At first glance, a 358 Security Fence and a standard welded mesh fence may look quite similar. Both are made from welded steel wires, both provide good visibility, and both can be galvanized or powder coated.
But take a closer look at the mesh openings, and the difference becomes clear.
A 358 Security Fence uses a much smaller mesh opening, typically 76.2 × 12.7 mm (3" × 0.5"), combined with horizontal and vertical steel wires. This makes it much harder to climb or cut through compared with conventional mesh fencing.
That's why 358 fencing is widely used around prisons, airports, power stations, industrial facilities and other restricted areas.
At Giant Fence, we manufacture welded mesh fencing systems for different security requirements. Let's look at what makes 358 fencing different and when it is worth choosing over standard mesh fencing.
What Is a 358 Security Fence?
The name 358 comes from its mesh dimensions:
3 inches (76.2 mm) horizontally
0.5 inches (12.7 mm) vertically
8 gauge steel wire (approximately 4.0 mm)
The small rectangular openings make it difficult to insert fingers or gain a foothold. They also make it harder to pass conventional cutting tools through the mesh.
Unlike ordinary welded mesh fencing, 358 panels are specifically designed to provide enhanced perimeter security while maintaining visibility.
358 Security Fence vs. Standard Mesh Fencing: What Is the Difference?
The biggest difference is not simply the appearance. It is how the two systems perform when someone tries to climb or cut through them.
|
Feature |
358 Security Fence |
Standard Mesh Fence |
|
Mesh opening |
76.2 × 12.7 mm |
Usually larger |
|
Main purpose |
High-security protection |
General boundary protection |
|
Climbing difficulty |
Much harder |
Depends on mesh design |
|
Cutting resistance |
More difficult |
Generally easier |
|
Visibility |
Good |
Good |
|
Typical applications |
Prisons, airports, utilities |
Schools, factories, residential areas |
|
Cost |
Generally higher |
Generally more economical |
Standard mesh fencing is a practical choice for many everyday applications. However, where unauthorized access is a serious concern, 358 fencing offers a more specialized solution.
Why Do More Security Projects Choose 358 Fencing?
1. Anti-Climb Design
The narrow 12.7 mm vertical opening leaves very little room for fingers or toes to gain a foothold.
This makes climbing considerably more difficult than with conventional welded mesh panels.
2. Better Resistance to Cutting
The close wire spacing also makes it difficult to position conventional cutting tools between the wires.
Combined with suitable wire diameter and strong welded intersections, 358 panels provide an effective physical barrier against common climbing and cutting attempts.
3. Good Visibility for Security Monitoring
Despite its dense mesh structure, 358 fencing still allows security personnel and surveillance cameras to monitor the area.
This is particularly useful around airports, prisons, industrial facilities and infrastructure sites where clear visibility is important.
4. A Rigid and Practical Structure
358 panels are manufactured as welded mesh sections and supported by suitable posts and fixing accessories.
When properly designed and installed, the system provides a rigid perimeter structure suitable for demanding security applications.
Where Is 358 Security Fence Commonly Used?
Prisons and Correctional Facilities: Helps prevent climbing and unauthorized access.
Airports: Suitable for restricted perimeter areas and airport facilities.
Power Stations and Utilities: Provides physical protection around critical infrastructure.
Industrial Parks and Warehouses: Helps secure valuable equipment and storage areas.
Commercial and Government Facilities: Suitable for locations requiring stronger perimeter protection.
For especially demanding projects, additional security features such as anti-climb toppings, intrusion detection systems and specialized gates may also be required.
What Specifications Should You Check Before Ordering?
Not all 358 fences are manufactured to exactly the same specification. Before comparing prices, pay attention to the following details:
Mesh Opening: Confirm the standard 76.2 × 12.7 mm opening.
Wire Diameter: A typical specification uses approximately 4.0 mm wire. Confirm whether the stated diameter refers to the steel wire before or after coating.
Panel Dimensions: Common panel heights and widths can be customized according to project drawings.
Posts and Fixings: Post dimensions, wall thickness, spacing and anti-tamper fixing systems should match the security requirements.
Surface Treatment: Confirm the zinc coating weight, powder coating requirements and inspection criteria.
What About Corrosion Protection?
A high-security fence is expected to remain outdoors for many years, so corrosion protection should not be overlooked.
At Giant Fence, our welded mesh fencing products are manufactured in accordance with UNE-EN-10223-7:2013, with production controls covering steel wire materials, coating weight and welding processes.
For coating selection, we also refer to ISO 9223:2012, which classifies atmospheric corrosivity from C1 to CX.
C1–C3: Low to medium corrosivity, common in many inland environments. Suitable galvanized or powder-coated systems can be considered.
C4–CX: High to extreme corrosivity, including demanding coastal and industrial environments. Higher zinc coating weights or more protective coating systems may be necessary.
How Long Can 358 Fence Last?
There is no single service life for every 358 Security Fence.
Under ideal conditions, with proper installation and no external damage, different coating systems can achieve their corresponding theoretical durability periods.
Actual performance depends on atmospheric exposure, coating quality, installation and maintenance.
ISO 9223:2012 helps identify the environmental corrosion risk, but it does not guarantee a fixed number of service years.
For coastal and industrial projects, it is always worth confirming the coating specification before production.
How Does Giant Fence Control 358 Fence Quality?
At Giant Fence, quality control starts with the steel wire and continues through welding, panel forming, surface treatment and final inspection.
Our production controls focus on:
Steel wire diameter and material consistency.
Mesh opening and panel dimensions.
Welding quality and panel structure.
Zinc coating and powder coating requirements.
Matching posts, clamps and fixing accessories.
For export projects, we also pay attention to protective packaging to reduce scratches and coating damage during transportation.
A complete 358 system should be checked as a whole, not just by looking at the mesh panel.
Is 358 Security Fence the Right Choice for Your Project?
If your main requirement is simply to mark a boundary, standard welded mesh fencing may be sufficient and more economical.
But if climbing resistance, cutting deterrence and perimeter security are major concerns, 358 Security Fence is worth considering.
At Giant Fence, we help customers compare different mesh specifications, panel structures and corrosion protection options to find a solution that matches their project.
Planning a high-security fencing project?
Share your required fence height, total length, project location and security requirements with Giant Fence. Our team can help you review the specifications and recommend a suitable 358 Security Fence system.
The right security fence should do more than look strong. It should make unauthorized access considerably more difficult.
Frequently Asked Questions About 358 Security Fence
Q1: What does 358 mean in security fencing?
A1: It refers to a mesh opening of 76.2 × 12.7 mm and 8-gauge wire, approximately 4.0 mm in diameter.
Q2: Is 358 fencing better than standard welded mesh?
A2: For high-security applications, yes. Its smaller mesh openings make climbing and cutting more difficult. Standard mesh remains a practical option for general boundaries.
Q3: Can 358 Security Fence be powder coated?
A3: Yes. Galvanized and galvanized-plus-powder-coated options can be selected according to the project environment.
Q4: Where is 358 fencing commonly installed?
A4: Prisons, airports, power stations, industrial facilities, warehouses and other restricted-access areas.
Q5: Can Giant Fence customize 358 panel dimensions?
A5: Yes. Panel height, width, post specifications, fixing accessories and coating options can be customized according to project requirements.
Q6: Which standards are relevant to 358 fencing?
A6: UNE-EN-10223-7:2013 provides manufacturing requirements for welded steel wire mesh fencing. ISO 9223:2012 helps assess atmospheric corrosivity and select appropriate corrosion protection systems.