Writing 358 Mesh Specifications: What Makes a Good 358 Mesh Panel

When it comes to securing high risk sites such as prisons, utilities, airports, and sites with a requirement for secure, anti-climb and anti-cut fencing, few fencing solutions match the strength and reliability of 358 mesh panels. Known for their anti-climb and anti-cut properties, and robust construction, 358 mesh panels have become a gold standard in entry level high security fencing solutions. But not all 358 mesh panels are created equal. If you’re writing 358 mesh specifications, it’s essential to know what makes a panel effective and durable. In this article, we’ll break down the key features you should be looking for and explain why Jacksons Fencing’s Securi-Mesh® 358 mesh stands out.

What Is 358 Mesh Fencing?

The term ‘358’ comes from its precise measurements: 3 inches by 0.5 inches mesh spacing using 8-gauge wire (approximately 4mm). This tightly woven design creates an anti-climb and anti-cut fence, as the apertures are too narrow for fingers or cutting tools to gain leverage. The result is a fence that offers both physical strength and visual transparency, making it ideal for security-sensitive sites that require constant monitoring.

However, the quality of the materials and construction can vary significantly between manufacturers. That’s why detailed and accurate 358 mesh specifications are crucial when designing or specifying a security fencing system.

Key Features of High Quality 358 Mesh Panels

1. Secure Fixings and Construction Method

The strength of a 358 mesh panel relies not only on the mesh itself but also on how it is fixed to the posts. Premium systems like Securi-Mesh^® use clamp bar fixings combined with tamper-proof screws. This approach creates a secure and rigid connection that cannot be easily dismantled, unlike lower quality systems that may use simple clips or bolts vulnerable to tampering. Secure fixings prevent movement, sagging, or rattling over time. Systems like Securi-Mesh use carefully engineered methods to ensure the panels remain solid and secure over time.

2. Anti-Climb Design

The hallmark of 358 mesh fencing is its specific mesh pattern. With small apertures of just 76.2mm x 12.7mm, there are no finger holds available, preventing intruders from scaling the fence. This is why 358 mesh is commonly used in prisons and other high security applications. Be aware that the wire gauge is one of the most important aspects of this. A true 358 mesh system uses 4mm wire gauge (in its uncoated state). Many manufacturers state that their fencing has a 4mm wire gauge, however this is often after a powder or PVC coating has been applied. Our wire gauge measurements are always measured before coating, providing an accurate representation of strength. Thinner wires (albeit with a thicker coating) will be easier to bend to create wider gaps to enable a hand or foot hold.

3. Anti-Cut Resistance

A fence that is resistant to cutting is just as important as one that prevents climbing. A true 358 mesh system with its trademark small apertures and 4mm wire gauge offers exceptional resistance to bolt cutters and other hand tools. Thinner wires or lower-grade materials may compromise the security of the fence, making it easier for intruders to breach. Note that if you require certified protection against cutting, an LPS 1175 version should be specified.

4. Weld Quality

Not all 358 mesh panels are welded equally. Some manufacturers may use partial or spot welds, creating weak points where the mesh can fail under stress. Jacksons Fencing ensures that every intersection of its 358 mesh is fully welded, delivering maximum strength and longevity.

5. Protective Coatings

To withstand harsh weather conditions and reduce maintenance, a good 358 mesh panel should have a high quality finish. Jacksons Fencing offers premium architectural grade powder coating for an attractive, durable surface. Alternatively, if left uncoated, panels are treated with Galfan^® coating, providing exceptional corrosion resistance.

6. Engineered and Tested Posts

The posts are the unsung heroes of a fencing system. As fence height increases, so do the demands on the posts. We use an in-house drawing office and design team to calculate exact post sizes based on structural engineering principles. This ensures the entire fence is structurally sound and capable of withstanding real world conditions.

7. 25 Year Service Life Guarantee

A strong indicator of quality is the warranty offered by the manufacturer. Jacksons Securi-Mesh comes with a 25 year Service Life Guarantee, giving customers long-term peace of mind and value for money.

Why Choose 358 Mesh?

Aside from the key anti-climb and anti-cut characteristics of 358 mesh, it also provides other benefits including:

High Visibility for Monitoring

While strength is essential, visibility cannot be overlooked. 358 mesh fencing provides clear sightlines for CCTV systems and security personnel, ensuring there are no blind spots. This combination of physical security and surveillance compatibility is a major advantage over solid barriers.

Stops Objects Passing Through

The narrow mesh design also prevents the passing of objects, a vital feature for prison perimeters or sensitive facilities. It also helps prevent litter and leaves from blowing in and causing issues with machinery or creating an untidy appearance, and also stops animals entering into potentially dangerous areas and being harmed. The design makes 358 mesh fencing particularly suited to high risk environments where even small items must be controlled.

Why Jacksons Securi-Mesh Stands Out

When comparing 358 mesh fencing systems, it’s easy to focus solely on upfront costs. However, cutting corners on specification often leads to higher maintenance costs, premature failures, or even security breaches.

Jacksons Securi-Mesh^® is built around decades of experience in fencing design and manufacturing. From the true 4mm wire gauge and fully welded intersections to engineered post dimensions and tamper-proof fixings, every detail is carefully considered. Add to this the superior coatings and 25 year Service Life Guarantee, and you have a system that offers exceptional security and longevity.

By contrast, cheaper alternatives may use thinner wires, poor welding techniques, or inadequate coatings that compromise performance over time. The result is a fence that looks similar on paper but performs very differently in the field.

Writing 358 Mesh Specifications the Right Way

When writing specifications for a 358 mesh security fence, include detailed requirements for each of the features discussed above. For example:

Mesh aperture size: 76.2mm x 12.7mm

Wire gauge: 8 gauge (approx. 4mm uncoated)

Fixings: Clamp bar fixings with tamper-proof screws

Weld quality: Fully welded intersections

Finish: Premium powder coating or Galfan^® coating if uncoated

Posts: Engineered to meet structural requirements based on fence height

Guarantee: Minimum 25 years

By specifying these points clearly, you ensure that only high quality systems, such as Jacksons Securi-Mesh^®, meet the project requirements.

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