GB/T 38525-2020Anchor channel assemblies for building curtain walls (English PDF)

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.

7.3 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

7.3.1 respectively This n1 is tested, and the test results should meet the requirements of

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.

8.3 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.

9.2 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 C

30 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 Rm

1 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;

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.