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GB/T 38525-2020: Anchor channel assemblies for building curtain wall
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Anchor channel assemblies for building curtain wall
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GB/T 38525-2020
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Basic data | Standard ID | GB/T 38525-2020 (GB/T38525-2020) | | Description (Translated English) | Anchor channel assemblies for building curtain wall | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q73 | | Classification of International Standard | 91.060.10 | | Word Count Estimation | 30,386 | | Date of Issue | 2020-03-06 | | Date of Implementation | 2021-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38525-2020: Anchor channel assemblies for building curtain wall---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Anchor channel assemblies for building curtain wall
ICS 91.060.10
Q73
National Standards of People's Republic of China
Trough type embedded component for building curtain wall
2020-03-06 released
2021-02-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Classification and marking 3
5 General provisions 4
6 Requirements 5
7 Test method 8
8 Inspection rules 10
9 Product mark and product accompanying documents 12
10 Packaging, transportation and storage 13
Appendix A (informative appendix) Common structural types of trough embedded components 14
Appendix B (Normative Appendix) Test method for tensile bearing capacity of components and T-bolt pair 17
Appendix C (Normative Appendix) Anchorage bearing capacity test method 21
Trough type embedded component for building curtain wall
1 Scope
This standard specifies the terms and definitions, classification and marking, general regulations, requirements, test methods, and inspections of trough embedded components for building curtain walls.
Inspection rules, product markings and product accompanying documents, packaging, transportation and storage.
This standard applies to steel trough embedded components for building curtain walls.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 93 standard spring washer
GB/T 97.1 Flat Washer Class A
GB/T 197-2018 general thread tolerance
GB/T 228.1 Tensile Test of Metallic Materials Part 1.Room Temperature Test Method
GB/T 700 carbon structural steel
GB/T 1184-1996 shape and position tolerance without tolerance value
GB/T 1220 stainless steel rod
GB/T 1591 Low-alloy high-strength structural steel
GB/T 1804-2000 General Tolerance Tolerance of linear and angular dimensions without tolerance
GB/T 2100 General corrosion resistant steel castings
GB/T 2828.1-2012 Sampling inspection procedure by attributes Part 1.Batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 3077 Alloy structural steel
GB/T 3098.1 Mechanical properties of fasteners bolts, screws and studs
GB/T 3098.2 Mechanical properties of fasteners nuts
GB/T 3098.6 Mechanical properties of fasteners stainless steel bolts, screws and studs
GB/T 3098.15 Mechanical properties of fasteners stainless steel nuts
GB/T 4956 Magnetic method for measuring the thickness of non-magnetic coating on magnetic substrate
GB/T 5267.3 Fastener hot-dip galvanized layer
GB/T 6967 Medium and high-strength stainless steel castings for engineering structures
GB/T 7659 Steel castings for welded structures
GB/T 10125 Artificial atmosphere corrosion test salt spray test
GB/T 11352 Cast carbon steel parts for general engineering
GB/T 12362-2016 steel die forging tolerance and machining allowance
GB/T 13912 Technical requirements and test methods for hot-dip galvanizing of steel parts with metal covering
GB/T 14436 General Rules of Guarantee Documents for Industrial Products
GB/T 20878 Stainless steel and heat-resistant steel grades and chemical composition
GB/T 34327 Terminology for building curtain walls
Other anti-corrosion processes for galvanizing. When hot-dip galvanizing is used, the coating should meet the following requirements.
a) The appearance and thickness of the coating of the grooved embedded parts should meet the relevant regulations of GB/T 13912.The appearance and thickness of the coating of the T-bolt pair
The degree should meet the relevant regulations of GB/T 5267.3;
b) The corrosion resistance of the coating of the grooved embedded component should be subjected to a neutral salt spray test, and there should be no red rust within 480h of the coating of the grooved embedded component.
There should be no red rust in the secondary coating of T-bolt for 240h.
6.4 Installation torque
The installation torque T should meet the following requirements.
a) After 1.3T is applied, the trough-type embedded component should be able to be disassembled normally, and there should be no cracks, no visible deformation or damage;
b) The pre-tightening force F generated by the installation torque T is less than or equal to Fta/1.8, Fta is the standard value of the calibrated component tensile capacity.
Note. The installation torque T is calibrated by the supplier according to the product performance.
6.5 Mechanical properties
6.5.1 Elongation after fracture and shrinkage of area
6.5.1.1 The elongation and shrinkage of the channel of the channel embedded part after fracture
The steel channel of channel embedded parts shall be tested for elongation and reduction of area after fracture. The elongation of the channel embedded part steel channel after fracture shall not be less than
14%, the reduction of area should not be less than 30%.
6.5.1.2 The elongation and reduction of area of the anchor bar of the channel embedded part after fracture
The anchor bars of the grooved embedded parts shall be tested for elongation and reduction of area after fracture. The elongation of the anchor bar of the channel embedded part after breaking should not be less than
14%, the reduction of area should not be less than 30%.
6.5.1.3 T-bolt elongation and reduction of area after breaking
T-bolts shall be tested for elongation and reduction of area after breaking. The elongation of T-bolt after breaking should not be less than 14%, and the reduction of area
It should not be less than 30%.
6.5.2 Tensile bearing capacity of T-bolt pairs, tensile bearing capacity of components
6.5.2.1 Tensile bearing capacity of T-bolt pair
The T-bolt pair shall be subjected to a tensile strength test. The standard value of the tensile bearing capacity test of the T-bolt pair should not be less than the product calibrated T
Standard value of tensile bearing capacity of type bolt pair. The calculation of the test standard value shall comply with the provisions of Appendix B.
Note. The test standard value is the standard value obtained during the test of the product.
6.5.2.2 Tensile capacity of components
Trough-type embedded components should be subjected to component tensile bearing capacity test. The standard value of the component tensile strength test should not be less than the product calibrated component
Standard value of tensile capacity. The calculation of the test standard value shall comply with the provisions of Appendix B.
6.5.3 Anchorage capacity
6.5.3.1 Anchorage tensile capacity
The specimens were pre-embedded in plain concrete specimens with a compressive strength grade of C30 for anchoring tensile bearing capacity test. Anchor tensile capacity
The test standard value should not be less than the standard value of the anchor tensile bearing capacity calibrated by the product. The calculation of the test standard value shall comply with B.4.2 and
The provisions of Appendix C.
6.5.3.2 Anchorage vertical shear capacity
The specimens were pre-embedded in plain concrete specimens with a compressive strength grade of C30 for anchoring vertical shear capacity test. Anchor vertical
The standard value of the shear capacity test shall not be less than the standard value of the anchored vertical shear capacity calibrated by the product. The calculation of the test standard value should conform to the appendix
B.4.2 and Appendix C.
6.5.3.3 Anchorage parallel shear capacity
The specimens were pre-embedded in plain concrete specimens with a compressive strength grade of C30 for anchoring parallel shear bearing capacity tests. Anchoring parallel
The standard value of the shear capacity test shall not be less than the standard value of the anchored parallel shear capacity of the product calibration. The calculation of the test standard value should conform to the appendix
B.4.2 and Appendix C.
7 Test method
7.1 Appearance
Use visual inspection. A rubber hammer should be used to strike the anchor bar for mechanically engaging grooved embedded parts to check for looseness or fall off.
7.2 Dimensions and allowable deviation
The thread should be inspected with a thread gauge with the same tolerance level as the thread, and the length of the steel groove should be 1mm with an indication error
Grade II steel tape measure is used for inspection, and other sizes are measured with a measuring tool whose graduation value/resolution is not less than 0.02mm or 2'
test.
7.3 Coating
7.3.1 Appearance and thickness of the coating
The appearance of the coating is inspected visually, and the thickness of the coating is in accordance with the provisions of GB/T 4956.
7.3.2 Corrosion resistance of coating
The neutral salt spray test of the corrosion resistance of the coating should be carried out in accordance with the provisions of GB/T 10125.
7.4 Installation torque
7.4.1 There are 3 sets of test pieces in each group, and the length L of the steel channel of the test pieces is 150mm.
7.4.2 The test principle is shown in Figure 5.The test should be carried out according to the following steps.
a) Install the T-bolt at the position of the anchor bar in the steel channel of the test piece, and apply an initial torque of 0.5T in advance;
b) Load the torque to 1.3T at a rate not greater than 0.4T/s, and then remove the nut after maintaining the load for 1 min;
c) The effect of reloading to 0.5T.
8.2.3.2.2 Randomly draw samples according to the batch size and the corresponding number of samples specified in Table 4, and compare the samples according to the provisions of 7.2 and 7.3.1 respectively
This n1 is tested, and the test results should meet the requirements of 6.2 and 6.3 respectively. When the number of unqualified is not greater than the first judgment number Ac1, it is judged
This batch of products is qualified and accepted; when the number of unqualified products is not less than the first judgment number Re1, the batch of products is judged to be unqualified.
Refuse to accept. When the number of unqualified is between Ac1 and Re1, samples shall be drawn according to the number specified by n2 for the second inspection; two inspections
When the total number of unqualified samples in the inspection sample is not greater than the second judgment number Ac2, the item of the batch of products shall be judged as qualified; when the total number of unqualified products is not less than
When the second judgment number is Re2, the batch of products is judged to be unqualified.
8.2.3.3 Installation torque
The installation torque test should randomly sample 3 sets from the same inspection lot, and carry out the test in accordance with the provisions of 7.4, and the inspection results should meet 6.4
Provisions. When one set of samples is unqualified, a double number of samples should be taken for a second inspection. When all the samples for the second inspection are
When qualified, the batch of products shall be determined to be qualified.
8.2.3.4 The elongation and reduction of area after fracture of the channel embedded part, the elongation and reduction of area after fracture of the anchor bar of the channel embedded part, the T-shaped screw
Elongation and reduction of area after bolt break
Each test shall randomly sample 3 sets from the same inspection lot, and conduct the test in accordance with the provisions of 7.5.1, and the inspection results shall comply with 6.5.1
Provisions. When one set of samples is unqualified, a double number of samples should be taken for a second inspection. When all the samples for the second inspection are
When qualified, the batch of products shall be determined to be qualified.
8.2.3.5 Tensile bearing capacity of T-bolt pairs, tensile bearing capacity of components
For each test, 5 sets were randomly sampled from the same inspection lot, and the test was carried out in accordance with the provisions of 7.5.2, and the inspection results should meet 6.5.2
Provisions. When one set of samples is unqualified, a double number of samples should be taken for a second inspection. When all the samples for the second inspection are
When qualified, the batch of products shall be determined to be qualified.
8.2.3.6 Judgment rules
In the factory inspection items, if one item is unqualified, the batch of products will be determined as unqualified.
8.3 Type inspection
8.3.1 Inspection items
Type inspection items are full inspections.
8.3.2 Timing of inspection
Type inspection should be carried out when one of the following situations is encountered.
a) Type identification of new products or old products transferred to factories;
b) After the formal finalization, when there are major changes in material properties, processes, etc., which may affect product performance;
c) During normal production, type inspection is carried out every three years;
d) When production has been suspended for one year or more and production is resumed.
8.3.3 Batching rules
Take the factory inspection qualified batch as the inspection batch.
8.3.4 Sampling plan and determination rules
8.3.4.1 Appearance, coating appearance
Same as 8.2.3.1.
8.3.4.2 Dimensions and allowable deviations, coating thickness
Same as 8.2.3.2.
8.3.4.3 Corrosion resistance of coating
Randomly sample 3 sets from the same inspection lot and conduct the test in accordance with the provisions of 7.3.2.The inspection results shall meet the provisions of 6.3.When
When a set of samples is unqualified, the same number of samples shall be re-examined for the second inspection. When all the samples for the second inspection are qualified, it shall be determined
This batch of products is qualified for this project.
8.3.4.4 Installation torque
Same as 8.2.3.3.
8.3.4.5 Mechanical properties
8.3.4.5.1 The elongation and reduction of area after fracture of the channel embedded part, the elongation and reduction of area after fracture of the anchor bar of the channel embedded part, T type
Elongation and reduction of area after bolt break
Same as 8.2.3.4.
8.3.4.5.2 Tensile bearing capacity of T-bolt pairs, tensile bearing capacity of components
Same as 8.2.3.5.
8.3.4.5.3 Anchorage tensile capacity, anchorage vertical shear capacity, and anchorage parallel shear capacity
For each test, 5 sets were randomly sampled from the same inspection lot, and the tests were carried out according to the provisions of 7.5.3.The inspection results should meet the requirements of 6.5.3
Regulations. When one set of samples is unqualified, a double number of samples should be taken again for a second inspection.
When qualified, the batch of products shall be judged to be qualified.
8.3.4.6 Judgment rules
In the type inspection items, if one item is unqualified, the batch of products will be determined as unqualified.
9 Product logo and product accompanying documents
9.1 Product mark
The following signs should be marked on the obvious parts of the product.
a) The name or trademark of the manufacturer;
b) Model or mark.
9.2 Product qualification certificate
9.2.1 Each packaging box should have a product certificate. The preparation of the product certificate shall comply with the requirements of GB/T 14436.
9.2.2 The product certificate shall include the following contents.
a) Product standard number;
b) test results;
c) Product inspection date, factory date, inspector's signature and manufacturer's quality inspection seal.
9.3 Product Quality Assurance
9.3.1 Each delivery batch should have a product quality assurance certificate. The preparation of the product quality assurance certificate shall meet the requirements of GB/T 14436.
9.3.2 The product quality assurance certificate shall include the following contents.
a) Product standard number;
b) Product mark and trademark;
c) The scope of application and conditions of use of the product;
d) Product name, specification model, material (performance level), surface treatment process and installation torque T, with product drawings attached;
e) The standard value of the tensile bearing capacity of the T-bolt and the standard value of the component tensile bearing capacity of the product calibrated, the compressive strength of the concrete is C30
The standard value of anchoring tensile capacity, the standard value of anchoring vertical shear capacity, and the standard value of anchoring parallel shear capacity;
f) Product type inspection report. The product type inspection report should indicate the tensile capacity of the component when the nominal tensile strength of the steel is Rm1
Test standard value, the test standard value of anchoring tensile bearing capacity when concrete compressive strength is C30, and anchoring vertical shear bearing capacity
The standard value of the test, the standard value of the anchoring parallel shear bearing capacity test, and indicate that when used in actual projects, it must be based on the corresponding technology
Standard checking;
g) Manufacturer's name, address and contact telephone number of the department responsible for quality issues.
9.4 Product manual
The product specification should include the following.
a) Product standard number;
b) Product name, specification model, material (performance level) and surface treatment process, with product drawings attached;
c) The standard value of the tensile strength of the T-bolt and the standard value of the component's calibrated tensile strength of the product are C30
The standard value of anchoring tensile capacity, the standard value of anchoring vertical shear capacity, and the standard value of anchoring parallel shear capacity;
d) According to the specific working conditions and force requirements of the project, issue a trough embedded component anchoring capacity meter in accordance with the corresponding technical standards
Arithmetic
e) Product type inspection report;
f) Product installation instructions.
10 Packaging, transportation and storage
10.1 Packaging
10.1.1 Products should be packaged with non-corrosive packaging materials.
10.1.2 The obvious parts of the product packaging box should be marked with the following.
a) Product mark and trademark;
b) The name and address of the manufacturer;
c) Production date or batch number;
d) Inspection qualified mark;
e) Product standard number.
10.1.3 The packaging box should be firm, and the products in the packaging box should be isolated by light and soft materials to avoid damage to the product during transportation.
10.2 Transportation and storage
10.2.1 The product should be handled with care, impact and deformation, etc. during transportation, and should not be mixed with corrosive materials.
10.2.2 The product storage place should be clean, dry, ventilated and non-corrosive medium.
Appendix B
(Normative appendix)
Test method for tensile bearing capacity of components and T-bolt pair
B.1 Scope
This appendix specifies the test methods for the tensile capacity of components and the tensile capacity of T-bolts.
B.2 Test equipment and test devices
B.2.1 Test equipment includes testing machine, torque wrench and tape measure, etc. The testing machine should have data collection function.
B.2.2 The test device includes fixed fixtures, fasteners and other test auxiliary components, which should meet the following requirements.
a) The test device should not show visible deformation before the test piece fails;
b) In the component tensile bearing capacity test, the unilateral fit clearance i between the fixture and the anchor bar of the grooved embedded part shall not be less than the thickness or diameter of the anchor bar
Of 10%.
B.3 Test piece and installation
B.3.1 Test piece
B.3.1.1 5 sets of test pieces per group.
B.3.1.2 The length lc of the test piece for the tensile test of the component is 150mm.
B.3.2 Installation
B.3.2.1 The installation diagram of the tensile bearing capacity test of the T-bolt pair is shown in Figure B.1.
Where.
Fuc---Converted value of ultimate bearing capacity when the nominal tensile strength of steel is Rm1, in kilonews (kN);
Fut---the measured ultimate bearing capacity when the measured tensile strength of the steel failure part is Rm2, in kilonews (kN);
Rm1---the nominal tensile strength specified by the national standard of the corresponding material, in units of cattle per square millimeter (N/mm2);
Rm2---The measured average value of the tensile strength of steel in the same inspection lot, in units of cattle per square millimeter (N/mm2).
Note. Formula (B.3) is only applicable to the failure of the trough-type embedded component steel.
d) The test results of each group of test pieces shall be judged as qualified according to the above requirements and 6.5.2.
B.5 Test report
The test report should contain at least the following content.
a) Entrusting unit, testing unit.
b) The name, specification, model, material (performance level) of the product, and product drawings are attached. In the tensile test of the trough embedded component
Product drawings should indicate dimensions such as groove width bch, groove height hch, thickness t2, thickness t3, etc.; the T-bolt pair is produced in the tensile test
The product drawing should indicate the thread specification and length lb.
c) Sample delivery date and test date.
d) Test basis and test equipment.
e) Installation torque T and product standard value.
f) The ultimate bearing capacity at the time of failure of each test piece, the ultimate bearing capacity conversion value calculated according to formula (B.3) and according to formula (B.1),
(B.2) Calculated test standard value, and detailed circumstances at the time of failure.
g) Load-displacement curve diagram.
h) Photographs of test pieces before and after the test.
i) Signature of inspector and person in charge.
C.3 Test piece and installation
C.3.1 Test piece
C.3.1.1 5 sets of test pieces per group.
C.3.1.2 The production and maintenance of C30 plain concrete test block and the determination of the compressive strength fcu and t of the concrete cube shall comply with
The provisions of GB/T 50081.
C.3.1.3 The surface of the concrete test block should be flat, free of cracks, and the size should meet the requirements of Figure C.1, Figure C.2 and Figure C.3.
The size of concrete test block has specific requirements, and concrete test blocks can be made according to requirements.
C.3.1.4 Multiple channel embedded parts can be embedded in the concrete test block, but the distance from the channel embedded part to the edge of the concrete test block should conform to Figure C.1
As specified in C.2 and Figure C.3, the distance between adjacent trough embedded parts shall not be less than 4hef.
C.3.2 Installation
The test installation should meet the following requirements.
a) The installation of the anchoring tensile bearing capacity test, anchoring vertical shear bearing capacity test, and anchoring parallel shear bearing capacity test shall be as shown in the figure
As shown in Figure C.1, Figure C.2 and Figure C.3, the T-bolt pair for anchoring tensile bearing capacity test should be installed in the center between adjacent anchor bars
Position, the T-bolt pair for anchoring vertical shear capacity test and anchoring parallel shear capacity test should be installed in the steel channel.
The location of anchor bars;
b) Anchoring vertical shear capacity test and anchoring parallel shear capacity test When installing T-bolt pairs, apply a torque wrench to
Increase the torque to the installation torque T, the error should not exceed ±5%, after standing for 10 minutes, loosen the nut, and then reinstall the torque to
0.5T.
C.4 Test procedure and test result processing
C.4.1 The test should be carried out according to the following steps.
a) Pre-apply 10% of the initial load of the minimum tensile load of a single T-bolt;
b) Load at a uniform speed along the direction of load F shown in Figure C.1, Figure C.2 and Figure C.3 until the test piece fails, and the force acting on the T-bolt
The stress rate should not be greater than 10MPa/s;
c) Record the ultimate bearing capacity and failure mode of the specimen during the failure process, and draw a load-displacement curve.
C.4.2 The test result processing should be carried out according to the following steps.
a) Collect the test results of each group of test pieces. When component steel failure occurs, it should be converted into steel nominal tensile strength according to formula (B.3)
The converted value of ultimate bearing capacity when the strength is Rm...
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