Looking for the ultimate in perimeter security? For facilities where a break-in is simply not an option, 358 "anti-climb" fencing is the top choice worldwide. It offers a unique combination of tough security, clear views for monitoring, and long-lasting strength. This guide answers all your key questions, helping you choose the right system for maximum protection.
In This Guide:
What is 358 Fence?
The name "358" isn't a model number. It comes directly from the fence's measurements: the mesh openings are 3 inches by 0.5 inches, and the wire is 8 gauge thick. This design creates a very tight mesh, making it almost impossible to climb. While it's sometimes called "prison mesh," it's a modern system made up of three simple but very strong parts:
Panels: The welded mesh panels that create the anti-climb barrier.
Posts: Strong steel posts that are secured in the ground to support the fence.
Connectors: Special tamper-proof bolts and brackets that attach the panels to the posts.
The Key Advantages of 358 Fence
Choosing a 358 fence gives you a combination of benefits that other security fences just can't offer:
Stops Climbing: The mesh openings are too small for fingers or feet to get a grip, making the fence almost impossible to climb. It's also very difficult to cut with common tools.
Built to Last: Made from thick, heavy-gauge steel and protected by advanced coatings (like galvanization and powder coating), these fences are designed to stand up to harsh weather and physical force for decades.
Excellent Visibility for Security: Unlike a solid wall, the mesh design gives your security team a clear, unblocked view of the entire area. This prevents intruders from using the fence as a hiding spot.
Very Little Maintenance: The strong, factory-applied finish means you won't have to worry about constant upkeep. A quick check-up once in a while is all that's needed to make sure it's in great condition.
Where is 358 Fencing Used?
Different locations need different levels of security. 358 fencing is the choice for places where security is the number one priority.
Critical Infrastructure
Ideal For: Power stations, data centers, and water treatment plants.
Why it Works: It acts as a powerful physical barrier, protecting these vital services from break-ins and attacks. Fences are often 2.4m (8 feet) tall or higher.
Transportation Hubs
Ideal For: Airports, rail yards, and ports.
Why it Works: It's perfect for securing large areas while still allowing clear views for security monitoring. This is crucial for stopping people from getting into restricted zones.
Correctional & Government Facilities
Ideal For: Prisons, police stations, and secure government buildings.
Why it Works: As the original "prison mesh," it provides the highest level of security to keep people contained. It is designed to meet the tough security requirements for these types of facilities.
How to Choose the Right 358 System
Follow these steps to select the perfect high-security fence for your needs.
Step 1: Assess Your Security Needs
First, determine the fence's main purpose. Is it to deter casual intruders or to stop a determined attack? This will guide your decisions on height and other security features.
Step 2: Select Fence Height and Specifications
Height is a key deterrent. Taller fences (2.4m / 8 ft or more) offer greater security. You can refer to the typical specifications and customization options below to help you decide.
Specification | Standard Options | Customize Available |
Panel Height | 2.0m, 2.4m, 3.0m | Up to 6.0m |
Panel Width | 2.2m, 2.5m, 3.0m | Project specific |
Wire Diameter | 4.0mm (8 gauge) | 3.0-5.0mm |
Mesh Opening | 76.2 × 12.7mm | Fixed standard |
Post Centers | 2.5m - 3.0m | Engineering design |
Step 3: Understand the Protective Coating
A fence's lifespan depends on its coating. The best systems use a two-layer approach for maximum durability:
Galvanization: A zinc coating that provides superior rust protection.
Powder Coating: A thick, durable finish for long-lasting color and protection against chipping and fading.
Step 4: Consider Gates and Enhancements
A fence system is only as strong as its weakest point. Be sure to plan for matching high-security gates (swing or slide). You can also consider enhancements like razor wire topping, anti-dig foundations, or integration with electronic alarm systems for a complete security solution.
Note: Choosing a security system is a significant decision. If your project has complex requirements or if you're unsure about the best specifications, we recommend consulting a specialist. Our team is available to review your project details and help you find the right solution.
Certified for Quality: Meeting Global Standards
You don't have to just take our word for its strength. To be used in high-risk environments like correctional facilities and for critical infrastructure, 358 fencing must be tested and certified against strict international standards.
Key compliance standards to look for include:
BS 1722-14: British standard for security fencing and gates
EN 10223: European conformity marking for steel wire and wire products
EN 10245: European standard for coated steel wire product
ISO 9001: Certifies that the manufacturer follows a strict quality management system.
Maintenance Tips
Check Fixings: Once a year, check the nuts and bolts. If any are loose, tighten them to keep the fence strong.
Clear Plants & Trash: Cut back any plants that someone could use to climb or hide. Clear away leaves at the bottom of the fence to stop rust.
Check Post Strength: Make sure every post is solid and straight. A loose post is a big security risk, so check them after big storms.
Care for Gates: Gates get used the most, so check their hinges and locks. A little oil or grease will keep them working smoothly.
Wash it Down: If you're near the ocean or a factory, hose the fence down with fresh water once in a while. This cleans off dirt that can cause damage.
Frequently Asked Questions
Can it really stop someone from climbing?
Yes, it’s very difficult to climb. The mesh openings are too narrow for fingers and toes to get a solid grip, which stops most climbers.
How long does a 358 fence last?
With a professional installation and a quality finish (galvanized and powder-coated), a 358 fence can last for decades. It needs very little maintenance, making it a smart choice for the long term.
Can the fence be installed on a slope?
Absolutely. The panels are installed in a “stair-step” style to perfectly follow sloped or uneven land. This method ensures there are no security gaps at the bottom of the fence.
Is it more expensive than other security fences?
The initial purchase price is higher than for a basic fence like chain-link. However, because it's much stronger, lasts far longer, and requires almost no maintenance, it often ends up being the cheaper option over its lifetime.
