Technical indicators

1. Steel bracket material:

The bracket should be carbon steel profile or cold-formed thin-walled steel. The material and performance requirements are as follows:

(1) The main materials of the steel structure are Q235B, S250GD, Q355B, S350GD and other materials

(2) The tensile strength, elongation, yield point, cold bending test and other mechanical property requirements of the main materials of the steel structure must comply with the relevant regulations of "Carbon Structural Steel" (GB/T700-2007). According to the National Steel Standard implementation.

(3) The content of carbon, sulfur, phosphorus and other chemical elements in the main materials of the steel structure must comply with the relevant regulations of "Carbon Structural Steel" (GB/T700-2007).

(4) The size, shape, weight and allowable deviations of steel must comply with the "Dimensions, Shape, Weight and Allowable Deviations of Cold-Formed Hollow Sections for Structural Use" (GB/T6728-2002) and "Dimensions of General Cold-Formed Open Section Steels" , Appearance, Weight and Allowable Deviation" (GB/T 6723-2008) relevant regulations, it is strictly prohibited to use section steel that does not meet the relevant requirements. 1. The curvature of section steel should not be greater than 2 mm per meter, and the total curvature should not be greater than 0.2% of the total length.

2. Section steel, steel components and fasteners

It should meet the provisions of "Technical Requirements and Test Methods for Hot-Dip Galvanized Coatings of Metal Covered Steel Parts" GB/T13912-2002, and the manufacturer is required to provide a test report or anti-corrosion assessment report. Galvanized thickness detection: The thickness of the galvanized layer is tested according to the methods provided in "Metal Covering Layer - Technical Requirements and Experimental Methods for Hot-Dip Galvanized Coating of Steel Parts".

3. Mechanical performance requirements

The deformation of photovoltaic brackets and components meets the requirements of the "Photovoltaic Power Station Design Code" GB50797-2012 and other national specifications. The selection of bracket profile section and wall thickness requires calculation. The design of the fixed bracket structure is in accordance 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 stiffness requirements during transportation, installation and use, and meets the requirements for earthquake resistance, wind resistance and anti-corrosion.

4. Anti-corrosion requirements

(1) Steel components adopt the anti-corrosion method of metal protective layer. If the steel structure bracket adopts hot-dip galvanizing coating, the hot-dip galvanizing must meet the relevant requirements of "Technical Requirements and Experimental Methods for Hot-dip Galvanizing Coatings of Metal Covered Steel Parts" (GB/T13912-2002). Hot-dip galvanizing The thickness of the zinc layer meets national standards and customer requirements. If magnesium-aluminum-zinc plating is used, the average thickness of the magnesium-aluminum-zinc anti-corrosion coating meets national standards and customer requirements.

(2) Galvanized thickness detection: The thickness of the galvanized layer is tested according to the methods provided in the "Technical Requirements and Experimental Methods for Hot-Dip Galvanized Coatings of Metal Covered Steel Parts".