GBJ 300-1988 Unified standard for inspection and assessment of building installation engineering quality GBJ300-88
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Construction Installation Engineering Quality
Unified Standard for Inspection and Evaluation
GBJ300—88
1989
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Construction Installation
U.S. Engineering Quality
Unified Standard for Inspection and Evaluation
GBJ300—88
Editor Department: Former Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approval Department: People's Republic of China Ministry of Construction Implementation date: September 1, 1989 Engineering Construction Standards Full Text Information System
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Notice on the Release of the National Standard "Uniform Standard for Inspection and Assessment of Construction and Installation Project Quality" and Other Six Inspection and Assessment Standards (88) Jianbiao No. 335
According to the former State Construction Commission (79) Jianfa Shi Zi No. 168 document and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke Zi No. 293 notice, the six inspection and assessment standards including "Uniform Standard for Inspection and Assessment of Construction and Installation Project Quality" revised by the former Ministry of Urban and Rural Construction and Environmental Protection have been reviewed by relevant departments and are now approved as national standards for implementation on September 1, 1989. The provisions on elevators in the former national standards "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Building Projects) TJ301-74, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Pipeline Projects) TJ302-74, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Electrical Projects) TJ303-75, "Standard for Inspection and Assessment of Quality of Building Installation Projects" (Ventilation Projects) TJ304-74 and "Standard for Inspection and Assessment of Quality of Building Installation Projects" (General Machinery and Equipment Installation Projects) TJ305-75 shall be abolished at the same time.
The six inspection and assessment standards currently approved shall be managed by the Construction Supervision Department of the Ministry of Construction, and the names, numbers and interpretation units of each item are as follows: 1. "Uniform Standard for Inspection and Assessment of Quality of Building Installation Projects" GBJ300-88, and its specific interpretation shall be the responsibility of the China Academy of Building Research. 2. "Standard for Inspection and Assessment of Quality of Building Projects" GBJ301-88, and its specific interpretation shall be the responsibility of the China Academy of Building Research. 3. The "Quality Inspection and Assessment Standard for Building Heating, Sanitation and Gas Engineering" GBJ302-88, its specific interpretation and other work shall be the responsibility of Shenyang Construction Engineering Management Bureau. 4. The "Quality Inspection and Assessment Standard for Building Electrical Installation Engineering" GBJ303-88, its specific interpretation and other work shall be the responsibility of Zhejiang Provincial Construction Engineering Corporation Industrial Equipment Installation Company.
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5. The "Quality Inspection and Assessment Standard for Ventilation and Air Conditioning Engineering" GBJ304-88, its specific interpretation and other work shall be the responsibility of Shanghai Industrial Equipment Installation Company. 6. The "Quality Inspection and Assessment Standard for Elevator Installation Engineering" GBJ310-88, its specific interpretation and other work shall be the responsibility of Beijing Equipment Installation Engineering Company. The publication and distribution of the above six inspection and assessment standards shall be the responsibility of China Construction Industry Press. Ministry of Construction of the People's Republic of China
November 5, 1988
Engineering Construction Standards Full Text Information System
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Revision Notes
This standard is based on the former National Construction Committee (79) Jianfa Shi Zi No. 168 and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke Xue No. 293 Notice, and was revised by the China Academy of Building Research in conjunction with the Liaoning Provincial Construction Engineering Bureau, Beijing Construction Engineering Quality Supervision Station, and Gansu Province, Hubei Province, and Hangzhou Construction Engineering Corporation to revise the general description of the original "Standard for Inspection and Assessment of Building Installation Engineering Quality". During the revision process, extensive investigations and studies were conducted and opinions from all relevant parties were solicited. Coordination was also carried out with the revision groups of the quality inspection and assessment standards for construction engineering, building heating, sanitation and gas engineering, building electrical installation engineering, ventilation and air conditioning engineering, and elevator installation engineering. After revision, it was named "Uniform Standard for Inspection and Assessment of Building Installation Engineering Quality". This standard has four chapters, sixteen articles and six appendices. In the revision, the original standard's quality inspection and evaluation is divided into "qualified" and "excellent" according to the sub-items, divisions and unit projects, and its quality is divided into "qualified" and "excellent" provisions. The comprehensive inspection and evaluation of unit projects has been added, which has widened the gap between the two levels of "qualified" and "excellent". The main items, general items, and items with allowable deviations in the original standard have been changed to guaranteed items, basic items, and items with allowable deviations.
This standard was reviewed and approved by representatives of relevant ministries and commissions and 26 provinces, autonomous regions, and municipalities at the national review meeting held in Guiyang from February 27 to March 5, 1987.
During the implementation process, please send your opinions and relevant materials to the China Academy of Building Research for reference in future revisions.
Construction Supervision Department of the Ministry of Construction
October 24, 1988
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Chapter 1
Chapter 2
Chapter 3
Chapter 4
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
General Principles·
Classification of Quality Inspection and Evaluation
Grades of Quality Inspection and Evaluation
Quality Quantity inspection and assessment procedures and organization
Sub-project quality inspection and assessment form
Sub-project quality assessment form·
Quality assurance data verification form
Unit project visual quality assessment form
Unit project quality comprehensive assessment form
Terms used in this standard
Additional explanation
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Chapter 1 General Provisions
Article 1.0.1 This standard is formulated to unify the quality inspection and assessment methods of building installation projects, promote enterprises to strengthen management, and ensure project quality. Article 1.0.2 This standard applies to the quality inspection and assessment of construction projects and building equipment installation projects for industrial and civil buildings. Article 1.0.3 This standard is mainly compiled based on relevant technical standards and construction and acceptance specifications for building installation projects issued by the state. This standard should be used in conjunction with the "Construction Engineering Quality Inspection and Assessment Standard" GBJ301-88, "Construction Heating Sanitation and Gas Engineering Quality Inspection and Assessment Standard" GBJ302-88, "Construction Electrical Installation Engineering Quality Inspection and Assessment Standard" GBJ303-88, "Ventilation and Air Conditioning Engineering Quality Inspection and Assessment Standard" GBJ304-88,
"Elevator Installation Engineering Quality Inspection and Assessment Standard" GBJ310-88.
Chapter 2 Division of Quality Inspection and Assessment
Article 2.0.1 The quality of construction installation engineering shall be inspected and assessed according to the division of sub-items, sub-sections and unit projects.
Article 2.0.2 The division of construction engineering sub-items and sub-section projects shall comply with the following provisions:
Sub-item projects: Generally, they should be divided according to the main types of engineering. For example, brick engineering, steel engineering, glass engineering, etc.
Sub-projects should be divided into foundation and foundation engineering, main engineering, ground and floor engineering, door and window engineering, decoration engineering, roof engineering, etc. according to the main parts of the building. The main sub-projects in multi-story and high-rise housing projects must be divided into sub-projects according to floors (sections); the main sub-projects in single-story housing projects should be divided into sub-projects according to expansion joints, and the sub-projects of other sub-projects can be divided according to floors (sections). When evaluating the quality of each sub-project, its sub-projects should participate in the evaluation. Engineering 6 Construction Standard Full-text Information System
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The names of sub-items and sub-projects should comply with Table 2.0.2. Table of names of construction project sub-items and sub-projects No.
Sub-project name
Foundation and foundation engineering
Main project
Ground and floor engineering
Door and window engineering
Decoration engineering
Roof engineering
Sub-project name
Earthwork, blasting, lime soil, sand, gravel and three-in-one foundation, heavy hammer compaction foundation, strong compaction foundation, compaction pile, vibratory foundation, rotary grouting foundation, driving (Pressed) piles, cast-in-place piles, caissons and caissons, underground continuous walls, waterproof concrete structures, cement mortar waterproof layers, waterproof membrane layers, formwork, steel bars, concrete, component installation, prestressed reinforced concrete, brickwork, stonework, steel structure welding, steel structure bolting, steel structure fabrication, steel structure installation, steel structure painting, etc.
Formwork, steel bars, concrete, component installation, prestressed reinforced concrete, brickwork, stonework, steel structure welding, steel structure bolting, steel structure fabrication Work, steel structure installation, steel structure painting, wooden roof frame production, wooden roof frame installation, roof wooden frame, etc.
Base, overall floor, ground, plate floor, ground, wooden board floor, ground, etc.
Wooden door and window production, wooden door and window installation, steel door and window installation, aluminum alloy door and window installation, etc.
General plastering, decorative plastering, bare brick wall jointing, painting, dramatic (spraying) slurry, glass, wallpapering, facing, cover panel and steel-wood frame, fine wood products, floral decoration installation, etc.||tt| |Roof leveling layer, thermal insulation layer, waterproofing with roll material, caulking coating roof, fine stone concrete roof, flat tile roof, thin steel plate roof, corrugated tile roof, downspout, etc.
Note, 1. Foundation and base sub-project, including the structure and waterproofing sub-project with design elevation below ±0.00, 2. Formwork engineering and prefabricated components and accessories manufacturing sub-projects do not participate in the sub-project quality assessment, but the quality of components and accessories must meet the qualified standards and check the factory certificate. Article 2.0.3
Comply with the following provisions:
The division of sub-items and sub-projects of building equipment installation projects shall comply with sub-projects: Generally, they shall be divided according to the type of work and equipment group. For example, indoor water supply pipeline installation projects, electrical piping and pipe threading projects, ventilation ducts and parts installation projects, elevator guide rail assembly projects, etc. Sub-projects: should be divided into building heating, sanitary and gas engineering, building electrical installation engineering, ventilation and air-conditioning engineering, elevator installation engineering, etc. according to the specialty of the project. The sub-projects in each sub-project can be divided according to systems and sections. When evaluating the quality of the sub-project, all should participate in the evaluation.
The names of the sub-items and sub-projects should comply with the provisions of Table 2.0.3. Table of names of sub-items and sub-projects of building equipment installation projects Serial number
Division (or unit)
Project name
Building heating, sanitary and
Gas engineering
Building electrical installation engineering
Ventilation and air-conditioning engineering
Elevator installation engineering
Sub-project name
Water supply pipe installation, water supply pipe accessories and sanitary ware water supply accessories installation, water supply ancillary equipment installation, drainage pipe installation, sanitary ware installation, heating pipe installation, heating radiator and solar energy Installation of water heaters, heating ancillary equipment, gas pipelines, boilers, boiler ancillary equipment, boiler accessories, etc. Water supply pipelines, drainage pipelines, heating pipelines, gas pipelines, gas pressure regulating devices, etc. Overhead lines and pole-mounted electrical equipment installation, cable lines, piping and pipe threading, porcelain clips, porcelain columns (beads) and porcelain bottles wiring, sheathed wire wiring, trough plate wiring, wiring cables, hard busbars, sliding wiring and mobile soft cables, power transformers, high-voltage switches, complete sets of distribution cabinets (panels) and power switch cabinets installation Installation, low voltage electrical installation, electrical inspection and wiring of motors, battery installation, electrical lighting fixtures and distribution box (panel) installation, lightning rod (net) and grounding device installation, etc.
Metal duct production, rigid polyvinyl chloride duct production, component production, duct and component installation, air handling room production and installation, muffler production and installation, dust collector production and installation, ventilator installation, refrigeration pipeline installation, anti-corrosion and painting, duct and equipment insulation, refrigeration pipeline insulation, etc. Guidance device assembly, guide rail assembly, car box, floor door assembly, electrical device installation, safety protection equipment Installation, trial operation, etc. Article 2.0.4 The division of unit projects shall comply with the following provisions: construction projects and building equipment installation projects together constitute a unit project Engineering Construction Standard Full Text Information System
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2. New (expanded) residential areas and factory areas, outdoor water supply, drainage, heating, gas and other building heating sanitation and gas projects constitute a unit project, outdoor overhead lines, cable lines, street lights and other building electrical installation projects constitute a unit project: roads, walls and other projects constitute a unit project. Chapter 3 Quality Inspection and Evaluation Grades
Article 3.0.1 The quality of sub-items, divisions and unit projects of this standard are divided into two grades: "qualified" and "excellent". Article 3.0.2 The quality grade of the sub-projects shall comply with the following provisions: 1. Qualified
1. Guaranteed projects must comply with the provisions of the corresponding quality inspection and assessment standards; 2. The parts (items) of the basic project sampling inspection shall comply with the qualified provisions of the corresponding quality inspection and assessment standards;
3. Among the points of the allowable deviation items, 70% or more of the actual measured values of the construction project and 80% or more of the building equipment installation project shall be within the allowable deviation range of the corresponding quality inspection and assessment standards.
2. Excellent
1. Guaranteed projects must comply with the provisions of the corresponding quality inspection and assessment standards; 2. The parts (items) of each basic project sampling inspection shall comply with the qualified provisions of the corresponding quality inspection and assessment standards; if 50% or more of the parts (items) meet the excellent provisions, the item is excellent, and the number of excellent items shall account for 50% or more of the number of inspection items. 3. Among the points of the allowable deviation items, 90% or more of the actual measured values shall be within the allowable deviation range of the corresponding quality inspection and assessment standards. Article 3.0.3 The quality level of the sub-projects shall comply with the following provisions: 1. Qualified: The quality of all the sub-projects included is qualified. 2. Excellent: The quality of all the sub-projects included is qualified, of which 50% or more are excellent (the construction equipment installation project must include the designated major sub-projects).
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Note: The designated major sub-projects, such as the building heating, sanitation and gas sub-projects are boiler installation and gas pressure regulating device installation sub-projects, the building electrical installation sub-projects are power transformer installation, complete set of distribution cabinets (panels) and power switch cabinet installation, cable line sub-projects; ventilation and air conditioning sub-projects are air purification sub-projects; building elevator installation sub-projects are safety protection devices, trial operation sub-projects, etc. Article 3.0.4 The quality level of unit projects shall comply with the following provisions: 1. Qualified
1. The quality of all sub-projects included shall be qualified; 2. The quality assurance data shall be basically complete,
3. The score rate of visual quality assessment shall reach 70% or above. 2. ExcellentbzxZ.net
1. The quality of all sub-projects included shall be qualified, of which 50% or above shall be excellent. The construction project must include the main body and decoration sub-projects; for unit projects mainly based on building equipment installation projects, the designated sub-projects must be excellent. Such as the building heating, sanitation and gas sub-projects of the boiler room, the building electrical installation sub-projects of the transformer and distribution room, the ventilation and air conditioning sub-projects of the air-conditioning room and the clean room, etc. 2. The quality assurance data shall be basically complete.
3. The score rate of visual quality assessment shall reach 85% or above. Note: The visual quality assessment is not conducted for outdoor unit projects. Article 3.0.5 When the quality of a sub-project does not meet the requirements of the corresponding quality inspection and evaluation standards, it must be handled in a timely manner, and its quality level should be determined according to the following provisions:
1. The quality level of reworked works can be re-evaluated; 2. If it can meet the design requirements after reinforcement or appraisal by the statutory inspection unit, its quality should only be rated as qualified;
3. If it does not meet the original design requirements after appraisal by the statutory inspection unit, but it can meet the structural safety and functional requirements after approval by the design unit, it does not need to be reinforced; or if the external dimensions are changed or permanent defects are caused after reinforcement, its quality can be determined as qualified, but the sub-project should not be rated as excellent.
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Chapter 4 Quality Inspection and Evaluation Procedure and Organization Article 4.0.1 The quality of a sub-project should be evaluated by the unit project leader and relevant personnel on the basis of the team self-inspection, and verified by the full-time quality inspector. The quality inspection and evaluation form for sub-projects shall adopt the unified format of Appendix 1 of this standard. Section 4.0.Article 2 The quality of the sub-project shall be evaluated by the technical person in charge who is equivalent to the first level of the construction team and verified by the full-time quality inspector. The quality of the foundation and base and the main sub-project shall be verified by the technical and quality departments of the enterprise. The inspection and evaluation form of the quality of the sub-project shall adopt the unified format of Appendix 2 of this standard. Article 4.0.3 The quality of the unit project shall be inspected and evaluated by the relevant departments of the enterprise organized by the technical person in charge of the enterprise, and the relevant evaluation materials shall be submitted to the local engineering quality supervision or competent department for verification.
The quality assurance data verification form shall adopt the unified format of Appendix 3 of this standard. The unit project visual quality evaluation form shall adopt the unified format of Appendix 4 of this standard. The unit project quality comprehensive evaluation form shall adopt the unified format of Appendix 5 of this standard. Article 4.0.4 When a unit project is constructed by several subcontractors, its general contractor shall be fully responsible for the quality of the project. Each subcontractor shall inspect and evaluate the quality level of the sub-items and sub-projects it undertakes in accordance with the provisions of this standard and the corresponding quality inspection and evaluation standards, and shall submit the evaluation results and materials to the general contractor. Engineering construction standard full text information system
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