Photovoltaic Brackets

Technical requirements

1. Steel support material:

The support should be made of carbon steel profile or cold-bent thin-walled steel. The material and performance requirements are as follows:
(1) The main material of the steel structure is Q235B, S250GD, Q355B, S350GD, etc.
(2) The tensile strength, elongation, yield point, cold bending test and other mechanical properties of the main steel structure must comply with the relevant provisions of “Carbon Structural Steel” (GB/T700-2007) and be implemented in accordance with national steel standards.
(3) The content of chemical elements such as carbon, sulfur, and phosphorus in the main steel structure must comply with the relevant provisions of “Carbon Structural Steel” (GB/T700-2007). (4) The dimensions, shape, weight and allowable deviation of steel materials must comply with the relevant provisions of “Dimensions, Shape, Weight and Allowable Deviation of Cold-bent Hollow Steel for Structures” (GB/T6728-2002) and “Dimensions, Shape, Weight and Allowable Deviation of General Cold-bent Open Steel” (GB/T 6723-2008). Steel that does not meet the relevant requirements is strictly prohibited. 1 The curvature of the steel should not exceed 2 mm per meter, and the total curvature should not exceed 0.2% of the total length.

2. Steel, steel components and fasteners

Should meet the requirements of “Technical Requirements and Test Methods for Hot-dip Galvanizing of Metal Covered Steel Parts” GB/T13912-2002, and the manufacturer must provide a test report or anti-corrosion evaluation report. Galvanizing thickness detection: The thickness of the galvanized layer shall be tested according to the method provided in “Technical Requirements and Test Methods for Hot-dip Galvanizing of Metal Covered Steel Parts”.

3. Mechanical performance requirements

The deformation of photovoltaic brackets and components shall meet the requirements of “Design Specifications for Photovoltaic Power Stations” GB50797-2012 and other national specifications. The selection of bracket profile cross-section and wall thickness must be calculated. The design of the fixed bracket structure shall comply with the current national building structure load specifications, steel structure design standards, and other specifications to ensure that the structure meets the strength, stability, and rigidity requirements during transportation, installation, and use and meets the requirements of earthquake resistance, wind resistance, and corrosion resistance.

4. Anti-corrosion requirements

(1) Steel components shall adopt the anti-corrosion method of the metal protective layer. Suppose the steel structure bracket adopts hot-dip galvanizing coating. In that case, the hot-dip galvanizing must meet the relevant requirements of “Technical Requirements and Test Methods for Hot-Dip Galvanizing Layer of Metal Covered Steel Parts” (GB/T13912-2002), and the thickness of the hot-dip galvanizing layer shall meet the national standards and customer requirements. If magnesium-aluminum-zinc plating is used, the average thickness of the magnesium-aluminum-zinc anti-corrosion coating shall meet national standards and customer requirements.
(2) Galvanizing thickness test: The thickness of the galvanizing layer shall be tested according to the method provided in “Technical Requirements and Test Methods for Hot-Dip Galvanizing Layer of Metal Covered Steel Parts.”

5. Manufacturing Process

Material Receiving → Loading → Uncoiling → Forming → Punching → Pickling → Water Rinsing → Immersion in Solution → Hot-Dip Galvanizing → Cooling → Passivation → Inspection → Packaging

6. Operating instructions

1. Storage: Profiles should be stored in a dry and ventilated warehouse to prevent rust and pollution. Profiles should be classified and stacked, with labels indicating the type, specification and batch number, and placed securely to prevent deformation and damage.

2. Loading: When lifting, components should be prevented from being damaged or deformed. They should be placed stably, in a moderate position, and reliably reinforced when loading. Danger warning signs should be hung for transportation of overlong, overwide, and overhigh pieces, and attention should be paid to protecting the safety of roads, bridges, communications, electricity and other facilities.

3. Transportation: Steel structure components should be properly tied during transportation and hoisting to prevent deformation, damage, and damage to the galvanized layer.