4 Product classification, connection strength grade and model specifications
4.1.1 Classification by material
The main structural materials used in metal fences can be classified into steel (G) and aluminum (L).
4.1.2 Classification by structure
According to the metal fence main structure, it can be divided into welded type (H) and assembled type (Z).
4.1.3 Classification by purpose
According to the use of metal fences, it can be divided into isolation guardrail (G), safety guardrail (A), and landscape guardrail (J).
4.2 Connection strength level
For the assembled metal fence, due to the different connection modes of the main structure, it is divided into two types (J) and B (Y). The joint strength is the highest in class A (J) and the second level (Y) is adopted. The tapping screw (drilling screw) connects the main body of the fence and there is a risk of failure.
4.3 Surface treatment layer corrosion resistance grade
According to the different environment of the metal fence, it is divided into two grades (J) and Grade B (Y), which correspond to outdoor installation and indoor installation.
4.4 Model Specifications
Single piece height, m
Single piece length, m
Surface treatment layer corrosion resistance grade
Connection strength level
Material of the main material of the fence
Example: The main material of the fence is steel, the structure is assembled, used as a safety guardrail, the joint strength grade is Grade A, the coating is grade A, the length is 2.0m, and the height is 1.8m. , marked as: GZA-JJ 2.0×1.8.