How To Choose Safety Fencing

In industrial and non-industrial environments, selecting the right mechanical safety mesh panels is crucial for ensuring personnel safety. According to GB/T 23821-2022, choosing the appropriate panel height and size requires comprehensive consideration of fence height, mesh size, and safety distance. Below is a detailed explanation based on the standard and accompanying images.

Selection of Mesh Size The mesh size is vital for preventing personnel from entering hazardous areas. Table 2 provides data on safety distances for reaching over protective structures at various heights. Based on Table 2 (Table 4 in GB/T 23821-2022), the relationship between opening size (e) and safety distance for individuals aged 14 and above can be determined. The opening size (e) refers to the side length of a square opening, the diameter of a circular opening, or the narrowest dimension of a slot opening. This data helps determine the mesh size to prevent access through the grid.

Consideration of Safety Distance Safety distance is the minimum distance between a person and a hazardous area. It should be sufficient to prevent accidental contact during machinery operation. Data from Image 2 assists in determining safety distances for different protective structure heights, while Table 2 provides safety distance requirements for various body parts. This information is critical for establishing appropriate safety distances.

Selection of Fence Height Fence height is a key factor in ensuring safety protection. According to GB/T 23821-2022, the height should be determined based on the height of the hazardous area (a) and the height of the protective structure (b). Image 1 illustrates the relationship between hazardous area height and protective structure height, as well as the horizontal distance (c) from the protective structure to the hazardous area. The fence height should prevent easy climbing to avoid entry into potentially dangerous zones.

Conclusion Selecting the appropriate mechanical safety mesh panel height and size is a critical safety consideration. By integrating fence height, mesh size, and safety distance, and typically deriving the required fence height (b) from the hazardous area height (a) and horizontal distance (c), one can ensure the fencing system meets safety requirements and suits specific working environments. For example, with a hazardous height of 1600 mm and a hazardous distance of 1500 mm, the required fence height is 1000 mm. This article aims to enhance understanding of selecting mesh panel heights and sizes in accordance with GB/T 23821-2022.