GB 50205-1995 Code for Construction and Acceptance of Steel Structure Engineering GB50205-1995 Standard download decompression password: www.bzxz.net

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National Standard of the People's Republic of China
GB50205-95
Code for construction and acceptance of steel structure engineering
1995—03-18
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
1995-11-01Implementation
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for construction and acceptance of steel structure engineeringGB50205-95
Editor department: Hubei Provincial Planning Commission
Approval department: Ministry of Construction of the People's Republic of China Implementation date: November 1, 1995
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of the national standard "Steel Structure Engineering Construction and Acceptance Code"
"
Construction Standard [1995] No. 154
According to the requirements of the State Planning Commission's Document No. [1991] 290, the "Steel Structure Engineering Construction and Acceptance Code" revised by the Hubei Provincial Planning Commission and relevant departments has been reviewed by relevant departments and is now approved as a mandatory national standard for "Steel Structure Engineering Construction and Acceptance Code" GB50205-95, which will be implemented on November 1, 1995. The original "Steel Structure Engineering Construction and Acceptance Code" GBJ205-83 will be abolished at the same time.
This standard is managed by the Hubei Provincial Planning Commission, and its specific interpretation and other work is the responsibility of the Hubei Provincial Construction Engineering Corporation. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
March 18, 1995
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Terminology, Symbols, Codes
2.2 Symbols, Codes
4 Fabrication of Steel Components
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Lofting, Numbering and Cutting
4.2 Straightening and Forming
Edge Processing
Tube-ball Node Processing
Welding and Welding Inspection
Welded H-beam
End Milling||t t||Friction surface treatment
Painting and numbering
Acceptance of steel components
Pre-assembly in the factory
Packaging and shipment
Installation of steel structures
General provisions
5.2 Foundation and supporting surface
5.3 Transportation and storage of steel components
5.4 Installation and correction·
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5.5 Installation of high-rise steel structures
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5.6 Connection and fixingWww.bzxZ.net
.． ·Installation deviation detection
6 Project acceptance
Appendix A
Appendix B
Appendix C
Appendix D
Allowable values ​​of minimum radius of curvature and maximum bending sagitta for cold straightening and cold bending
Allowable deviation of overall dimensions of steel members
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Allowable deviation of steel structure installation
Explanation of terms used in this specification
Additional instructions
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1 General provisions
This specification is formulated to implement the national technical and economic policies in the construction of steel structure projects, ensure the quality of project construction, and achieve advanced technology, economic rationality, safety and applicability.
This specification applies to steel structure engineering for industrial and civil buildings and general structures. 1.0.3
3The manufacture and installation of steel structures shall comply with the requirements of the construction drawing design and the provisions of this specification. When the design needs to be modified, the consent of the original design unit shall be obtained and the design change document shall be signed.
1.0.4Before the construction of steel structure engineering, the manufacturing and installation units shall prepare the manufacturing process and installation construction organization design according to the requirements of the construction drawing design. 1.0.5
5The manufacture and installation of steel structures shall be carried out according to the process requirements and the construction organization design; and the process inspection shall be implemented. When the previous process is qualified, the next process can be constructed.
3The construction and acceptance of steel structure engineering shall use measuring instruments that have passed the measurement verification and shall be operated in accordance with relevant regulations.
1.0.7In the construction of steel structure engineering, in addition to implementing the provisions of this specification, it shall also comply with the provisions of the relevant current national standards and specifications. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Terms, Symbols, Codes
2.1.1 Part
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-beams, corbels, etc. 2.1.3
3 Component
The basic unit of steel structure composed of parts or parts and components, such as beams, columns, supports, etc.
Set of high strength bolt The general term for high strength bolts and the nuts and washers that match them. 2.1.5 Slip factor
In high strength bolt connections, 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. 2.1.6 Testassembling
Assembly to test whether the components meet the installation quality requirements. 2.1.7 Space rigid unit spacerigidunit Basic stable space system composed of components. 2.1.8 Stud welding
A method of welding by contacting one end of the welding nail (stud) with the surface of the plate (or pipe fitting), energizing and striking the arc, and applying a certain pressure to the welding nail (stud) after the contact surface melts. 2.1.9 Warping
Combined deformation of steel structure components including linear displacement and angular displacement. 2.1.10 Ambient temperatureambienttemperatureThe temperature at the site during production or installation.
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Engineering Construction Standards Full-text Information System
Symbols, codes
Engineering Construction Standards Full-text Information System
Symbols,
Width or free overhang width of plate
Eccentricity
Deflection, bending sagitta
Column height
Height of each floor
Section height
Effective thickness of fillet weld
Length, span
Design pretension of high-strength bolts
Pretension loss value
Arithmetic mean deviation of profile (
(Surface roughness parameter)
Final torque of high-strength bolts
Inspection torque of high-strength bolts
Initial tightening torque of high-strength bolts
Thickness of plate and wall||t t||Engineering Construction Standard Full Text Information System
3 Materials
This chapter applies to Q235 steel specified in the current national standard "Carbon Structural Steel", 16Mn steel and 15MnV steel specified in "Low Alloy Structural Steel", and 16Mnq steel and 15MnVq steel specified in "Bridge Structural Steel".
2 The steel used in steel structure projects shall have a quality certificate and shall meet the design requirements.
When there is doubt about the quality of steel, sampling inspection shall be carried out in accordance with the provisions of the current relevant national standards.
3.0.3 In addition to complying with the provisions of the current relevant national standards, the surface quality of steel shall also comply with the following provisions:
3.0.3.1 When there are defects such as rust, pitting or scratches on the surface of steel, the depth shall not be greater than 1/2 of the negative deviation value of the thickness of the steel; 3.0.3.2
The rust level of steel surface shall comply with the A, B and C levels specified in the current national standard "Rust level and rust removal level of steel surface before painting"; 3.0.4 The connection materials and coating materials used in steel structure projects shall have factory quality certificates and shall comply with the design requirements and the provisions of the current relevant national standards. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Manufacturing of Steel Components
4.1 Lofting, Numbering and Cutting
Lofting and numbering shall reserve welding shrinkage allowances during production and installation and processing allowances such as cutting, planing and milling according to process requirements. 2 The allowable deviation of lofting and sample (sample rod) shall comply with the provisions of Table 4.1.2. 4.1.2
Allowable deviation items for layout and sample (sample bar)
Parallel line distance and segment size
Diagonal difference
Width, length
Angle of processing sample
Allowable deviation
Allowable deviation of No. material shall comply with the provisions of Table 4.1.3. Allowable deviation of No. material (mm)
Part outer dimensions
Allowable deviation
Rust, dirt, etc. on the surface of the steel cutting area should be cleaned before gas cutting, and slag and splashes should be removed after gas cutting. The allowable deviation of gas cutting shall comply with the provisions of Table 4.1.5. 4.1.5
Allowable deviation of gas cutting (mm)
Part width, length
Flatness of cutting surface
Depth of cutting pattern
Depth of local notch
Note: t is the thickness of the cutting surface.
Allowable deviation
0.05t and not more than 2.0
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4.1.6For mechanically sheared parts, the steel pole thickness should not be greater than 12.0mm, and the shearing surface should be flat.
The allowable deviation of mechanical shearing shall comply with the provisions of Table 4.1.6. Allowable deviation of mechanical shearing (mm)
Part width and length
Edge missing edges
Verticality of steel end
Allowable deviation
4.1.7Shearing and punching shall not be performed on carbon structural steel when the ambient temperature is lower than -20℃ and low alloy structural steel when the ambient temperature is lower than -15℃. 4.2 Correction and Forming
4.2.1 Carbon structural steel shall not be cold corrected or cold bent when the ambient temperature is below -16℃, and low alloy structural steel shall not be cold corrected or cold bent when the ambient temperature is below -12℃. 4.2.2 The minimum radius of curvature and maximum bending loss of cold corrected and cold bent shall comply with the provisions of Appendix A of this Code.
4.2.3 When heating and correcting carbon structural steel and low alloy structural steel, the heating temperature shall be selected according to the properties of the steel, but shall not exceed 900℃. Low alloy structural steel shall be cooled slowly after heating and correcting.
4.2.4 The surface of the steel after correction shall not have obvious concave surface or damage, and the scratch depth shall not exceed 0.5mm, and shall comply with the provisions of Article 3.0.3 of this Code. The allowable deviation of the steel after correction shall comply with the provisions of Table 4.2.4. 4.2.5 When parts are formed by hot working, the heating temperature should be controlled at 900-1000℃; the processing should be completed before the temperature of carbon structural steel drops to 700℃ and before the temperature of low alloy structural steel drops to 800℃; low alloy structural steel should be cooled slowly.
4.2.6 Parts formed by bending should be inspected with arc-shaped samples. When the chord length of the part is less than or equal to 1500mm, the chord length of the sample should not be less than 2/3 of the chord length of the part. The allowable deviation of the steel after correction (mm) is as follows: Local flatness of the steel plate Bending sagitta of the steel section Verticality of the angle steel limb Verticality of the channel steel flange to the web Verticality of the I-beam and H-beam wing to the web Allowable deviation tt/1000 The angle of the double-limb inspection angle steel shall not be greater than tt/1000
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