The entire process mainly consists of the following key steps.
Step One: Preparation before Installation
Adequate preparation is essential before starting.
Check the terrain and underground utilities. Survey the installation route, confirm ground conditions, and avoid underground pipelines.
Prepare materials and tools. Gather all components and tools, including mesh panels, posts, clamps or spider connectors, matching bolts or anti‑tamper bolts (e.g., M12x40mm), nuts, washers, a spirit level, etc.
Prepare the ground. Level and compact the ground along the installation route to ensure a solid foundation.
Set out the construction layout. According to the design drawings and actual terrain, mark the centreline of the posts and determine the exact positions for each post.
Step Two: Fixing the Posts (choose one method)
This is the key to the structural stability of the fence. Two main installation methods are available, each with its own emphasis.
Method 1: Bolt fixing using a base plate (suitable for concrete ground)
Advantages: Fast installation, not affected by weather.
Attention: Requires high ground flatness and strength.
Procedure:
Drill holes in the concrete ground and insert expansion bolts.
Align the posts with a base plate (bottom flange) over the bolts and secure them.
To enhance long‑term stability, subsequently cast a cement base of about 30x30cm around the base for reinforcement.
Method 2: Embedding the post in concrete (suitable for soil or gravel ground)
Advantages: Embedded underground, extremely stable connection, highest safety.
Attention: More complex construction, time‑consuming and labour‑intensive, requires waiting for concrete to set.
Procedure:
Dig pits according to the planned locations, typically about 30x30x30cm.
Place the post into the pit, ensuring it is vertical, at the correct height, and aligned with the other posts, then pour concrete.
Use temporary supports to hold the post until the concrete has fully set before proceeding with further installation.
Step Three: Installing and Connecting the Mesh Panels
After the posts are fixed, the mesh panels can be installed. There are two main ways to connect the mesh to the posts.
Bolted connection: Use anti‑tamper bolts to fix the mesh to the posts. This is the standard configuration for 358 fencing, effectively preventing unauthorised disassembly.
Clamp or spider connector connection: A modular connection solution that allows relatively flexible installation and removal. Anti‑tamper bolts are also used with this method to ensure security.
During the connection, special attention must be paid to the following points.
Ensure sufficient overlap. The edge of the mesh panel must overlap the post by at least 75mm. This is essential for structural strength.
Number of bolts and torque. Each connection point between a panel and a post must use an adequate number of bolts (for example, at least six M12x40mm anti‑tamper bolts per connection, three on each side of the post), and they must be tightened to the required torque to ensure firmness.
Ensure vertical mesh panels. Continuously calibrate with a spirit level during installation to ensure the mesh surface is perfectly vertical, avoiding the creation of climbing holds.
Control the ground clearance. The gap between the bottom of the mesh panel and the ground must not exceed 50mm, preventing people or animals from crawling underneath.
Adapt to terrain undulations. When the terrain is uneven, use longer posts and appropriately tension the mesh to ensure installation that follows the terrain changes.
Step Four: Adding Top Protection (optional)
In locations requiring higher security, top protection may be installed.
Y‑posts and barbed wire. Install Y‑shaped brackets on top of the posts, then add razor barbed wire or ordinary barbed wire to further discourage climbing.
Installing razor wire mesh. Tension and secure the razor wire, ensuring it is firmly fixed and closely connected to the top of the mesh panel.
Installing electronic monitoring. If an electronic fence or vibration sensor system is required, perform unified calibration and debugging after all installations are complete.
Construction Precautions and Core Specifications
To ensure the final result, several core construction specifications must be strictly followed.
Core structural parameters
Post spacing. Must strictly follow the design drawings (typically 2.5m or 3.05m). Excessive spacing will cause the mesh panels to sag, creating security weak points.
Post embedment depth. Typically 1/3 of the total post height. For example, for a 2.7m high post, the embedment depth should be at least 900mm.
Concrete grade. The concrete used to fix the posts must have a strength of not less than 25MPa.
Installation work points
Professional and tools. Installation must be carried out by experienced professionals using special tools to ensure quality and safety.
Clear line of sight and acceptance inspection. Before installation, ensure the installation route has a clear line of sight without obstructions. After completion, carefully check all connection points for firmness and make any necessary adjustments.
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