358 Security Fence Specifications and Applications Guide

358 security fence is a high-security welded wire fencing system designed to provide strong perimeter protection, difficult climbing access, and high visibility.

It is widely used around prisons, airports, military facilities, critical infrastructure, industrial sites, warehouses, utilities, commercial properties, and other high-security locations.

The name "358" comes from its traditional mesh opening specification:

3 inches × 0.5 inches × 8 gauge

This corresponds approximately to:

76.2 mm × 12.7 mm mesh opening with 4.0 mm wire diameter, depending on the actual manufacturing specification and wire gauge system used.

The distinctive narrow rectangular openings make 358 fencing very different from conventional chain link and standard welded wire fence.

This guide explains the structure, specifications, security features, applications, surface treatments, installation, and selection factors of 358 security fence.

What Is 358 Security Fence?

358 security fence is a rigid welded wire fence manufactured from horizontal and vertical steel wires welded together at every intersection.

The typical configuration is:

76.2 mm × 12.7 mm opening + approximately 4.0 mm wire

The openings are narrow enough to make it difficult for a person to:

Climb the fence

Put a foot through the mesh

Insert hands through the opening

Cut individual wires easily

At the same time, the relatively open mesh provides excellent visibility.

This combination of security + visibility + rigidity is one of the main reasons 358 fence is widely used for high-security applications.

Why Is It Called 358 Fence?

The term "358" refers to the traditional imperial dimensions:

3" = approximately 76.2 mm

0.5" = approximately 12.7 mm

8 gauge = traditionally associated with the wire specification

Therefore:

3" × 0.5" × 8 gauge = 358

In modern international specifications, manufacturers often describe the product as:

76.2 × 12.7 mm welded mesh

with approximately 4.0 mm wire diameter.

When purchasing, it is better to confirm the actual wire diameter and mesh opening rather than relying on the "358" name alone.

358 Security Fence Structure

A typical 358 security fence panel consists of:

Vertical wires

Horizontal wires

Welded intersections

Steel frame or posts

Fixing clips

Security fasteners

The narrow mesh opening creates a dense-looking but highly visible barrier.

Unlike chain link fence, the wires are welded together, producing a rigid panel rather than a flexible woven mesh.

Main 358 Security Fence Specifications

Mesh Opening

The traditional 358 mesh opening is:

76.2 mm × 12.7 mm

This rectangular opening is one of the defining characteristics of the system.

Some manufacturers may offer similar high-security mesh configurations with slightly different dimensions, so buyers should confirm the exact opening size.

Wire Diameter

A traditional 358 fence commonly uses approximately:

4.0 mm wire

Some manufacturers may offer variations according to project requirements.

Wire diameter has a direct effect on:

Panel weight

Rigidity

Cutting resistance

Cost

Overall fence performance

Fence Height

358 security fence can be manufactured in various heights.

Common project requirements may include approximately:

1.8 m

2.0 m

2.4 m

3.0 m

3.6 m

4.0 m

Higher customized systems

The appropriate height depends on the required security level and site conditions.

Panel Width

A common 358 fence panel width is around:

2.5 m

Other widths can be produced according to:

Site layout

Post spacing

Transportation requirements

Installation system

For large projects, panel dimensions should be coordinated with the post and fixing system.

Post Specifications

358 fence panels are generally installed using steel posts.

Common post types include:

Square posts

Rectangular posts

C-section posts

Specialized security fence posts

Post dimensions and wall thickness depend on:

Fence height

Wind load

Panel weight

Installation method

Project requirements

Surface Treatment

358 security fence can be supplied with different surface treatments.

Hot-Dip Galvanized

Hot-dip galvanizing provides a zinc coating that protects steel against corrosion.

It can be suitable for:

Outdoor industrial sites

Infrastructure

Agricultural facilities

General security applications

PVC or Powder Coating

The galvanized steel can also receive an additional polymer coating.

Common colors include:

Green

Black

Dark green

Grey

Green 358 fencing is especially common for outdoor sites because it blends relatively well with surrounding landscaping.

Powder coating can also provide a more attractive finished appearance.

Galvanized + Powder Coated 358 Fence

For demanding outdoor applications, a common specification is:

Steel → Galvanizing → Powder Coating

This combination provides both corrosion protection and a finished color surface.

However, buyers should confirm the coating process and relevant standards with the manufacturer.

Key Features of 358 Security Fence

1. Anti-Climb Design

The narrow 12.7 mm opening makes it extremely difficult to use the mesh as a conventional climbing ladder.

There is very little space for a person's foot or hand to obtain a secure grip.

2. Difficult to Cut

The dense mesh structure means that cutting through the fence requires cutting multiple closely spaced wires.

This makes unauthorized penetration more difficult than with many conventional wire fences.

However, no fence should be described as completely impossible to cut or breach.

3. Excellent Visibility

One of the biggest advantages of 358 fencing is that it provides security without completely blocking visibility.

Security personnel can maintain visual observation through the fence.

This makes it useful for:

Airports

Prisons

Industrial sites

Utilities

Warehouses

Critical infrastructure

4. High Rigidity

The welded structure creates a rigid panel.

Compared with flexible chain link fencing, 358 panels generally:

Hold their shape

Resist deformation

Provide a clean appearance

Require fewer intermediate structural adjustments

5. Difficult to Penetrate

The narrow openings limit the ability to insert tools or hands through the fence.

This contributes to its suitability for high-security environments.

6. Long-Term Outdoor Use

With an appropriate corrosion-protection system, 358 fence can be used outdoors for extended periods.

The actual service life depends on:

Coating quality

Environmental exposure

Coastal conditions

Industrial pollution

Installation

Maintenance

358 Security Fence Applications

1. Prisons and Correctional Facilities

358 fence is widely associated with correctional facilities.

It can be used for:

Perimeter fencing

Internal security zones

Prison boundaries

Restricted areas

The combination of anti-climb characteristics and visibility makes it suitable for high-security sites.

2. Airports

Airport perimeter security requires fencing that provides both physical protection and good visibility.

358 fencing can be used around:

Airport boundaries

Restricted operational areas

Equipment zones

Access-controlled areas

For airports, the complete perimeter security system may also include gates, intrusion detection, cameras, and other security equipment.

3. Military Facilities

Military sites may require high-security perimeter fencing around:

Bases

Storage areas

Restricted buildings

Equipment zones

358 fence can form part of a layered security system.

4. Critical Infrastructure

Applications can include:

Power stations

Water treatment plants

Telecommunications facilities

Utility sites

Energy infrastructure

These facilities often require controlled access and reliable perimeter protection.

5. Industrial Facilities

Factories and industrial sites may use 358 fencing around:

Production facilities

Warehouses

Chemical plants

Equipment areas

Restricted zones

Its visibility allows security staff to monitor the surrounding area.

6. Commercial Properties

High-value commercial sites may use 358 fencing to protect:

Distribution centers

Logistics facilities

Data centers

Storage compounds

Commercial warehouses

The rigid panel design also provides a professional appearance.

7. Railway and Transportation Infrastructure

358 fencing can be used around:

Railway facilities

Transportation depots

Maintenance yards

Restricted infrastructure

The exact design should account for local safety and infrastructure requirements.

8. Schools and Public Facilities

Higher-security versions of welded mesh fencing can also be considered for:

Schools

Government buildings

Public facilities

Restricted compounds

The appropriate fence height and design should match the site's security requirements.

358 Fence vs Chain Link Fence

This is one of the most important comparisons for buyers.

Feature

358 Security Fence

Chain Link Fence

Mesh structure    Welded    Woven    

Opening    Narrow rectangular    Diamond    

Rigidity    Very high    Moderate    

Anti-climb    Excellent    Moderate    

Visibility    Excellent    Excellent    

Cutting resistance    High    Lower    

Panel system    Common    Usually roll-based    

Installation cost    Higher    Lower    

High-security applications    Excellent    Limited    

General perimeter fencing    Excellent    Excellent    

For ordinary property boundaries, chain link may provide a more economical solution.

For high-security sites, 358 generally provides a substantially more rigid and difficult-to-climb barrier.

358 Fence vs Standard Welded Wire Fence

Feature

358 Security Fence

Standard Welded Fence

Mesh opening    Very narrow    Usually larger    

Wire diameter    Heavy    Light to heavy    

Anti-climb    Excellent    Depends on opening    

Rigidity    Very high    Varies    

Security    High    General to high    

Cost    Higher    Lower    

Typical use    High-security    General fencing    

Visibility    Excellent    Excellent    

The defining advantage of 358 is not simply that it is welded. It is the combination of narrow openings + strong wire + rigid panel construction.

How Is 358 Fence Installed?

A typical installation process includes:

Step 1: Site Preparation

Measure the perimeter and determine:

Fence line

Corners

Gates

Ground conditions

Changes in elevation

Step 2: Install Posts

Posts are fixed into:

Concrete foundations

Existing concrete

Specialized base plates

The foundation design depends on fence height, soil conditions, wind loading, and local engineering requirements.

Step 3: Position Panels

The 358 panels are placed between the posts.

Because the panels are rigid, accurate post spacing is important.

Step 4: Fix Panels to Posts

Panels can be attached using specialized:

Security clips

Bolts

Nuts

Anti-tamper fasteners

Security fasteners are particularly important for high-security projects.

Step 5: Install Gates

The system can incorporate:

Single gates

Double gates

Sliding gates

Vehicle gates

Pedestrian gates

Gate design should match the security level of the fence.

How to Choose the Right 358 Security Fence?

1. Determine the Required Security Level

First ask:

What are you protecting?

A warehouse storing ordinary goods may require a different system from:

A prison

Airport

Military facility

Data center

Power station

2. Select Fence Height

Higher fences can provide greater physical separation.

Common factors include:

Security requirements

Site layout

Local regulations

Budget

Ground conditions

For high-security projects, additional anti-climb or detection systems may also be considered.

3. Confirm Mesh Opening

For a genuine 358 specification, confirm:

76.2 × 12.7 mm

Do not assume that every product described as "high-security welded mesh" is actually 358 mesh.

4. Confirm Wire Diameter

A traditional specification is approximately:

4.0 mm

The actual diameter should be confirmed in the quotation and technical drawings.

5. Select the Surface Treatment

For outdoor applications, options may include:

Hot-dip galvanized

or

Galvanized + powder coated

The environment should determine the appropriate coating system.

6. Consider Posts and Accessories

A fence panel alone does not create a complete security system.

Also consider:

Posts

Clips

Security bolts

Gates

Base plates

Concrete foundations

Top protection

Intrusion detection

7. Consider Wind and Site Conditions

Tall security fences can be exposed to significant wind loads.

For taller installations, the design should consider:

Local wind speed

Fence height

Post spacing

Foundation depth

Soil conditions

Panel weight

Engineering requirements should be confirmed for the specific site.

Common Mistakes When Buying 358 Fence

Mistake 1: Buying Based Only on the Name

Some products may be marketed as "358 security fence" without providing the complete specifications.

Always confirm:

Opening + Wire Diameter + Panel Size + Coating

Mistake 2: Ignoring Post Strength

A strong panel cannot compensate for an inadequate post and foundation system.

The entire fence should be designed as one system.

Mistake 3: Comparing Price per Panel Only

A complete quotation should consider:

Panels

Posts

Fixings

Gates

Coating

Packaging

Freight

Installation

A lower panel price does not necessarily mean a lower project cost.

Mistake 4: Choosing the Wrong Coating

A coating suitable for an inland environment may not provide the same performance in a coastal or highly corrosive environment.

Mistake 5: Treating 358 Fence as a Complete Security System

358 mesh provides strong physical perimeter protection, but high-security sites may require additional systems such as:

Security gates

Cameras

Lighting

Access control

Intrusion detection

The fence is often one layer of a larger security strategy.

358 Security Fence Specification Checklist

Before requesting a quotation, provide:

Mesh

Opening: 76.2 × 12.7 mm

Wire diameter: approximately 4.0 mm

Panel

Height

Width

Number of panels

Post

Type

Size

Length

Thickness

Surface Treatment

Galvanized

Powder coated

Galvanized + powder coated

Accessories

Security clips

Anti-tamper bolts

Gates

Base plates

Project Information

Total perimeter length

Site location

Ground conditions

Required height

Application

This information allows suppliers to prepare a much more accurate quotation.

Frequently Asked Questions

Why is 358 fence called 358?

The name comes from the traditional specification of 3 inches × 0.5 inches × 8 gauge, corresponding approximately to 76.2 × 12.7 mm mesh with about 4.0 mm wire.

Is 358 fence difficult to climb?

Yes. Its narrow rectangular openings provide very little space for a person to place a foot or obtain a secure grip, making it substantially more difficult to climb than many conventional fences.

Is 358 fence stronger than chain link?

Generally, 358 fence provides a much more rigid welded structure. However, overall fence strength depends on the wire, panel construction, posts, fixing system, and foundations.

Can 358 fence be used outdoors?

Yes. It is widely used outdoors. Appropriate galvanizing and coating should be selected according to the environmental conditions.

Can 358 fence be customized?

Yes. Fence height, panel width, post dimensions, coating, gates, fixing systems, and other components can be customized for project requirements.

Is 358 fence suitable for airports?

It can be suitable for airport perimeter applications where its narrow openings, rigidity, and visibility are advantageous. Airport projects should follow the applicable local aviation security and engineering requirements.

Why Choose linkland fence 358 Security Fence?

linkland fence supplies 358 high-security welded fence systems for international contractors, fencing distributors, infrastructure projects, industrial facilities, airports, logistics sites, and other B2B applications.

Available configurations can include:

358 welded mesh panels

Security fence posts

Security fixing clips

Anti-tamper fasteners

Pedestrian gates

Vehicle gates

Galvanized finish

Powder-coated finish

Customized fence heights

A typical specification is:

76.2 × 12.7 mm opening + approximately 4.0 mm wire diameter

For project quotations, buyers can provide:

Fence Height + Panel Width + Mesh Opening + Wire Diameter + Coating + Total Length + Gate Requirements + Quantity + Destination

Conclusion

358 security fence is designed for applications where ordinary perimeter fencing is not enough.

Its key characteristics are:

Narrow Mesh Opening + Heavy Welded Wire + High Rigidity + Anti-Climb Design + Excellent Visibility

The traditional 358 specification is approximately:

76.2 × 12.7 mm mesh opening + 4.0 mm wire diameter

It is commonly used for:

Prisons + Airports + Military Facilities + Critical Infrastructure + Industrial Sites + Warehouses + High-Security Commercial Properties

When purchasing 358 fencing, look beyond the product name. Confirm the mesh opening, wire diameter, panel dimensions, coating, posts, fixing system, gates, and foundation requirements.

For a complete high-security perimeter, the fence should also be considered together with access control, surveillance, lighting, intrusion detection, and other security measures.

The right 358 fence system is therefore not simply the strongest panel available—it is the system that provides the appropriate level of security, durability, visibility, installation performance, and total project value.