GB 50300-2001 建筑工程施工质量验收统一标准 (英文版)

— 1 — UDC GB 中华人民共和国国家 National Standard of the People's Republic of China P GB 50300-2001 建筑质量验收统一标准 Unified standard for constructional quality acceptance of building engineering Issued on：2001-07-20 Implemented as of：2002-01-01 The Ministry of Construction of the PRC Jointly Issued by The State Bureau of Quality and Technical Supervision 本英文版为内部资料，仅供参考，以中文 版 为 准 。 The Chinese version of standards has precedence to their English translations which are only for internal reference. GB 50300－2001 — 1 — Notice of Issuing the National Standard “Unified standard for constructional quality acceptance of building engineering” Jian Biao [2001] No. 157 Relevant departments of the State Council, construction departments of provinces and autonomous regions, construction committees of municipalities directly under the Central Government, construction committees of cities directly under State planning, Xinjiang Construction Troops, all related institutes, As per the “Notice of Issuing the 1998 Formulation and Amendment Plan for National Standards on Engineering Construction (second batch)” (Jian Biao [1998] No. 244), the “Unified standard for constructional quality acceptance of building engineering”, which was revised jointly by appropriate organizations with the Ministry of Construction playing the leading role, and subject to the joint review of relevant departments, has been approved to become a national standard with the code number GB 50300-2001, to be implemented as of January 1, 2002. In this standard, articles 3.0.3, 5.0.4, 5.0.7, 6.0.3, 6.0.4 and 6.0.7 are mandatory articles, which must be executed in a strict manner. The former GBJ 300-88 “Unified standard for quality inspection and assessment of building and installation engineering” shall be annulled at the same time. The Ministry of Construction shall be responsible for the administration of this standard, the Chinese Building Science Research Institute shall be responsible for the specific interpretation, and the Standard and Ration Research Institute of the Ministry of Construction shall organize the publishing and issuance by the Chinese Building Industry Publishing House. The Ministry of Construction of the People’s Republic of China July 20, 2001 GB 50300－2001 — 2 — PREFACE This standard is compiled pursuant to the “Notice of Issuing the 1998 Formulation and Amendment Plan for National Standards on Engineering Construction (second batch)” (Jian Biao [1998] No. 244) of the Ministry of Construction, by the Chinese Research Institute of Building Science with joint efforts of appropriate organizations including the Project Construction Quality Supervision Division of the Chinese Building Industry Association. During compilation of this standard, the compilation group made extensive investigation and study, summed up the practical experience of our country in the construction quality acceptance of building engineering, adhered to the guiding ideology of “separate acceptance and assessment, strengthen acceptance, improve measures and perform in-process control”, and widely solicited comments from appropriate organizations. The draft was reviewed and finalized in October 2000 by the Ministry of Construction. This compilation is to combine the codes for construction and acceptance of building engineering and the standards for inspection and assessment of engineering quality to form a new system of engineering quality acceptance codes, aiming to unify the acceptance methods, quality standards and procedures. This standard defines the unified guidelines for the compilation of construction acceptance codes for each discipline of building engineering, and the quality standards, contents and procedures for unit works. Construction site quality management and quality control requirements are added for building engineering. The sampling scheme requirement is proposed for the quality inspection of inspection lots. The standard has defined the division of sub-unit and sub-portioned works in the construction quality acceptance of building engineering, and the witness sampling and sample testing in relation to safety and major utilization functions of building engineering. The codes for acceptance of construction quality for each discipline in construction works must be applied in combination with this standard. This standard will likely be subject to partial revision, the information and content of which will be published in the “Standardization for Project Construction” magazine. In this standard, articles highlighted in bold letters are mandatory articles, which must be executed in a strict manner. In order to improve the quality of this standard, all users of this standard are requested to pay attention to accumulating data and summing up experience in the course of executing the standard. In case of need for revision and supplement identified, please send your comments and appropriate data to the National Center of Quality Supervision and Inspection of Building Engineering at the Chinese Research Institute of Building Science (address: 30 East Sanhuan Road, Beijing, 100013) for reference in the future www.bzfxw.com GB 50300－2001 — 3 — revision. Principal compilation organization: Chinese Research Institute of Building Science Participating organizations: Project Construction Quality Supervision Division of the Chinese Building Industry Association National Center of Quality Supervision and Inspection of Building Engineering Beijing Municipal Quality Supervision Division of Building Engineering Beijing Municipal Construction Group Company Limited Tianjin Municipal Quality Supervision and Administration Division of Building Engineering Shanghai Municipal Quality Supervision Division of Construction Projects Shenzhen Quality Supervision and Inspection Division of Construction Projects Sichuan Huashi Group Corporation Shaanxi Building Engineering Corporation The PLA Engineering Qua;ity Supervision Division Main draftspersons: WU songqin GAO Xiaowang HE Xinhua BAI Shengxiang XU Youlin GE Hengyue LIU Guoqi WANG Huiming ZHU Mingde YANG Nanfang LI Zixin ZHANG Hongxun LIU Jian The Ministry of Construction July 2001 www.bzfxw.com GB 50300－2001 — 4 — CONTENTS 1. General Provisions……………………………………………………………………5 2. Glossary………………………………………………………………………………5 3. Basic Provisions………………………………………………………………………7 4. Division for Quality Acceptance of Building Engineering…………………………9 5. Quality Acceptance of Building Engineering………………………………………10 6. Procedures and Organizations for Building Engineering Quality Acceptance……11 Appendix A Inspection Records for Quality Management at Construction Site……13 Appendix B Division of Portioned (Sub-portioned) Works and Itemized Works of Building Engineering……………………………………………………14 Appendix C Division of Exterior Works………………………………………………21 Appendix D Quality Acceptance Records for Inspection Lots………………………22 Appendix E Quality Acceptance Records for Itemized Works………………………23 Appendix F Quality Acceptance Records for Portioned (Sub-portioned) Works…24 Appendix G Final Quality Acceptance Records for Unit (Sub-unit) Works………25 Explanation of Wording in This Standard………………………………………………30 GB 50300－2001 — 5 — 1 General Provisions 1.0.1 This standard is formulated with a view to strengthen the quality management of building engineering, unify the quality acceptance of building engineering, and guarantee the engineering quality. 1.0.2 This standard is applicable to the acceptance of construction quality of building engineering, and serves as a unified guideline for the development of codes for project construction quality acceptance by each discipline in construction projects. 1.0.3 This standard is developed in accordance with the current laws, regulations and administrative standards of the state, and relevant technical standards. The codes for acceptance of construction quality for each discipline in construction works must be applied in combination with this standard. 2 Glossary 2.0.1 building engineering Various technical work and completed physical works in terms of planning, survey, design, construction and completion carried out for newly built, rebuilt or expanded house buildings and auxiliary structure facilities. 2.0.2 quality of building engineering Summary of characteristics reflecting compliance of the building engineering with relevant standards or contractual agreements, including all its explicit or implicit capabilities in respect of safety, functionality, durability performance and environmental protection. 2.0.3 acceptance Based on the self quality inspection and assessment of building engineering by the construction contractor, participating units of building activities to jointly conduct sampling quality re-validation of the inspection lot, item, portion and unit works, and make confirmation in written form in accordance with pertinent standards as to whether GB 50300－2001 — 6 — the building engineering has reached the acceptable level. 2.0.4 site acceptance Conducting inspection on the materials, components, accessories and equipment that enter the construction site in accordance with relevant standards, and making confirmation as to whether the products have reached the acceptable level. 2.0.5 inspection lot Objects for inspection consisting of samples in certain amount, which are produced under the same production conditions or summarized in the specified manner for inspection use. 2.0.6 inspection Activities conducted to measure, check and test the properties of the inspection item, and to compare the results with standard stipulations so as to determine whether each property is acceptable. 2.0.7 evidential testing Testing conducted under the supervision of the supervision unit or the owner, in which appropriate personnel of the construction contractor take samples at the site and send them to a testing unit with relevant qualification. 2.0.8 handing over inspection Activity in which both the accepting party and the party that has completed the construction make confirmation by joint inspection as to whether the construction can be proceeded with. 2.0.9 dominant item An inspection item in building engineering that plays a decisive role in safety, health, environmental protection and public interest. 2.0.10 general item An inspection item other than dominant items. 2.0.11 sampling inspection An inspection in which a certain number of samples are randomly taken by the GB 50300－2001 — 7 — inspection lot from the inspection items of materials, components, accessories and equipment that enter the site or of building engineering, according to the specified sampling scheme. 2.0.12 sampling scheme Quantity and method determined according to the characteristics of the inspection item. 2.0.13 counting inspection An inspection method by which, in the samples taken, certain property of each individual is recorded or the number of defects in each individual is calculated. 2.0.14 quantitative inspection An inspection method by which, in the samples for sampling inspection, certain quantitative property of each individual is measured. 2.0.15 quality of appearance Visual quality of engineering revealed by means of observation and necessary measuring. 2.0.16 repair To take corrective measures for any part of engineering that is not in conformity with standards. 2.0.17 rework Measures of re-fabrication and re-construction taken for non-conforming engineering parts. 3 Basic Provisions 3.0.1 Quality management at the construction site shall be accompanied or supported by relevant construction technical standards, complete quality management system, construction quality inspection system and comprehensive construction quality level assessment system. GB 50300－2001 — 8 — For quality management at the construction site, inspection and records can be made according to the requirement of Appendix A. 3.0.2 Construction quality control for building engineering shall be exercised in accordance with the following stipulations: 1. Main materials, half finished products, finished products, building components and accessories, apparatuses and equipment to be used in building engineering shall be subject to site inspection. Products involved in safety and functions shall be subject to re-inspection in compliance with acceptance codes of engineering quality of each discipline, and to the inspection and approval of supervision engineers (owner’s technical responsible personnel). 2. Each construction step shall be subject to quality control in accordance with the construction technical standards, and each construction step shall be inspected after its completion. 3. Hand-over inspection shall be conducted between interrelated disciplinary categories of work, with inspection records properly established. It is not allowed to proceed to the succeeding construction step until the preceding step has been inspected and approved by supervision engineers (owner’s technical responsible personnel). 3.0.3 The construction quality of building engineering shall be subject to acceptance inspection as required below: 1. The construction quality of building engineering shall be in compliance with the stipulations of this standard and acceptance codes of relevant disciplines. 2. Construction of building engineering shall meet the requirements of the engineering survey and design documents. 3. All the members participating in the quality acceptance of building engineering shall possess appropriate qualifications. 4. Acceptance inspection of engineering quality shall be conducted on the basis of the construction contractor’s own inspection and assessment. 5. Before concealing of concealed works, the construction contractor shall notify relevant units to carry out the acceptance inspection, and establish acceptance documents. 6. Test coupons, test pieces and relevant materials involved in structural GB 50300－2001 — 9 — safety shall be subject to witness sampling test as required. 7. The quality of inspection lots shall be subject to acceptance according to dominant items and general items. 8. Important portioned works involved in structural safety and utilization functions shall be subject to sample testing. 9. Units undertaking the witness sampling test and structural safety test shall possess respective qualifications. 10. The appearance quality of engineering shall be subject to site inspection by acceptance personnel and confirmed jointly. 3.0.4 The sampling scheme for the quality inspection of inspection lots shall be chosen from the following according to the characteristics of inspection items: 1. Sampling schemes of measuring, counting, or measuring-counting. 2. Single sampling, double sampling and multiple sampling schemes. 3. According to the situation of production continuity and production control stability, the adjusted sampling scheme may also be adopted. 4. For important inspection items, when a simple and quick inspection method is adopted, the full quantity inspection scheme can be selected. 5. Inspection schemes that are proved effective by practical experience. 3.0.5 During formulation of the sampling scheme for inspection lots, the production party’s risk (probability for erroneous judgment α) and the utilization party’s risk (probability for neglecting judgment β) can be specified as follows: 1. Dominant item: both α and β corresponding to the acceptable quality level should not exceed 5%. 2. General item: corresponding to the acceptable quality level, α should not exceed 5% and β should not exceed 10%. GB 50300－2001 — 10 — 4 Division for Quality Acceptance of Building Engineering 4.0.1 In the quality acceptance, the building engineering shall be divided into unit (sub-unit) works, portioned (sub-portioned) works, itemized works and inspection lot. 4.0.2 Division of unit works shall be defined according to the following principles: 1. A building or structure that possesses independent construction conditions and is capable of forming independent utilization functions shall be taken as a unit work. 2. For a unit work with a large building scale, the part that is capable of forming independent utilization functions can be taken as sub-unit work. 4.0.3 Division of portioned works shall be defined according to the following principles: 1. Division of portioned works shall be defined according to the disciplinary nature and locations in building. 2. When the portioned work is large or complex, it can be divided into several sub-portioned works according to the category of materials, characteristics of construction, construction procedures, disciplinary system and classification. 4.0.4 Itemized works shall be divided according to their major labor category, material, construction process and equipment classification. Portioned (sub-portioned) works and itemized works of building engineering can be divided in accordance with Appendix B of this standard. 4.0.5 Itemized works may consist of one or several inspection lots, and the inspection lots may be divided according to the floor, construction section and deformation joint considering the requirements of construction and quality control as well as disciplinary acceptance. 4.0.6 Exterior works may be divided into unit (sub-unit) works according to the disciplinary category and the engineering scale. Exterior unit (sub-unit) works and portioned works may be divided in accordance with Appendix C of this standard. GB 50300－2001 — 11 — 5 Quality Acceptance of Building Engineering 5.0.1 The acceptable quality of inspection lots shall be in compliance with the following: 1. The quality of dominant items and general items is deemed acceptable by sample testing. 2. Complete construction operation basis and quality inspection records are available. 5.0.2 The successful quality acceptance of itemized works shall be in compliance with the following: 1. All the inspection lots contained in the itemized works are in compliance with the stipulations for acceptable quality. 2. The quality acceptance records for the inspection lots contained in the itemized works shall be complete. 5.0.3 The successful quality acceptance of portioned (sub-portioned) works shall be in compliance with the following: 1. All the itemized works contained in the portioned (sub-portioned) works have been deemed acceptable for quality acceptance. 2. The quality control data shall be complete. 3. Safety and function related testing and sample testing results for portioned works of ground foundations, principal structures and equipment installation shall meet relevant regulations. 4. The appearance quality acceptance shall meet requirements. 5.0.4 The successful quality acceptance of unit (sub-unit) works shall be in compliance with the following: 1. All the portioned (sub-portioned) works contained in the unit (sub-unit) works have been deemed acceptable for quality acceptance. GB 50300－2001 — 12 — 2. The quality control data shall be complete. 3. The sample testing results of major function items shall meet the quality acceptance codes of respective disciplines. 4. The appearance quality acceptance shall meet requirements. 5.0.5 The quality acceptance records of building engineering shall comply with the following: 1. The quality acceptance for inspection lots may be conducted according