intersection of roads.
2 The nearest edge line from pedestrian crossing, pedestrian overpass and pedestrian
underpass (including approach roads and approach bridges) shall not be less than 5.0m;
3 The distance from the subway entrance, public transportation platform edge shall not
be less than 15.0m;
4 The distance from the nearest edge of the entrance and exit of parks, schools and
buildings used by children, the elderly and the disabled shall not be less than 20.0m.
4.2.5 Bases for building like large and oversize transportation, culture, sports,
entertainment, commerce and other densely populated construction shall meet the
following requirements:
1 The total length of the building base adjacent to the urban roads shall not be less than
1/6 of the perimeter of the building base;
2 The number of entrances and exits of the construction base shall not be less than 2
and they should not be set on the same urban road.
3 In front of the main entrance and exit of the building, a personnel distribution site shall
be set up, and its area and length and width shall be determined according to the nature
of use and the number of people.
4 If greening, parking or other structures are set up in the construction base, there shall
be no obstacle to the distribution of personnel.
4.3 Building surface eruption
4.3.1 Except for arcade buildings, building connection, subway-related facilities
and municipal public facilities such as pipelines, pipe trenches and pipe corridors
connecting cities, buildings and the following ancillary facilities shall not be built in
a way that protruding out of boundary line of roads or property line:
1 Underground facilities, shall include supporting piles, underground diaphragm
wall, basement floor and its foundation, septic tanks, all kinds of pools, treating
pond, settling pond and other structures and other ancillary facilities, etc.:
2 The above-ground facilities shall include porch, corridor, balcony, outdoor
staircase, bay-window, air conditioning unit, awning, overhanging eaves,
decorative framework, fixed sunshade, steps, ramp, framed flower bed, wall,
platform, water apron and open trench, basement air inlet and outlet, basement
entrance and outlet, water-collecting well, light well, chimney, etc.
5 Site planning
5.1 Architectural composition
5.1.1 The architectural composition shall enable the rational shunt of people, traffic
and logistics in the building base to prevent interference of them, and shall be conducive
to firefighting, parking, personnel distribution and accessibility facilities.
5.1.2 Building interval shall meet the following requirements:
1 Building interval shall meet the requirements of the current national standard GB
50016 Code for fire protection design of buildings as well as the local urban planning
requirements;
2 Building interval shall meet the requirements of natural lighting for building houses in
Subclause 7.1 of this Standard, and the building and site with sunshine requirements shall
meet the requirements in the relevant insolation standards of the country.
5.1.3 Architectural composition shall prevent and resist disasters such as cold, summer
heat, high winds, heavy rain, snow and dust according to the regional climate
characteristics, and ventilation by using natural air flow shall be used to prevent adverse
microclimate.
5.1.4 According to the location, direction and intensity of noise sources, comprehensive
measures in building functional zoning, road layout, building orientation, distance, terrain,
greening and barrier function of buildings shall be taken to prevent or reduce
environmental noise.
5.1.5 Sanitary distance between buildings and different pollution sources shall conform
to the requirements of the current relevant sanitary standards of the country.
5.1.6 Architectural composition shall ensure the protection of cultural relics and ancient
and famous trees to avoid damage in accordance with relevant national and local
regulations.
5.2 Road and hard standing
5.2.1 Base roads shall meet the following requirements:
1 Speed limit facilities shall be set up on the vehicle road at the junction of the base road
and urban road, and the roads shall be accessible to the safety exit of the building;
2 Walkways accessible to streets and inner yard shall be built for the building along the
garage and the connecting road within the construction base. The buffer section shall start
from the hillslope of the garage entrance / exit ramp and meet the following requirements:
1 The turning radius of the entrance / exit buffer section and the connecting roads within
the base should not be less than 5.5 m;
2 If the entrance / exit is perpendicular to the base road, the buffer section shall not be
less than 5.5 m in length;
3 If the entrance / exit is parallel to the base road, the entrance / exit has a buffer section
not less than 5.5 m in length before accessing the base road;
4 When the entrance /exit is directly connected to the urban road outside of the base, its
buffer section should not be less than 7.5 m in length.
5.2.5 Outdoor motor vehicle hard standings shall meet the following requirements:
1 Parking lot shall meet the drainage requirements, and its drainage slope shall not less
than 0.3%;
2 The entrance / exit of a hard standing shall be designed in a way to avoid crossed
vehicle travel;
3 A hard standing shall have accessible parking spaces, and their requirements and
number shall meet the current national standard GB 50763 Codes for accessibility design;
4 Reasonable vegetation with trees for sunlight shading shall be designed for hard
standings.
5.2.6 The quantity of entrances / exits for outdoor motor vehicle hard standing shall meet
the following requirements:
1 If the number of parked vehicles is 50 and below, one entrance / exit may be set up
and it should have the two-way travel function;
2 If the number of parked vehicles is 51 to 300, two entrances / exits shall be set up and
they should have the two-way travel function;
3 If the number of parked vehicles is 301 to 500, two entrances / exits shall be set up
with the two-way travel function;
4 If the number of parked vehicles is more than 500, three entrances / exits shall be set
up and they should have the two-way travel function;
ground drainage.
5 The design elevation of the site should be more than 0.2 m higher than the level of the
lowest municipal road section surrounding this site; if the municipal road elevation is
higher than the base elevation, the measures shall be taken to prevent foreign water from
entering the base.
6 The design elevation of the site shall be higher than the highest multi-year
underground water level.
7 As for a base with a large area or more complex terrain, its architectural composition
shall make the amount of earth and stone works minimized by reasonable use of the
terrain and make a balance between filling and excavation.
5.3.2 The road design slope within the building site shall meet the following
requirements:
1 The longitudinal gradient of the motor vehicle road in the base shall not be 0.3% ~ 8%;
if the slope is larger than 8%, the slope length shall not be higher than 200.0 m. If the
slope gradient is smaller than 0.3% in case of special difficulty, effective drainage
measures shall be taken; on special sections, the slope gradient shall not be larger than
11%, and its length shall not be larger than 100.0 m; in snow or frozen areas, the slope
gradient shall not be larger than 6%, and its length should not be larger than 350.0 m; the
transverse gradient should be 1% to 2%.
2 The longitudinal gradient of non-motor vehicle road in the base shall not be smaller
than 0.2%, and its maximum longitudinal gradient should not be larger than 2.5%; in a
difficult case, it shall not be larger than 3.5%; for a maximum longitudinal gradient of 3.5%,
the slope length shall not be larger than 150.0 m; the transverse gradient should be 1% ~
2%.
3 The longitudinal gradient of the base walkway shall not be 0.2% ~ 8%, on the snow or
frozen area, it shall not be greater than 4%; the transverse gradient shall be 1% to 2%;
step walk shall be built if it is greater than the limit gradient.
4 Accessible passage shall be set up in the main areas where the crowd flows within the
base.
5 The designed longitudinal gradient of the road in the base in a mountainous or rolling
region may be relaxed and shall meet the requirements of relevant local standards or be
approved by local relevant authority.
5.3.3 The surface drainage for construction site shall meet the following requirements:
on soil, comprehensive pipelines, loading of landscape and plant growth.
3 Water-proofing structure for building shall be root penetration resistant.
5.5 Layout of pipeline engineering
5.5.1 Pipelines should be laid underground; the engineering pipelines laid overhead and
the facilities for them must meet the requirements of fire-fighting vehicle transit and rescue,
not interfering with the normal activities of ordinary vehicles and pedestrians, and avoiding
the impact on buildings and landscapes.
5.5.2 For the engineering pipeline connected with the municipal pipe network, its plane
position and vertical elevation shall be designed based on the unified urban coordinate
and elevation systems.
5.5.3 The laying of the engineering pipeline shall not affect the safety of the building and
prevented from damages due to corrosion, subsidence, vibration, external load, etc.
5.5.4 Comprehensive layout of pipelines shall be taken according to the characteristics
and requirement of them, and integrated pipe gallery should be used. Pipelines with the
requirements on safety, hygiene and interference protection shall not be laid on the same
ditch or in a close way. The pipelines with mutual interference shall be in different ditches
(rooms) of the comprehensive pipe gallery.
5.5.5 The direction of the underground engineering pipelines should be parallel or
vertical to the main direction of road or building. Pipelines shall be laid at a depth from
shallow to deep in the direction from building to road. Main pipes should be arranged on a
side of major user or a side with relatively more branches; engineering pipelines shall be
laid with smaller length and less turning, avoiding crossing with road, railway, river course,
trench and other pipelines; in a difficult case, the crossing angle shall not be less than 45°.
5.5.6 The pipelines parallel to a road should not be arranged under car lane; if needed,
the pipelines with larger depth of burial and less renovation may be laid under car lane.
5.5.7 The horizontal and vertical clear distance and burial depth of the engineering
pipelines, and the horizontal clear distance between the engineering pipelines and the
building (structure) and greening trees shall meet the requirements of the relevant
national standards. If it is difficult to meet the requirements due to the planning and the
restriction by the current situation, the minimum horizontal clear distance may be reduced
properly upon the safety measures are taken.
5.5.8 Outdoor engineering pipelines in the regions with a seismic precautionary intensity
of 7 degree and above, permafrost regions, cold regions, collapsible loess regions and
expansive soil regions shall meet the requirements of relevant national standards.
6 Architecture design
6.1 Determining of rate number of users
6.1.1 For the building indicating the number of users like the number of user seats, the
width of the supporting facilities, exit passageways, stairs and safety exits shall be
calculated based on the rate number of users.
6.1.2 For the building indicating no rate number of users, the reasonable number of
users shall be determined according to the current relevant national standards or through
investigation and analysis, and based on this value, the width of supporting facilities, exit
passageways, stairs and safety exits shall be calculated.
6.1.3 If various places in a multi-functional public building share the same exit at the
same time, the width of the safety evacuation exits and the evacuation stairs shall be
calculated according to the accumulative number of users at all the places in the
horizontal direction. In the vertical direction, for over-ground construction, the width of
safety evacuation stairs on the floors below the one with the largest number of users shall
be calculated based on the floor with the largest number of users, while for underground
construction, the width of safety evacuation stairs on the floors above the one with the
largest number of users shall be calculated based on the floor with the largest number of
users.
6.2 Layout design
6.2.1 The layout of the building shall be made proper and flexible in consideration of the
building use nature, function, process and other factors.
6.2.2 Based on the function of the building, the natural conditions like solar radiation,
lighting, ventilation and landscape shall be made good use with respect to the use space.
Interference of sight line shall be prevented for the rooms with privacy requirements.
6.2.3 Building entrance / exit shall be set according to the requirements on site
conditions, building functions, traffic organization, safety evacuation and others.
6.2.4 The layout design of building in seismic region should be neat.
6.3 Storey height and interior clear height
6.3.1 Building storey height shall be determined by use function, technological
requirements, technical and economic conditions of building and other factors, and meet
the requirements of current relevant national standards for building design.
buildings.
6.4.7 Habitable room shall not be arranged in basement; if habitable rooms are arranged
in the semibasement, the measures must be taken to make them meet the requirements
on lighting, ventilation, solar radiation, moisture, mildew, security and other aspects.
6.5 Equipment floor, refuge storey and open floor
6.5.1 Layout of equipment floor shall meet the following requirements:
1 Clear height of equipment floor shall be determined according to the demands on
installation and maintenance of equipment and pipelines;
2 Layout of equipment floor shall facilitate the access and maintenance for the
equipment;
3 Equipment rooms with mutual influence in safety and hygiene shall not b adjacent to
each other.
4 Effective measures shall be taken to prevent vibration and noise adversely affecting
the device on the equipment floor or adjacent upper and lower use space;
5 The equipment layer shall be naturally or mechanically ventilated.
6.5.2 Refuge storey shall meet the requirements of the current national standard GB
50016 Code for fire protection design of buildings as well as the following requirements:
1 On the precondition that the refuge storey meets the refugee area, other areas out of
the refugee area may be doubled as equipment room or others, but the functional areas
shall be kept relatively independent and meet the requirements on fire prevention,
vibration, sound insulation and other aspects;
2 Clear height of refuge storey shall not less than 2.0 m. If the refuge storey has other
functions, its clear height shall be determined according to the required function space.
6.5.3 Clear height of open floor with normal activities shall not be less than 2.0 m.
6.6 Bathroom
6.6.1 Location of bathroom shall meet the following requirements:
1 According to the function, the bathroom shall be arranged in a way that they are
convenient, relatively hidden, and avoid the effects of the odor, humidity, noise or
interference generated on other rooms. The service radius of indoor public toilets shall
8 The clear distance from one-sided toilet stall to the outer edge of the opposite urinal or
tank shall not be less than 1.1 m if the stall is open-in and not less than 1.3 m if it is
open-out; the clear distance between the outer edges of urinals or tanks shall not be less
than 1.3 m (the minimum depth of the urinal is 350 mm) if they are arranged on two sides.
9 The net distance from the long side of the bathtub to the opposite wall surface shall not
be less than 0.65 m; the net width of the short side of the accessible tub bath room shall
not be less than 2.0 m, and a seat shall be arranged at one end of the bathtub which is
convenient to enter and use, and its depth shall not be less than 0.4 m.
6.6.6 Baby-care room shall be set up in buildings in traffic terminals, highway service
stations, hospitals, large and medium-sized shops, exhibition buildings, equivalent public
places; and they should be set up in the working places like office building. Baby-care
room shall meet the following requirements:
1 Baby-care room shall be a separate room and its area should not be less than 10.0
m2;
2 Baby-care room shall be arranged with wash basin, baby diaper, tables, chairs and
other necessary furniture;
3 The flooring of the baby-care room shall be paved with non-slip material.
6.7 Step, ramp and railing
6.7.1 The arrangement of steps shall meet the following requirements:
1 The tread width of indoor and outdoor steps for a public building should not be less
than 0.3m, and the tread height should be no more than 0.15m and no less than 0.1m;
2 Anti-skid measures shall be taken for treads;
3 The tread number of indoor steps should not be less than 2, if the elevation difference
is less than 2 treads, it should be built as a ramp;
4 If the total height of the steps exceeds 0.7 m, the protective measures shall be taken
on the free-face side;
5 The arrangement of steps of the steps of longitudinal aisle at amphitheaters, stadiums
and theater audience hall shall meet the requirements of the relevant national
standards.
6.7.2 The arrangement of ramps shall meet the following requirements:
6.8 Stairs
6.8.1 The number and location of stairs, the clear width of flights and the form of
staircases shall meet the requirements on use convenience and evacuation safety.
6.8.2 If handrails are arranged on a side, the clear width of flight shall be the horizontal
distance from the wall decoration surface to the handrail central line. If handrails are
arranged on both sides, the net width of flight shall be the horizontal distance between the
central lines of the handrails on both sides. If there is a projection, the clear width of flight
shall be calculated from the surface of the projection.
6.8.3 The clear width of flights shall meet the requirements of GB 50016 Code for fire
protection design of buildings and the relevant national special standards for building
design. Besides conforming to the requirements above, the net width of flights of the stairs
for daily travel shall be determined by the number (not less than two) of the pedestrian
flows [the width of each pedestrian flow is 0.55 m + (0-0.15) m, where (0-0.15) m is the
swing of human body in movement] according to the use characteristics of the buildings.
The upper limit value of shall is used for the places where there are a lot of people in a
public building.
6.8.4 If a flight has direction change, the minimum width of platform at handrail turning
end shall not be less than the clear width of flight and 1.2 m. If there is a need to carry
large objects, it shall be broadened appropriately. The width of the middle platform of the
direct stairs shall not be less than 0.9 m.
6.8.5 The number of treads on each flight shall not be less than 3, and not more than 18.
6.8.6 The clear height of upper and lower passageways of stairway platform shall
not be less than 2.0 m, and the clear height of flight shall not be less than 2.2 m.
Note: The clear height of flights is the vertical height from the front edge of the tread (including the scope
0.3 m beyond the front edge lines of the lowest and highest treads) to the lower edge of the protrusion
above.
6.8.7 At least one side of the stair shall be equipped with handrails; if the clear width of
the flight contains three pedestrian flows, two sides of the stair shall be equipped with
handrail, and if it contains four pedestrian flows, the middle handrail should be added.
6.8.8 The handrail height of indoor stairs should not be less than 0.9 m from the front
edge line of tread. If the length of horizontal railing or sideboard for stairs is more than 0.5
m, the railing height shall not be less than 1.05 m.
6.8.9 At nursery, kindergarten, middle and elementary schools, and other special activity
be surrounded by stairs;
9 Elevator shafts and machine rooms should not be placed adjacent to the rooms with
quiet requirements, otherwise vibration insulation and sound insulation measures shall be
taken;
10 Elevator machine room shall be equipped with measures such as thermal insulation,
ventilation, dust prevention, etc. and should be equipped with natural daylighting, and the
roof of the machine room shall not be used as the baseplate of the water tank and directly
cross the water pipe or steam pipe in the machine room;
11 The arrangement of fire elevators shall meet the relevant requirements of the current
national standard GB 50016 Code for fire protection design of buildings;
12 The passenger elevators of buildings for the elderly and disabled people shall be
equipped with a monitoring system. The elevator door should be equipped with a visual
window, and shall meet the relevant requirements of the current national standard GB
50763 Code for accessibility design.
6.9.2 Escalators and moving walkways shall meet the following requirements:
1 The escalators and moving walkways shall not be the emergency exit;
2 The width of the unobstructed area at the entrance and exit shall not be less than 2.5
m from the end of the handrail belt, and the width of the unobstructed area of the den...
......
(Above excerpt was released on 2020-01-20, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GB50352-2019