Document of Beijing Municipal Commission of Planning and Natural Resources

Jing Gui Zi Fa [2020] No. 157

Circular on Issuing the Measures for Credit Management of Survey and Design Quality for Low-Risk Projects

All relevant organizations,

To further optimize the business environment and strengthen safety supervision over survey and design quality for low-risk projects in Beijing, we will create an in-process and ex-post supervision model featuring “random inspections and prompt release of results”, and implement credit supervision over survey and design agencies and their employees in Beijing. The Measures for Credit Management of Survey and Design Quality for Low-Risk Projects are hereby issued for your implementation.

The Circular is hereby issued.

Appendix: Measures for Credit Management of Survey and Design Quality for Low-Risk Projects

Beijing Municipal Commission of Planning and Natural Resources

April 29, 2020

Beijing Municipal Commission of Planning and Natural Resources
Measures for Credit Management of Survey and Design Quality for Low-Risk Projects

Article 1These Measures are formulated to ensure the survey and design quality and safety of low-risk projects in Beijing, create an effective in-process and ex-post supervision model featuring “random inspections and prompt release of results”, and implement credit supervision over survey and design agencies and their employees in the city.

Article 2 The Beijing Municipal Commission of Planning and Natural Resources is responsible for supervision and inspection over survey and design quality for low-risk projects in Beijing. The commission authorizes a construction drawing review agency to carry out ex-post inspection of survey and design quality using the “Internet Plus” model whereby random inspections are implemented and results are promptly released.

The construction drawing review agency is determined by random selection.

Article 3The low-risk projects mentioned in these Measures include all internal renovation projects, as well as new construction and expansion projects for which a single building has an above-ground floor area of less than 5,000 m²and an underground floor area of less than 2,000 m², except for crowded places and special construction projects specified in Article 13 and Article 14 of the Provisions on Supervision and Administration of Fire Protection of Construction Projects(Order of the Ministry of Public Security No. 119).

For low-risk projects that are not subject to prior review in Beijing, the survey and design agencies shall undertake that the survey reports and construction drawing design documents conform to national and local standards.

Article 4The Beijing Municipal Commission of Planning and Natural Resources shall carry out an ex-post inspection on the survey and design quality of low-risk projects every two months. Projects to be inspected are randomly selected from those in the low-risk “one-stop” service system that have obtained construction permits. The inspection proportion is determined according to the nature and scale of the projects (see Appendix 1) and shall be adjusted according to the inspection results of the previous year.

Article 5 The ex-post inspection of survey and design quality focuses on structural safety, fire safety and other aspects related to public interests and public safety (see Appendix 2 for the inspection points).

Article 6 After determining the projects to be inspected, the Beijing Municipal Commission of Planning and Natural Resources shall ask the survey and design agencies to submit online their survey reports or construction drawing design documents to be inspected, and authorize a construction drawing review agency to carry out technical inspection. Any agency that fails to submit required documents in time will be listed as loss of credibility.

Article 7The construction drawing review agency shall inspect the contents of the survey reports or construction drawings concerning public interests and public safety according to the inspection points, and truthfully report the inspection results to the Beijing Municipal Commission of Planning and Natural Resources.

Article 8 The Beijing Municipal Commission of Planning and Natural Resources shall inform the inspected agencies of the inspection results. An inspected agency that has any objection to the inspection results shall file an application for double check with the Beijing Municipal Commission of Planning and Natural Resources within 5 working days upon receipt of the inspection results. The commission shall organize more than 3 experts in this profession to double review the results, and the final conclusion shall be subject to the double check results.

Article 9 The Beijing Municipal Commission of Planning and Natural Resources shall issue a Notice of Survey and Design Rectificationto the survey and design agencies concerned according to the final inspection results. The commission shall, in accordance with the law, impose administrative penalties on the relevant survey and design agencies that are found to have violated the mandatory standards of construction during the inspection.

Article 10 The survey and design agencies shall immediately make rectification according to the Notice of Survey and Design Rectificationand report the rectification to the Beijing Municipal Commission of Planning and Natural Resources for the record.

Article 11 The Beijing Municipal Commission of Planning and Natural Resources shall send a copy of the inspection results to the Beijing Municipal Commission of Housing and Urban-Rural Development which shall urge the contractors to implement rectifications in accordance with the revised design documents during the project implementation.

Article 12The inspection results shall be published regularly on the website of the Beijing Municipal Commission of Planning and Natural Resources. The disclosed contents shall include the time of inspection, the contents of inspection, the inspected agencies, project leaders, profession leaders, the inspection results, and the handling suggestions.

Article 13 The Beijing Municipal Commission of Planning and Natural Resources shall be responsible for supervising and assessing the inspection quality of the review agency.

Article 14The Beijing Municipal Commission of Planning and Natural Resources shall implement quality credit score management for survey and design agencies, project leaders and profession leaders, conduct quality credit rating and punishment for relevant agencies and personnel, and publish and rank them on the website of the commission.

Article 15The scoring period starts from January 1 to December 31 each year. The initial points of an agency or a person start from 100 points each year. When the scoring period ends, the annual points of the agency or the person will be re-scored. For any agency not inspected during a year, its score is 0.

Article 16According to the inspection results, the Beijing Municipal Commission of Planning and Natural Resources shall deduct points from the concerned survey and design agencies, project leaders and profession leaders.

1. Each violation of mandatory construction standards will result in a deduction of 6 points, and included in the quality credit score for the current year and the next year.

2. Each serious violation of safety which does not involve mandatory construction standards will result in a deduction of 4 points.

3. Each violation of general regulations will result in a deduction of 2 points.

4. Three points will be added to a project where no above problems are found.

Article 17The Beijing Municipal Commission of Planning and Natural Resources shall deal with survey and design agencies as follows according to their scores:

1. When 25 points are deducted, an agency will be rated as minor loss of credibility. The agency will be interviewed and subject to a more frequent inspection of its projects.

2. When 35 points are deducted, an agency will be rated as ordinary loss of credibility. The agency will be asked to make rectification for three months, during which the agency’s bidding for survey and design and construction drawing review in the city will be suspended.

3. When 50 points are deducted, an agency will be rated as serious loss of credibility. The agency will be asked to make rectification for six months, during which the agency’s bidding for survey and design and construction drawing review in the city will be suspended.

Article 18The Beijing Municipal Commission of Planning and Natural Resources shall deal with project leaders and profession leaders of design and survey agencies as follows according to their scores:

1. Project leader

i. When 20 points are deducted, a project leader will be rated as minor loss of credibility. The person will be interviewed and subject to a more frequent inspection of his/her projects.

ii. When 35 points are deducted, a project leader will be rated as ordinary loss of credibility and shall not be appointed as project leader within three months.

iii. When 50 points are deducted, a project leader will be rated as serious loss of credibility and shall not be appointed as project leader within six months.

2. Profession leader

i. When 15 points are deducted, a profession leader will be rated as minor loss of credibility. The person will be interviewed and subject to a more frequent inspection of his/her projects.

ii. When 30 points are deducted, a profession leader will be rated as ordinary loss of credibility and shall not be appointed as profession leader within three months.

iii. When 50 points are deducted, a profession leader will be rated as serious loss of credibility and shall not be appointed as profession leader within six months.

Article 19The Beijing Municipal Commission of Planning and Natural Resources shall inform the relevant agencies and individuals of the credit scores and the levels of loss of credibility by SMS or in writing. Any agency or individual having any objection to the scores shall appeal to the commission in writing within 10 working days.

Article 20The credit records of agencies and individuals shall be published the website every year, and the duration of publicity shall be determined according to the level of loss of credibility:

1. Minor loss of credibility: 6 months;

2. Ordinary loss of credibility: 1 year;

3. Serious loss of credibility: 2 years.

Article 21 The Beijing Municipal Commission of Planning and Natural Resources shall strictly abide by the rules and regulations, observe the work discipline, administer the work according to the law and enforce the law honestly in the course of carrying out the quality inspection based on random inspections and prompt release of results as well as the credit supervision over the survey and design of low-risk projects.

Article 22The trial period of these Measures will end at December 31, 2020, upon which these Measures will be revised according to the actual situation for formal implementation.

Appendix: 1. Inspection Proportion of Random Inspections and Prompt Release of Results

2. Inspection Points of Low-Risk Projects

Beijing Municipal Commission of Planning and Natural Resources
April 29, 2020

Appendix 1: Inspection Proportion of Random Inspections and Prompt Release of Results

Beijing Municipal Commission of Planning and Natural Resources

Inspection Points of Random Inspections and Prompt Release of Results for Survey and Design of Low-Risk Projects

(Trial)

April 2020

Table of Contents

Part I Low-Risk New Construction and Expansion Projects

Inspection Points for Low-Risk New Construction and Expansion Projects

1. Architecture Profession

1.1 New and expansion projects -- plant and warehouse

1.1.1 Mandatory provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

3.7.2The number of fire exits in each fire compartment or in each floor of a fire compartment shall be determined by calculation and shall not be less than two. When the following conditions are met, one safety exit can be set:

4. For Type IV and V plants, the floor area of each floor is no more than 400 m², and the number of workers operating at the same time is no more than 30;

5. For underground or semi-underground plants (including basement or semi-basement), the floor area of each floor is no more than 50 m², and the number of workers operating at the same time is no more than 15.

3.7.3For underground or semi-underground plants (including basement or semi-basement), when at least two fire compartments are set adjacent to each other and separated by fire walls, the Class A fire door in each fire wall that enables access to the adjacent fire compartment may be used as the second safety exit. However, each fire compartment must have at least one separate fire exit straightly leading to the outside.

3.8.2Each warehouse shall have no less than two security exits. When a warehouse covers a floor area of no more than 300 m², one safety exit can be set. Each fire compartment in a warehouse shall have no less than two exits leading to the evacuation passageway, staircase or outside. When a fire compartment covers a floor area of no more than 100 m², one safety exit can be set. Doors leading to evacuation passageways or staircases shall be Class B fire doors.

1.1.2 General provisions that seriously affect safety

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

3.7.5The total net widths of evacuation staircases, passageways or doors in a plant shall be calculated according to the minimum net widths for evacuation for every 100 people evacuated, which shall not be lower than those in Table 3.7.5. However, the minimum net width of staircases for evacuation shall not be less than 1.10 m, the minimum net width of passageways for evacuation shall not be less than 1.40 m, and the minimum net width of doors for evacuation shall not be less than 0.90 m. When the number of evacuees on each floor is not the same, the total net width of staircases for evacuation shall be calculated by floors. The total net width of staircases on a floor shall be calculated according to the number of evacuees on this floor as well as the maximum number of evacuees on another floor above.

Table 3.7.5 Minimum net width of stairs, passageways and doors for evacuation in the plant for every 100 people evacuated

1.2 New construction and expansion projects -- civil buildings (office buildings, commercial buildings, public service facilities)

1.2.1 Mandatory provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

5.5.15The number of evacuation doors for rooms in public buildings shall be calculated and shall not be less than two. Except for the rooms located at the end of passageways in nurseries, kindergartens, elderly care facilities, medical buildings and teaching buildings, one evacuation door can be installed in the rooms meeting one of the following conditions:

1. The room located between two safety exits or on either side of a pocket-shaped passageway, with a floor area of no more than 50 m²for nurseries, kindergartens and elderly care facilities; no more than 75 m²for medical buildings and teaching buildings; no more than 120 m²for other buildings or places.

2. The room at the end of a passageway, with a floor area of less than 50 m²and the net width of the evacuation door of no less than 0.90 m; or where the straight-line distance is no more than 15 m between any point in the room to the evacuation door, the room has a floor area of no more than 200 m²and the net width of the evacuation door is no less than 1.40 m.

5.5.17The safe evacuation distance of public buildings shall meet the following requirements:

1. The straight-line distance between the room evacuation door directly leading to the evacuation passageway and the nearest safety exit shall not be greater than that specified in Table 5.5.17.

2. The stairwell shall directly lead to the outside on the first floor. If it is difficult to do so, an enlarged enclosed stairwell or a smoke-proof front room in the stairwell may be used on the first floor. When there are no more than four floors and there is no enlarged enclosed stairwell or no smoke-proof front room in the stairwell, the door leading to the outside may be installed not more than 15 m away from the stairwell.

3. The straight-line distance from any point in the room to the home evacuation door directly leading to the evacuation passageway shall not be greater than the straight-line distance between the evacuation door on either side of or at the end of the pocket-shaped passageway and the nearest safety exit as specified in Table 5.5.17.

4. For any audience hall, exhibition hall, multi-function hall, restaurant or business hall with no less than two evacuation doors or safety exits in a building with Class I or II fire resistance rating, the straight-line distance from any point in the room to the nearest evacuation door or safety exit shall not be greater than 30 m. When the evacuation door cannot lead directly to the outdoor ground or the evacuation stairwell, an evacuation passageway of no more than 10 m in length shall be used to lead to the nearest safety exit. When a room is equipped with automatic sprinkler system, the safe evacuation distance from any point in the room to the nearest safety exit can be increased by 25%.

Table 5.5.17 Straight-line distance between the room evacuation door directly leading to the evacuation passageway and the nearest safety exit (m)

Note: 1. The straight-line distance from the room evacuation door in an open porch to the nearest safety exit can be increased by 5 m according to the provisions of this Table.

2. The straight-line distance between the room evacuation door directly leading to the evacuation passageway and the nearest open stairwell shall be reduced by 5 m according to the provisions of this Table when the room is located between two stairwells, or reduced by 2 m according to the provisions of this Table when the room is located on either side of or at the end of the pocket-shaped passageway.

3. When the buildings are fully equipped with automatic sprinkler systems, the safe evacuation distance can be increased by 25% as stipulated in this Table.

5.5.21In other public buildings except theaters, cinemas, auditoriums and gymnasiums, the total net widths of room evacuation doors, safety exits, evacuation passageways and evacuation staircases shall conform to the following provisions:

1. The total net widths of room evacuation doors, safety exits, evacuation passageways and evacuation stairs on each floor shall be calculated according to the minimum net widths for evacuation for every 100 people evacuated, which shall not be less than those in Table 5.5.21-1. When the number of evacuees on each floor is not the same, the total net width of staircases for evacuation shall be calculated by floors. The total net width of the lower staircases in the aboveground buildings shall be calculated according to the number of evacuees on this floor as well as the maximum number of evacuees on another floor above; while the total net width of the upper staircases in the underground buildings shall be calculated according to the number of evacuees on this floor as well as the maximum number of evacuees on another floor below.

Table 5.5.21-1 Minimum total net widths of room evacuation doors, safety exits, evacuation passageways and evacuation stairs on each floor for every 100 people evacuated (m/100 people)

1.2.2 General provisions that seriously affect safety

See 1.4.2.

1.3 New and expansion projects -- residential buildings

1.3.1 Mandatory provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

5.4.11For residential buildings with commercial service outlets, the residential part and the commercial part shall be completely separated by fire partitions with fire-resistance duration of no less than 2.00h and without doors, windows or holes as well as by non-combustible floors with fire-resistance duration of no less than 1.50h. Safety exits and evacuation staircases for residential and commercial parts shall be set separately.

Separation units in commercial service outlets shall be separated by fire partitions with fire-resistance duration of no less than 2.00h and without doors, windows or holes. When the floor area of each separation unit on a floor is greater than 200 m², two safety exits or evacuation doors shall be set on this floor. The straight-line distance from any point in a separation unit to the exit directly leading to the outside shall not be greater than the maximum straight-line distance between the evacuation door on either side of or at the end of the pocket-shaped passageway and the nearest safety exit as specified in Table 5.5.17for other multi-storey buildings.

Note: The distance of indoor stair can be calculated by 1.50 times of its horizontal projection length.

5.5.29The safe evacuation distance of residential buildings shall meet the following requirements:

1. The straight-line distance between the home door directly leading to the evacuation passageway and the nearest safety exit shall not be greater than that specified in Table 5.5.29.

Table 5.5.29 Straight-line distance between the home door directly leading to the evacuation passageway and the nearest safety exit in a residential building

Notes: 1. The maximum straight-line distance from the home door of an open porch to the nearest safety exit can be increased by 5 m according to the provisions of this Table.

2. The straight-line distance between the home door directly leading to the evacuation passageway and the nearest open stairwell shall be reduced by 5 m according to the provisions of this Table when the room door is located between two stairwells, or reduced by 2 m according to the provisions of this Table when the room door is located on either side of or at the end of the pocket-shaped passageway.

3. When the residential buildings are fully equipped with automatic sprinkler systems, the safe evacuation distance can be increased by 25% as stipulated in this Table.

4. The distance from the home door to the nearest safety exit of a skip-floor residential building shall be calculated from the home door. The distance of a small staircase can be calculated by 1.50 times the length of its horizontal projection.

2. The stairwell shall directly lead to the outside on the first floor, or an enlarged enclosed stairwell or a smoke-proof front room in the stairwell may be used on the first floor. When there are no more than four floors, the door leading to the outside may be installed not more than 15 m away from the stairwell.

3. The straight-line distance from any point in the home to the home door directly leading to the evacuation passageway shall not be greater than the maximum straight-line distance between the evacuation door on either side of or at the end of the pocket-shaped passageway and the nearest safety exit as specified in Table 5.5.29.

Note: In a skip-floor residential building, the distance of indoor stair can be calculated by 1.50 times of its horizontal projection length.

2)Design Code for Residential BuildingsGB 50096-2011

5.4.4The toilet shall not be set directly above the bedroom, living room, kitchen or dining room of the home on the lower floor.

6.4.7The elevator shall not be set next to the bedroom. When conditions do not permit and the elevator has to be set next to the bedroom, structural measures of sound insulation and vibration reduction shall be taken.

1.3.2 General provisions that seriously affect safety

See 1.4.2.

1.4 Construction, insulation, firefighting and rescue, fire facilities and others

1.4.1 Mandatory provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

6.2.5Except as otherwise stipulated in this code, a solid wall with a height of no less than 1.2 m or a fire eave with a projecting width of no less than 1.0 m and a length of no less than the width of the opening shall be set between the upper and lower openings of the building external wall. When the indoor sprinkler system is installed, the height of the solid wall between the upper and lower openings shall not be less than 0.8 m. When it is really difficult to set solid walls between the upper and lower openings, fireproof glass walls can be set. The fireproof glass walls of high-rise buildings shall have fire integrity of no lower than 1.00 h, and the fireproof glass walls of multi-storey buildings shall have fire integrity of no lower than 0.50 h. The fire integrity of exterior windows shall not be lower than that of fireproof glass walls.

The width of walls between adjacent openings on the external wall of the residential building shall not be less than 1.0 m. When it is less than 1.0 m, a partition board that protrudes the external wall for no less than 0.6 m shall be set between the openings.

6.2.6The building curtain wall shall adopt fire prevention measures in accordance with Article 6.2.5 of this code at the outer edge of each floor slab. The gap between the curtain wall and the floor slab and partition wall of each floor shall be sealed with fireproof blocking materials.

6.2.9The elevator shafts in the building shall meet the following requirements:

1. The elevator shaft shall be set independently. It is forbidden to lay pipelines of combustible gas as well as Type A, B and C liquids in the shaft. Cables and wires not related to the elevator shall not be laid. The wall of the elevator shaft shall not have any other openings except for the elevator door, safety escape door and ventilation hole.

2. Cable shafts, pipe shafts, smoke vents, exhaust ducts, garbage chutes and other vertical shafts shall be set separately. The fire resistance duration of shaft wall shall not be lower than 1.00 h, and the inspection door on shaft wall shall adopt Class C fire door.

3. On floor slabs of each floor, cable shafts and pipe shafts in the building shall be sealed with non-combustible materials or fireproof blocking materials with fire resistance duration not lower than that of floor slabs.

The holes in cable shafts and pipe shafts that connect rooms and passageways shall be sealed with fireproof blocking materials.

6.4.5Outdoor evacuation staircases shall meet the following requirements:

1. The height of handrails shall not be less than 1.10 m and the net width of stairs shall not be less than 0.90 m.

2. The tilt angle shall not be greater than 45°.

3. Staircase and platform shall be made of non-combustible materials. The fire resistance duration of the platform shall not be lower than 1.00 h, and the fire resistance duration of the staircase shall not be lower than 0.25 h.

4. The door that leads to external stairway shall use Class B fire door and open outwards.

5. Doors, windows or holes shall not be set on the walls within 2 m around the stairs, except for evacuation doors. An evacuation door shall not be directly opposite the staircase.

2)Code for Fire Prevention in Design of Interior Decoration of BuildingsGB 50222-2017

4.0.4For horizontal evacuation passageways and foyers of safety exits in aboveground buildings, the ceilings shall use Grade A decoration materials, while other parts shall use decoration materials with Grade B₁or above. For evacuation passageways and foyers of safety exits in underground buildings, the ceilings, walls and grounds shall all use Grade A decoration materials.

1.4.2 General provisions that seriously affect safety

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

6.4.1Evacuation stairwells shall meet the following requirements:

1. Stairwells shall have natural lighting and natural ventilation, and shall be set against external walls. When a stairwell is set against the external wall, the horizontal distance between the windows on the walls of the stairwell, the front room and the shared front room and the nearest edge of the door, window and hole on both sides shall not be less than 1.0 m.

1.4.3 General provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

6.7.7Except as provided in Article 6.7.3 of this code, when the external insulation system of the building external wall adopts the insulation materials with the combustion performance of Class B₁and B₂according to the provisions of this section, it shall comply with the following provisions:

2. Horizontal fire barriers shall be set in the insulation system of each floor. The fire barrier shall be made of materials with Class A combustion performance, and the height of the fire barrier shall not be less than 300 mm.

1. Structure Profession

For the construction drawing design documents (including calculations and drawings) of low-risk projects, the designers shall fully implement the relevant provisions of the construction standards and regulations. The inspection of construction drawings focuses on the implementation of design standards such as load and seismic action, as well as the key parts that seriously affect the safety of foundations and main structures.

In recent years, the new construction projects submitted by Beijing for inspection are mainly ordinary reinforced concrete multi-storey structures. The warehouses and plants are mostly portal frame light-weight steel structures, which are basically based on natural foundations. As a result, provisions related the structure profession mainly pertain to common violations found in the inspection of these types of structures and natural foundations. The provisions listed and other mandatory provisions as well as the general provisions that seriously affect the safety of foundation and main structure constitute the major points of inspection. The same shall apply to other types of structures and foundations.

2.1 Mandatory provisions:

1)Load Code for the Design of Building StructuresGB 50009-2012

5.1.1The nominal values and its coefficients for combination values, frequent values and quasi-permanent values of uniform live loads on the civil building floors shall not be less than those stipulated in Table 5.1.1. (See the code for details of Table 5.1.1)

7.1.2The reference snow pressure shall be the snow pressure for a 50-year recurrence period determined by the method prescribed in this code. For structures sensitive to snow load, the snow pressure for a 100-year recurrence period shall be used.

8.1.2The reference wind pressure shall be the wind pressure for a 50-year recurrence period determined by the method specified in this code, but shall not be less than 0.3 kN/m². For other structures which are more sensitive to wind load, the reference wind pressure shall be appropriately increased, and shall comply with the relevant structural design specifications.

2)Code for Design of Building FoundationGB 50007-2011

3.0.2According to the design grade of building foundation and the influence of foundation deformation on the superstructure under long-term load, the design of foundation shall meet the following requirements:

1. The foundation calculation of all buildings shall meet the requirements for bearing capacity calculation.

3. A building of design grade C shall be checked for deformation under any of the following conditions:

1. The characteristic value of foundation bearing capacity is less than 130 kPa, and the building has a complex shape;

2. There is a large difference in ground load or adjacent foundation load on and around the foundation, which may cause excessive uneven settlement of the foundation;

3. The building on weak foundation has eccentric load;

4. Adjacent buildings are close to each other and may lean;

5. The foundation is filled with soil with large thickness or uneven thickness, and its self-weight consolidation is not completed.

6. In case of floating in the basement of a building, anti-floating checking shall be carried out.

3)Code for Seismic Design of BuildingsGB 50011-2010 (2016 Version)

3.4.1According to the requirements of seismic conceptual design, architectural design shall define the regularity of architectural forms. Irregular buildings shall be strengthened according to regulations. Particularly irregular buildings shall be studied and demonstrated with special reinforcement measures. Seriously irregular buildings shall not be used.

5.4.2The following design expression shall be used for seismic checking of cross sections of structural members:

6.3.3The steel bar configuration of beams shall meet the following requirements:

2. The ratio of the quantity of reinforcement at the bottom and top of the beam end section shall not be less than 0.5 for Level I and 0.3 for Level II and Level III, in addition to the calculation.

3. When the reinforcement ratio of longitudinal tensile reinforcement at beam ends is more than 2%, the value of stirrup minimum diameter in the Table shall be increased by 2 mm.

6.4.3The reinforcing bars vertically and horizontally distributed in the seismic wall shall meet the following requirements:

1. The minimum reinforcement ratio of vertically and horizontally distributed reinforcing bars shall not be less than 0.25% in Level I, II and III seismic walls and 0.20% in Level IV seismic walls.

2. The reinforcement ratio of vertically and horizontally distributed reinforcing bars shall not be less than 0.3% in the bottom reinforced parts of floor seismic walls in partial frame-supported seismic wall structures.

8.3.6When the beam is rigidly connected with the column, the column shall be within the range of 500 mm above and below the beam flange, and the connection weld between the column flange and the column web or the box column siding shall adopt the full-penetration groove weld.

4)Technical Specification for Precast Concrete StructuresJGJ 1-2014

6.1.3The seismic design of assembled integral structural members shall adopt different seismic grades according to the type of fortification, intensity, structure type and building height, and shall meet the corresponding requirements of calculation and construction measures. The seismic grades of Class C assembled integral structures shall be determined according to Table 6.1.3.

Table 6.1.3 Seismic grades of Class C assembled integral structures

5)Technical Specification for High Strength Bolt Connections of Steel StructuresJGJ82-2011

4.3.1The number of high-strength bolts shall not be less than two for each member bar at the end of high-strength bolt joint and splice joint.

2.2 General provisions that seriously affect safety:

1)Code for Geotechnical Investigation and Design of Building Foundations in Beijing AreaDBJ 11-501-2009 (2016 Version)

7.3.7The standard value of foundation bearing capacity f_aafter the correction of depth and width can be calculated as follows:

7.4.3The allowable foundation deformation of the building shall be determined according to the superstructure, foundation type, the adaptability to foundation deformation and the use requirements. For general multi-storey buildings with no significant uneven load distribution, when the foundation is placed on a basically uniform soil layer with the same genetic age, the allowable foundation deformation is represented by the maximum long-term settlement of the building S_max, and it shall meet the requirements of Table 7.4.3.

Table 7.4.3 Allowable foundation deformation of multi-storey buildings

2)Design Specification for Precast Concrete Shear Wall StructureDB11/1003-2013

5.5.1The bearing capacity of the joints of precast wall panels shall be checked according to the following requirements:

1. Permanent design status and temporary design status:γ_jγ_oS_d≤R_jd(5.5.1-1)

2. Seismic design status: γ_jS_d≤R_jd/γ_RE(5.5.1-2)

3. Bottom reinforcement area; R_jdE≥η_jR_m(5.5.1-3)

2.3 General provisions:

1)Code for Seismic Design of BuildingsGB 50011-2010 (2016 Version)

H.2.1This section is applicable to multi-storey plants with steel frame, braced frame, frame bent structure and other structural systems. If no provisions are made in this section, Chapter 8 of this code may apply to multi-storey buildings, and the height boundary of its seismic grade shall be reduced by 10 m compared with that specified in Article 8.1 of this code. Article 9.2 of this code may apply to single-storey buildings.

2)Code for Design of Building FoundationGB 50007-2011

5.1.6When there are adjacent buildings, the embedded depth of foundation of new buildings shall not be greater than that of the original building foundation. When the embedded depth is greater than that of the original building foundation, a certain net distance shall be maintained between the two foundations, and its value shall be determined according to the building load, foundation form and soil conditions.

1. Water Supply and Drainage Profession

3.1 Mandatory Provisions

1)Code for Fire Protection Design of BuildingsGB50016-2014 (2018 Version)

8.2.1The indoor hydrant systems should be installed in the following buildings or places:

1. The plants and warehouses with a floor area of more than 300 m²;

2. The residences with a building height of more than 21 m;

3. The store buildings, hotel buildings, medical buildings, library buildings and other single or multi-storey buildings with a volume of more than 5,000 m³;

5. The office buildings, teaching buildings and other single or multi-storey civil buildings with a building height of more than 15 m or a volume of more than 10,000 m³.

8.3.4Except as otherwise stipulated in this Code and the places that are not suitable to use water to protect from or extinguish fire, the following single or multi-storey civil buildings or places should be equipped with automatic fire extinguishing systems, and are suitable for applying automatic sprinkler systems:

2. The exhibition, store, catering and hotel buildings with any floor area of more than 1,500 m²or a total floor area of more than 3,000 m², as well as the ward buildings, outpatient buildings and operation department with the same building scale in the hospital;

2)Technical Code for Firefighting Water Supply and Hydrant SystemsGB 50974-2014

5.1.12The suction of fire pump shall meet the following requirements:

1. The fire pump should adopt the method of self fill-up suction;

2. When the fire pump is pumped directly from the municipal pipe network, a backflow preventer with air isolating function should be installed on the outlet pipe of the fire pump;

5.1.13The suction pipe, outlet pipe and valve of the fire pump shall meet the following requirements:

1. There should not be less than two suction pipes in a set of fire pumps. When one in damage or maintenance status, the other suction pipes should still be able to supply all the fire water design flow;

2. The setting of fire pump suction pipe should avoid the formation of airbags;

3. There should not be less than two feeder main pipes in a set of fire pumps to connect with the fire water loop pipe network. When one in maintenance status, the other feeder pipes should still be able to supply all the fire water design flow;

4. The submerged depth of the water inlet of the fire pump should meet the requirements of safe operation of fire pump at the minimum water level. The submerged depth of the suction pipe socket at the minimum effective water level of fire pool should be determined according to the water flow velocity and hydraulic conditions of the suction pipe socket, yet it should not be less than 600 mm. When cyclone preventer is used, the submerged depth should not be less than 200 mm;

5.2.6The high-place fire tank shall meet the following requirements:

1. The effective volume, outlet water, drainage and water level of the high-place fire tank shall comply with the provisions of Articles 4.3.8 and 4.3.9 of this Code;

2. The minimum effective water level of the high-place fire tank should be determined according to the submerged depth of the suction pipe socket and cyclone preventer. When suction pipe socket is used, it shall comply with Article 5.1.13 (4) of this Code; when the cyclone preventer is used, it should be determined according to the product, and should not be less than 150 mm of protection height;

3)Code of Design for Automatic Sprinkler SystemsGB 50084-2017

5.0.1The basic design parameters of wet pipe system applied by the civil buildings and plants shall not lower than the requirements in Table 5.0.1.

4)Code for Design of Extinguisher Distribution in BuildingsGB 50140-2005

7.1.3The location and quantity of fire extinguishers shall be determined according to the maximum protection distance of the fire extinguisher. And the most unfavorable location shall be within the protection range of at least 1 fire extinguisher.

3.2 General provisions that seriously affect safety

1)Technical Code for Firefighting Water Supply and Hydrant SystemsGB 50974-2014

3.5.2The indoor hydrant design flow in the buildings shall not be less than that specified in Table 3.5.2.

7.4.7The location of indoor hydrants in the buildings shall meet the fire fighting requirements and shall comply with the following provisions:

1. The indoor hydrant should be equipped in the obviously easy-to-access places such as stairwell, rest platform, front room, walkway, etc. as well as the locations convenient for fire fighting;

3.3 General Provisions

1)Code for Fire Protection Design of BuildingsGB50016-2014 (2018 Version)

8.2.4For the densely populated public buildings and commercial service facilities with a floor area of more than 200 m², it should be equipped with fire hose reels or portable hose assemblies.

1. Heating and Ventilation Profession

4.1 Mandatory Provisions

1)Code for Fire Protection Design of BuildingsGB50016-2014 (2018 Version)

8.5.2The smoke exhaust facilities shall be set in the following places or parts of the plants or warehouses:

1. The type C production sites with lots of people and combustible materials. The aboveground rooms with a floor area of more than 300 m²and with lots of people or combustible materials in the Type C plants;

2. The Type D workshops with a floor area of more than 5,000 m²;

8.5.3The smoke exhaust facilities shall be set in the following places or parts of the civil buildings:

1. The places for singing, dancing, movie and entertainment set in the first, second and third floors with a floor area of more than 100 m²; the places for singing, dancing, movie and entertainment set in the fourth floor and above, underground or semi-underground;

3. The aboveground rooms with a floor area of more than 100 m²with lots of people in the public buildings;

4. The aboveground rooms with a floor area of more than 300 m²with lots of combustible materials in the public buildings;

5. The evacuation walkway with a height of more than 20 m in the buildings.

8.5.4The smoke exhaust facilities should be set in the underground or semi-underground buildings (rooms) and the windowless rooms in aboveground buildings with a total floor area of more than 200 m²or a room floor area of more than 50 m²and with lots of people or combustible materials.

9.3.11The fire valves with nominal operating temperature of 70°C shall be installed at the following locations for the air ducts of ventilation and air conditioning systems:

1. Across the fire compartments;

2. Across the room partitions and floorslabs of ventilation and air conditioning rooms;

3. Across the room partitions and floorslabs in important or fire hazard locations;

4. Across both sides of the deformation joint in the fire compartments;

5. The horizontal pipe section where vertical air duct is connected with horizontal air duct on each floor;

Note: When the ventilation and air conditioning systems of each fire compartment in the buildings are set independently, the junction of the horizontal air ducts and the vertical main pipes may not set fire facilities.

2)Technical Standards for Building Smoke Control and Exhaust SystemsGB 51251-2017

4.4.10The smoke exhaust fire valve shall be set in the following places:

1. The horizontal pipe section where vertical air duct is connected with horizontal air duct on each floor;

2. The smoke exhaust branch pipe where a smoke exhaust system covers multiple smoke control compartments;

3. The entrance of smoke exhaust fans.

5.2.2The control mode of smoke exhaust fans and air feed fans shall meet the following requirements:

1. Manually start on site;

2. Automatically start the automatic fire alarm system;

3. Manually start the fire control room;

4. When any smoke exhaust valve or vent in the system is open, the smoke exhaust fan and air feed fan start automatically;

5. The smoke exhaust fire valve should be automatically shut down at 280°C, and the smoke exhaust fan and air feed fan should be shut down in correlation.

4.2 General provisions that seriously affect safety

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

9.3.14Except in the following cases, the air duct of ventilation and air conditioning system shall apply incombustible materials:

1. The air ducts and flexible joints in contact with corrosive media can apply fire retardant materials;

2. When the fire compartment is not crossed and fire valve is set across the room partitions, the air ducts of ventilation and air conditioning system in the stadiums, exhibition halls, airport (cars, boats) buildings (halls) and other large space buildings, single or multi-storey office buildings and Type C, D, E plants can apply fire retardant materials.

2)Technical Standards for Building Smoke Control and Exhaust SystemsGB 51251-2017

4.4.8The installation and the fire endurance of smoke exhaust pipes shall comply with the following requirements:

1. The smoke exhaust pipes and its connecting parts should be able to ensure their structural integrity at 280°C for continuous 30 minutes;

2. The vertical installed smoke exhaust pipes shall be set in an independent pipe well, and the fire endurance of the smoke exhaust pipes shall not be lower than 0.5 h;

3 The horizontal installed smoke exhaust pipes shall be set in the ceiling with its fire endurance not lower than 0.50 h; when being really hard to realize, it can be directly installed indoors yet with its fire endurance not be less than 1.00 h;

4 The fire endurance of the smoke exhaust pipes installed in the ceiling of the walkway and the smoke exhaust pipes crossing the fire compartments, shall not be less than 1.00 h. However, the fire endurance of the smoke exhaust pipes in the equipment rooms and garages can be no less than 0.50 h.

4.3 General Provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

9.3.12For the vertical exhaust ducts in the bathrooms, toilets and kitchens in the public buildings, anti-backflow measures should be taken and the fire valve with nominal operating temperature of 70°C should be set on the branch pipe.

The smoke exhaust pipes of the kitchens in the public buildings should be set according to the fire compartments. And the fire valve with nominal operating temperature of 150°C should be set on the branch pipe in connection with the vertical exhaust ducts.

2)Technical Standards for Building Smoke Control and Exhaust SystemsGB 51251-2017

4.4.12The installation of the smoke outlet shall be calculated and determined according to Article 4.6.3 of this Standard. And the horizontal distance between any point in the smoke control compartment and the nearest smoke outlet shall not be greater than 30 m.

5. The smoke outlet should be set in such a way that the smoke plume direction is opposite to the evacuation direction. And the horizontal distance between the smoke outlet and the adjacent edge of the nearby safety exit should not be less than 1.5 m.

1. Electronics Profession

5.1 Mandatory Provisions

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

8.4.1The automatic fire alarm systems should be installed in the following buildings or places:

1. The plants for the production of shoes, clothing, toys, electronics and other similar purposes with any floor area of more than 1,500 m²or a total floor area of more than 3,000 m²;

2. Each warehouse for storing cotton, wool, silk, hemp, chemical fiber and their products with an area of more than 1,000 m², and the cigarette warehouse with a floor area of more than 500 m²or the total floor area is more than 1,000 m²;

3. The buildings for stores, exhibitions, trade finance, passenger and freight service and other similar purposes with any floor area of more than 1,500 m²or a total floor area of more than 3,000 m², and the underground or semi-underground stores with a total floor area of more than 500 m²;

7. The places of children rooms in large and medium kindergartens, the elderly care facilities, the ward building of sanatorium, the hotel buildings and other children activity places with any floor area of more than 1,500 m²or a total floor area of more than 3,000 m², as well as the outpatient buildings, ward buildings and operation department in the hospital with no less than 200 beds;

8. The places for singing, dancing, movie and entertainment.

9. The technical interlayer with more combustibles and with a net height of more than 2.6 m, and the plenum or ceiling with combustibles available and with a net height of more than 0.8 m;

13. The places or parts in need of installing mechanical smoke exhaust and smoke control system, rain or pre-action automatic sprinkler system, fixed fire monitor firefighting system, gas firefighting system etc. to interconnect with automatic fire alarm system.

10.3.1Except for residential buildings with building height less than 27 m, the following parts of civil buildings, plants and Type C warehouses shall be equipped with evacuation lighting:

1. The enclosed stairwell, smoke-proof stairwell and its front room, the front room or the combined front room in the fire elevator, the refuge walkway and the refuge storey (rooms);

2. The audience hall, exhibition hall, multi-function hall and the densely populated places of with service hall, restaurant, studios with a floor area of more than 200 m²;

3. The underground or semi-underground public places with a floor area of more than 100 m²;

4. The evacuation walkway in the buildings;

5. The production sites and evacuation walkways in densely populated plants.

2)Standard on Fire Safety Evacuation Signs InstallationDB11/1024-2013

3.2.4The following buildings or places should add fire evacuation diversion signs on the evacuation walkways and main evacuation routes:

3. The underground or semi-underground public stores with a total floor area of more than 500 m²;

4. The places for singing, dancing, movie and entertainment.

3)Technical Standard for Fire Emergency Lighting and Evacuate Indicating SystemGB 51309-2018

3.3.2The residual current action protectors shall not be installed in the emergency lighting distribution box or the input and output circuits of the centralized power supply. And the output circuits shall not be connected to switch devices, sockets and other loads outside the system.

4)Design Code for Residential BuildingsGB 50096-2011

8.7.9In case of fire alarm, the access control on the evacuation walkway and the exit shall be able to be unlocked centrally or manually from the inside.

5.2 General provisions that seriously affect safety

1)Code for Fire Protection Design of BuildingsGB 50016-2014 (2018 Version)

10.3.5The public buildings, residential buildings with building height of more than 54 m, the high-rise plants (warehouses) and Type A, B, C single and multi-storey plants, shall be equipped with light evacuation indicator signs and shall comply with the following provisions:

1. It should be set in the safety exit and densely populated places above the evacuation door.

2)Code for Design of Automatic Fire Alarm SystemGB 50116-2013

10.1.5The output power of the emergency power supply of fire fighting equipment should be greater than 120% of the full load power of the automatic fire alarm and linkage control system. The capacity of the battery group should ensure that the automatic fire alarm and linkage control system can work continuously for more than 3 h in working load status and in fire situation.

3)Technical Standard for Fire Emergency Lighting and Evacuate Indicating SystemGB 51309-2018

3.2.1The light fitting shall meet the following requirements:

5. The material of the light fitting panel or lampshade shall meet the following requirements:

1) Except the panel of the marker light that is installed on the ground can use the tempered glass with thickness of 4 mm and above, the panel or the lampshade of the marker light that is installed at a distance of 1 m or less to the ground should not use fragile material or glass material;

2) The panel or lampshade of light fitting installed above the ceiling and evacuation path should not use glass material.

5.3 General Provisions

1)Technical Standard for Fire Emergency Lighting and Evacuate Indicating SystemGB 51309-2018

3.2.9The direction marker lights shall meet the following requirements:

1. The evacuation walkways and staircases with maintenance structures shall meet the following requirements:

1. It should be installed on the wall and cylinder on both sides of the walkway and staircase with less than 1 m from the ground and the height of the staircase;

2. When the safety exit or evacuation door is on the side of the evacuation walkways, the direction marker lights that point to the safety exit or evacuation door should be installed above the evacuation walkways;

3. When the marker plane of the direction marker light is perpendicular to the evacuation direction, the spacing of the light fitting shall not be more than 20 m; when the marker plane of the direction light is parallel to the evacuation direction, the spacing of the light fitting shall not be greater than 10 m.

Part II Low-risk Internal Renovation Projects

Inspection Points of Low-risk Internal Renovation Projects