This specification is applicable to the acceptance of the construction quality of steel structures such as single-layer, multi-layer, high-rise buildings, grids, corrugated metal plates, etc. GB 50205-2001 Standard for Acceptance of Construction Quality of Steel Structures GB50205-2001 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
502052001
Code for acceptance of construction quality of steel structures
Code for acceptance of construction quality of steel structures2002—01-10Published
2002—03—01
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaMinistry of Construction of the People's Republic of China
Jointly issued
Page 1
National Standard of the People's Republic of China
Code for acceptance of construction quality of steel structuresGB
50205—2001
Editing department: Ministry of Construction of the People's Republic of ChinaApproving department: Ministry of Construction of the People's Republic of ChinaEffective date: March 2002
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Notice on the promulgation of the national standard
Code for Acceptance of Construction Quality of Steel Structure Engineering
Jianbiao No. 2002111
According to the requirements of our Ministry's "Notice on Issuing the "National Standard Formulation and Revision Plan for Engineering Construction from 2000 to 2001" (Jianbiao [2001187]), the "Code for Acceptance of Construction Quality of Steel Structure Engineering" revised by the General Research Institute of Construction of the Ministry of Metallurgical Industry and relevant units has been reviewed and approved as a national standard by relevant departments, with the number GB50205-2001, and will be implemented on March 1, 2002. Among them, 4.2.1, 4.3.1, 4.4.1, 5.2.2, 5.2.4, 6.3.1, 8.3.1, 10.3.4, 11.3.5, 12.3.4, 14.2.2, 14.3.3 are mandatory provisions and must be strictly enforced. The original "Steel Structure Engineering Construction and Acceptance Code" GB50205-95 and "Steel Structure Engineering Quality Inspection and Assessment Standard" GB50221-95 are abolished at the same time. The Ministry of Construction is responsible for the management and interpretation of the mandatory provisions of this code, the Ministry of Metallurgical Industry's Construction Research Institute is responsible for the interpretation of the specific technical content, and the Ministry of Construction's Standard and Quota Research Institute organizes China Planning Press to publish and distribute it. Ministry of Construction of the People's Republic of China
January 10, 2002
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This specification is revised by the Ministry of Construction of the People's Republic of China, the Ministry of Construction of the People's Republic of China, and the Ministry of Construction of the People's Republic of my country, in accordance with the requirements of the Notice on Issuing the National Standard Formulation and Revision Plan for Engineering Construction in 2000-20187, and the Ministry of Construction of the People's Republic of China, ...
This specification is divided into 15 chapters, including general principles, terms, symbols, basic regulations, raw materials and finished products on-site, welding engineering, fastener connection engineering, steel parts and steel component processing engineering, steel component assembly process, steel component pre-assembly engineering, single-layer steel structure installation engineering, multi-layer and high-rise steel structure installation engineering, steel grid structure installation engineering, corrugated metal sheet engineering, steel structure painting engineering, steel structure sub-project completion acceptance and 9 appendices. In principle, the steel structure project is divided into 10 sub-projects, and each sub-project is a separate chapter. Although "raw materials and finished products on-site" is not a sub-project, it is listed in a separate chapter to emphasize and strengthen the access to raw materials and finished products on-site, and to ensure quality control from the source. "Steel structure sub-project acceptance" is listed in a separate chapter to facilitate the operation of quality acceptance work.
This specification may need to be partially revised in the future. The information and content of the relevant partial revisions will be published in the "Engineering Construction Standardization" magazine.
The provisions marked in bold in this specification are mandatory provisions. In order to improve the quality of the specification, each unit should pay attention to summarizing experience and accumulating data in the process of implementing this specification, and feedback relevant opinions and suggestions to the Construction Research Institute of the Ministry of Metallurgical Industry (No. 33, Xitucheng Road, Haidian District, Beijing, Postal Code 100088) at any time for reference in future revisions. The main editor, participating units and main drafters of this specification are: Main editor: Construction Research Institute of the Ministry of Metallurgical Industry Participating units: Wuhan Iron and Steel Metal Structure Co., Ltd. Beijing Iron and Steel Design and Research Institute
China Jingye Construction Engineering Contracting Co., Ltd.
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Beijing Yuanda Construction Supervision Co., Ltd. China Construction Third Engineering Bureau Shenzhen Jianshenghe Steel Structure Building Installation Engineering Co., Ltd. Beijing Mechanical Construction Company
Zhejiang Hangxiao Steel Structure Co., Ltd.
China Construction First Engineering Bureau Steel Structural Engineering Co., Ltd.
Shandong Zhucheng High Strength Fastener Co., Ltd. Zhejiang Jinggong Steel Structure Co., Ltd.
Hilti (China) Co., Ltd.
Main drafters: Hou Zhaoxin He Fentao
Yu Zhichuo
He Xianjuan Lu Kekuan
Chen Guojin
Yin Minda
Wang Wentao
He Qiaosheng
Liu Jingfeng
Ma Naiguang Li Haifeng
Qian Weijun
The 5 pages
2 Terms and symbols
Basic provisions
Raw materials and finished products entering the site
General provisions
Connecting materials
Standard fasteners for connection
Sealing plates, cone heads and sleeves,
Metal profiled plates
Coating materials
5Steel structure welding engineering,
General provisions
Steel component welding engineering
Nail (bolt) welding engineering
6Fastener connection Connection engineering...
General provisions
Ordinary fastener connection..
High-strength bolt connection
Steel parts and steel component processing engineering
General provisions
Straightening and forming
Page 6
Straightening and forming
Edge processing
Tube and ball processing
8Steel component assembly engineering..
General provisions
Welding H-beam.
End milling and installation Installation of weld groove
Steel member dimensions
9Steel member pre-assembly engineering
General provisions.
Pre-assembly
Single-layer steel structure installation engineering
General provisions.
Foundation and supporting surface,
Installation and correction
11Multi-layer and high-rise steel structure installation engineering
General provisions
Foundation and supporting surface.
Installation and correction
Steel grid structure installation engineering.
General provisions
Bearing surface top plate and bearing pad
12.3 Overall assembly and installation,
13 Corrugated metal sheet engineering
General provisions
Corrugated metal sheet production
13.3 Corrugated metal sheet installation.
14 Steel structure painting engineering
General provisions
....33
Page 7
Steel structure anti-corrosion coating
Steel structure fire retardant coating Material coating
15 Acceptance of steel structure sub-projects
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Appendix J
Weld appearance quality standards and size tolerances Fastener connection project inspection items
Allowable deviation of steel component assembly
Allowable deviation of steel component pre-assembly,|| tt||Allowable deviation of steel structure installation
Method for measuring thickness of fire retardant coating on steel structure Inspection and witnessing test items related to safety and function of steel structure engineering….Visual quality inspection items related to steel structure engineering Inspection batch quality acceptance record form of steel structure sub-project Explanation of terms used in this specification
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1 General
1.0.1 This specification is formulated to strengthen the quality management of construction projects, unify the acceptance of the construction quality of steel structure projects, and ensure the quality of steel structure projects.
1.0.2 This specification is applicable to the acceptance of the construction quality of single-story, multi-story, high-rise, grid, corrugated metal plate and other steel structure projects in construction projects.
1.0.3 The requirements for construction quality acceptance in the engineering technical documents and contract documents used in the construction of steel structure projects shall not be lower than those specified in this code.
1.0.4 This code shall be used in conjunction with the current national standard "Uniform Standard for Construction Quality Acceptance of Building Projects" GB50300.
1.0.5 In addition to the provisions of this code, the acceptance of the construction quality of steel structure projects shall also comply with the provisions of the current relevant national standards.
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2.1.1 Part
2 Terms and symbols
2.1 TermswwW.bzxz.Net
The smallest unit of a component or member, such as a node plate, flange plate, etc. 2.1.2 Component
A unit composed of several parts, such as welded H-shaped steel, corbel, etc. 2.1.3 Component
A basic unit of steel structure composed of parts or parts and components, such as beams, columns, supports, etc. 2.1.4 The smallest assembled rigid unit The smallest assembled rigid unit In the steel truss structure installation project, the smallest installation unit other than the loose parts is generally divided into two types: plane truss and cone.
2.1.5 Intermediate assembled structure In the steel truss structure installation project, the installation unit composed of loose parts and small assembled units is generally divided into two types: strip and block.
2.1.6 Set of high strength bolt The general term for high strength bolts and nuts and washers that match them. 2.1.7 Slip coefficient slip coefficient off aying surface In the high strength bolt connection, the ratio of the external force that causes the friction surface of the connection to slide to the sum of the pre-tension of the high strength bolts perpendicular to the friction surface.
2.1.8 Test assembly
Assembly to test whether the components meet the installation quality requirements. 2.1.9 Space rigid unit space rigid unit The basic stable space system composed of components. 2.1.10 Stud welding Stud welding is a method of welding by contacting one end of the stud with the surface of the plate (or pipe fitting), energizing and striking an arc, and applying a certain pressure to the stud after the contact surface melts. 2.1.11 Ambient temperature ambienttemperature The temperature on site during production or installation.
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2.2.1 Action and effect
P- Design pretension of high-strength bolts
2.2 Symbols
△P- Loss value of pretension of high-strength bolts I- Inspection torque of high-strength bolts
T. - Final tightening torque of high-strength bolts
T. 1. Initial torque of high-strength bolts
2.2.2 Geometric parameters
a. Spacing
b. Width or free overhanging width of plate
d. Diameter
e. Eccentricity
Factory deflection, bending rise
H. Column height
H. Height of each floor
h. Section height
he. Calculated thickness of fillet weld
1. Length, span
Ra. Arithmetic mean deviation of profile (surface roughness parameter) r— Radius
t-thickness of plate and wall
△-increment
2.2.3Others
K-coefficient
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3Basic provisions
3.0.1The construction unit of steel structure engineering shall have the corresponding qualification for steel structure engineering construction. The quality management of the construction site shall have the corresponding construction technical standards, quality management system, quality control and inspection system. The construction site shall have technical documents such as construction organization design and construction plan approved by the project technical person in charge. 3.0.2 The acceptance of the construction quality of steel structure engineering must use measuring instruments that have been verified and calibrated. 3.0.3 The construction quality control of steel structure engineering shall be carried out in accordance with the following provisions: 1 The raw materials and finished products used shall be inspected upon arrival. All raw materials and finished products involving safety and function shall be re-inspected in accordance with the provisions of this specification, and the sampling and delivery shall be witnessed by the supervision engineer (technical person in charge of the construction unit); 2 Each process shall be subject to quality control in accordance with the construction technical standards, and an inspection shall be carried out after each process is completed. 3 Handover inspection shall be carried out between relevant professional types of work, and shall be inspected and approved by the supervision engineer (technical person in charge of the construction unit).
3.0.4 The quality acceptance of steel structure construction shall be carried out on the basis of self-inspection by the construction unit, in accordance with inspection batches, sub-projects, and sub-divisions (sub-divisions). The division of sub-projects in steel structure sub-divisions (sub-divisions) shall be carried out in accordance with the provisions of the current national standard "Uniform Standard for Construction Quality Acceptance of Building Engineering" GB50300. Steel structure sub-projects shall consist of one or more inspection batches, and the inspection batches of each sub-project shall be divided in accordance with the provisions of this specification. 3.0.5 The qualified quality standards for inspection batches of sub-projects shall comply with the following provisions: 1. The main control items must meet the requirements of the qualified quality standards of this specification; 2. The inspection results of general projects should have 80% or more of the inspection points (values) meet the requirements of the qualified quality standards of this specification, and the maximum value should not exceed 1.2 times its allowable deviation value. 3. Quality inspection records, quality certification documents and other materials should be complete. The qualified quality standards for sub-projects shall comply with the following provisions: 3.0.6
Each inspection batch contained in the sub-project shall comply with the qualified quality standards of this specification: 1
2The quality acceptance records of each inspection batch contained in the sub-project shall be complete. 3.0.7
When the construction quality of steel structure engineering does not meet the requirements of this code, it shall be handled in accordance with the following provisions: 1. The inspection batch that has been reworked or replaced with components (accessories) shall be re-accepted; 2. The inspection batch that has been tested and identified by a qualified testing unit and can meet the design requirements shall be accepted; 3. The inspection batch that has not met the design requirements after being tested and identified by a qualified testing unit, but can meet the structural safety and use functions after calculation and approval by the original design unit, can be accepted; 4. The sub-items and sub-projects that have been repaired or reinforced can still meet the safety requirements of use even if the external dimensions are changed. Page 122 Symbols
△P-loss value of pre-tension of high-strength bolts I-high-strength bolt inspection torque
T. -high-strength bolt final tightening torque
T. -high-strength bolt initial torque
2.2.2 Geometric parameters
a-spacing
b-width or free overhanging width of plate
d-diameter
e-eccentricity
factory deflection, bending rise
H-column height
H-height of each floor
h-section height
he-calculated thickness of fillet weld
-length, span
Ra-arithmetic mean deviation of profile (surface roughness parameter) r- Radius
t-thickness of plate and wall
△-increment
2.2.3Others
K-coefficient
Page 11
3Basic provisions
3.0.1The construction unit of steel structure engineering shall have the corresponding qualification for steel structure engineering construction. The quality management of the construction site shall have the corresponding construction technical standards, quality management system, quality control and inspection system. The construction site shall have technical documents such as construction organization design and construction plan approved by the project technical person in charge. 3.0.2 The acceptance of the construction quality of steel structure engineering must use measuring instruments that have been verified and calibrated. 3.0.3 The construction quality control of steel structure engineering shall be carried out in accordance with the following provisions: 1 The raw materials and finished products used shall be inspected upon arrival. All raw materials and finished products involving safety and function shall be re-inspected in accordance with the provisions of this specification, and the sampling and delivery shall be witnessed by the supervision engineer (technical person in charge of the construction unit); 2 Each process shall be subject to quality control in accordance with the construction technical standards, and an inspection shall be carried out after each process is completed. 3 Handover inspection shall be carried out between relevant professional types of work, and shall be inspected and approved by the supervision engineer (technical person in charge of the construction unit).
3.0.4 The quality acceptance of steel structure construction shall be carried out on the basis of self-inspection by the construction unit, in accordance with inspection batches, sub-projects, and sub-divisions (sub-divisions). The division of sub-projects in steel structure sub-divisions (sub-divisions) shall be carried out in accordance with the provisions of the current national standard "Uniform Standard for Construction Quality Acceptance of Building Engineering" GB50300. Steel structure sub-projects shall consist of one or more inspection batches, and the inspection batches of each sub-project shall be divided in accordance with the provisions of this specification. 3.0.5 The qualified quality standards for inspection batches of sub-projects shall comply with the following provisions: 1. The main control items must meet the requirements of the qualified quality standards of this specification; 2. The inspection results of general projects should have 80% or more of the inspection points (values) meet the requirements of the qualified quality standards of this specification, and the maximum value should not exceed 1.2 times its allowable deviation value. 3. Quality inspection records, quality certification documents and other materials should be complete. The qualified quality standards for sub-projects shall comply with the following provisions: 3.0.6
Each inspection batch contained in the sub-project shall comply with the qualified quality standards of this specification: 1
2The quality acceptance records of each inspection batch contained in the sub-project shall be complete. 3.0.7
When the construction quality of steel structure engineering does not meet the requirements of this code, it shall be handled in accordance with the following provisions: 1. The inspection batch that has been reworked or replaced with components (accessories) shall be re-accepted; 2. The inspection batch that has been tested and identified by a qualified testing unit and can meet the design requirements shall be accepted; 3. The inspection batch that has not met the design requirements after being tested and identified by a qualified testing unit, but can meet the structural safety and use functions after calculation and approval by the original design unit, can be accepted; 4. The sub-items and sub-projects that have been repaired or reinforced can still meet the safety requirements of use even if the external dimensions are changed. Page 122 Symbols
△P-loss value of pre-tension of high-strength bolts I-high-strength bolt inspection torque
T. -high-strength bolt final tightening torque
T. -high-strength bolt initial torque
2.2.2 Geometric parameters
a-spacing
b-width or free overhanging width of plate
d-diameter
e-eccentricity
factory deflection, bending rise
H-column height
H-height of each floor
h-section height
he-calculated thickness of fillet weld
-length, span
Ra-arithmetic mean deviation of profile (surface roughness parameter) r- Radius
t-thickness of plate and wall
△-increment
2.2.3Others
K-coefficient
Page 11
3Basic provisions
3.0.1The construction unit of steel structure engineering shall have the corresponding qualification for steel structure engineering construction. The quality management of the construction site shall have the corresponding construction technical standards, quality management system, quality control and inspection system. The construction site shall have technical documents such as construction organization design and construction plan approved by the project technical person in charge. 3.0.2 The acceptance of the construction quality of steel structure engineering must use measuring instruments that have been verified and calibrated. 3.0.3 The construction quality control of steel structure engineering shall be carried out in accordance with the following provisions: 1 The raw materials and finished products used shall be inspected upon arrival. All raw materials and finished products involving safety and function shall be re-inspected in accordance with the provisions of this specification, and the sampling and delivery shall be witnessed by the supervision engineer (technical person in charge of the construction unit); 2 Each process shall be subject to quality control in accordance with the construction technical standards, and an inspection shall be carried out after each process is completed. 3 Handover inspection shall be carried out between relevant professional types of work, and shall be inspected and approved by the supervision engineer (technical person in charge of the construction unit).
3.0.4 The quality acceptance of steel structure construction shall be carried out on the basis of self-inspection by the construction unit, in accordance with inspection batches, sub-projects, and sub-divisions (sub-divisions). The division of sub-projects in steel structure sub-divisions (sub-divisions) shall be carried out in accordance with the provisions of the current national standard "Uniform Standard for Construction Quality Acceptance of Building Engineering" GB50300. Steel structure sub-projects shall consist of one or more inspection batches, and the inspection batches of each sub-project shall be divided in accordance with the provisions of this specification. 3.0.5 The qualified quality standards for inspection batches of sub-projects shall comply with the following provisions: 1. The main control items must meet the requirements of the qualified quality standards of this specification; 2. The inspection results of general projects should have 80% or more of the inspection points (values) meet the requirements of the qualified quality standards of this specification, and the maximum value should not exceed 1.2 times its allowable deviation value. 3. Quality inspection records, quality certification documents and other materials should be complete. The qualified quality standards for sub-projects shall comply with the following provisions: 3.0.6
Each inspection batch contained in the sub-project shall comply with the qualified quality standards of this specification: 1
2The quality acceptance records of each inspection batch contained in the sub-project shall be complete. 3.0.7
When the construction quality of steel structure engineering does not meet the requirements of this code, it shall be handled in accordance with the following provisions: 1. The inspection batch that has been reworked or replaced with components (accessories) shall be re-accepted; 2. The inspection batch that has been tested and identified by a qualified testing unit and can meet the design requirements shall be accepted; 3. The inspection batch that has not met the design requirements after being tested and identified by a qualified testing unit, but can meet the structural safety and use functions after calculation and approval by the original design unit, can be accepted; 4. The sub-items and sub-projects that have been repaired or reinforced can still meet the safety requirements of use even if the external dimensions are changed. Page 12
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