3.2.1

The steel used for the steel support shall be the profiles or steel pipes made of Q235 and Q345. The selection of materials and the design of the support shall comply with GB 5

provisions of the 0017.

3.2.2

The aluminum alloy bracket shall be made of aluminum profile of grade 6063, and its performance shall comply with the provisions of GB/T 6892.

3.2.3

The welding wire for gas shielded welding of steel supports shall comply with GB/T 8110.

3.2.4

The welding wire for gas shielded welding of aluminum alloy bracket shall comply with GB/T 10858.

3.2.5

Suitable fasteners shall be selected for bracket connection according to the design requirements, and their performance shall comply with GB/T 1231, GB/T 3098.1 and GB

/T 3098.6, GB/T 3632.

3.2.6

Other materials shall comply with relevant standards and quality certification documents shall be provided during procurement.

3.3 welding requirements

All welds of the welded parts shall be uniform, and there shall be no defects such as missed welding, false welding, crack, slag inclusion, burning through, crater, etc.

3.4 Appearance Requirements

3.4.1

The surface of the steel support shall be uniform and free of defects such as burrs, overburning, ash hanging, scars, etc., and there shall be no zinc nodules affecting the installation.

3.4.2

The surface of the aluminum alloy bracket shall be smooth, flat and free of scratches. There shall be no sharp edges, burrs, abnormal bulges and other defects.

3.5 surface treatment

3.5.1

The surface of the steel bracket shall be hot-dip galvanized, and the thickness of the protective layer shall be ≥ 65μm. Adhesion of protective layer shall be marked as per GB/T 5270

The test of line and drawing grid method shall not fall off.

3.5.2

The surface of aluminum alloy bracket shall be treated with anodic oxidation, and the thickness of oxide film shall be ≥ 10μm.

3.5.3

After the 48h salt spray resistance test (neutral NSS) of the surface protective layer of the hot-dip galvanized bracket, the bracket surface shall be free of red rust.

3.5.4

After 48h salt spray resistance test (neutral NSS) of the protective layer on the surface of the aluminum alloy anodized bracket, the surface of the bracket shall be free of corrosion.

3.6 dimensional accuracy

The size of the bracket shall meet the requirements of the design drawing, and the unnoted tolerance shall meet the requirements of Grade M in GB/T 1804.

3.7 structural strength

3.7.1

The structural strength of the bracket shall meet the requirements of basic load, basic wind pressure and basic snow pressure according to GB 50009.

3.7.2

After the bracket is installed as required, the 1100N/m 2 static pressure test shall be carried out for 24h. After the test, the support system shall not change obviously.

shape or failure.

4 Test method

4.1 General Inspection

3.3 and 3.4 shall be checked by visual hand feeling method.

4.2 protective layer test

4.2.1

The thickness of the hot-dip galvanized protective layer is measured by magnetic thickness gauge, and the thickness of the aluminum alloy anodized protective layer is measured by eddy current thickness gauge.

Amount.

4.2.2

The adhesion of hot-dip galvanized protective coating shall be tested by scribing and cross-cut method in GB/T 5270.

4.2.3

The salt spray resistance test shall be carried out in accordance with the relevant provisions of GB/T 10125. After the test, visually check whether there is corrosion.

4.3 dimensional accuracy inspection

General measuring tools meeting the accuracy requirements shall be adopted for measurement.

4.4 structural strength verification

4.4.1

The test shall be carried out in accordance with GB 50009.

4.4.2

Type test can be designed and manufactured with a certain representative structural test piece, the use of model test pieces for testing. Test

Ordinary mechanical booster or hydraulic device can be used, and other heavy objects can be used instead when conditions do not permit. with sufficient accuracy

And the range of the measurement system in the experiment to determine the relevant mechanical parameters, such as load, displacement, should be different. In the processing of test data

based on the analysis of the test results and conclusions.

5 Inspection rules

5.1 inspection classification

The inspection includes delivery inspection and type inspection.

5.2 delivery inspection

All products proposed for delivery shall be tested according to the specified factory inspection items. Each product is inspected by the manufacturer's quality inspection department.

The factory can only be delivered after passing the inspection, accompanied by a product certificate of conformity or with the conformity mark specified by the manufacturer.

5.3 type inspection

5.3.1

The type inspection shall be carried out under any of the following conditions:

a) Trial-produced new products;

B) Significant changes in design and process or materials;

c) Resume production after stopping production for more than one year;

d) The continuous batch products shall be inspected at least once a year.

5.3.2

Samples for type inspection shall be randomly selected from the packaged products after delivery inspection.

6 Marking, packaging, transportation and storage

6.1 identification

The appropriate number of marks shall be provided for the main parts of each batch. Its contents may include: trademark, model, specification, manufacturer name,

Product standard number.

 

6.2 packaging

The product packaging should be able to prevent mechanical damage during transportation, and should be selected appropriately according to the mode of transportation and the specifications and shapes of the components.

The packing method, such as angle steel or flat steel, wood board, foam concrete packing box, etc., should be convenient for hoisting and handling, or according to user requirements.

Packing list, product conformity certificate and factory inspection report shall be attached to the packing box.

6.3 transportation

The product shall not be mixed with volatile solvents and corrosive materials during transportation.

6.4 storage

The storage place of the bracket should be dry and covered, and should be protected from corrosive substances such as acid, salt and alkali.

It should be sorted and stacked, and the layers should be separated by appropriate soft cushions to avoid heavy pressure.