Anti Climb 358 Mesh Perimeter Security Fence 2400mm High,358 Security Prison Mesh Fencing Project 2700mm High
358 mesh fence is a protective mesh sheet with a wire diameter of 4.0 mm and mesh openings of 76.2 mm x 12.7 mm. Due to the small size of the mesh openings, the fence appears densely packed, which is why it is also known as "dense mesh." The 358 mesh fence is highly secure because of its strength, small mesh size, and anti-climbing design. It is widely used in high-security areas such as airports, prisons, military facilities, and other places where protection is essential to block intruders and prevent climbing.
Term "358"
The term "358" in high-security 358 mesh fencing has a specific meaning that refers to the mesh size and wire diameter specifications of the fence. Specifically:
- ‘3’ refers to the 3-inch (or 76.2 mm) long hole size. This is the larger hole size portion of the mesh and forms the basic structural framework of the fence.
- ‘5’ refers to the smaller hole size of 0.5 inches (or 12.7 mm). This smaller aperture portion intersects with the longer holes, adding to the density and strength of the mesh.
- ‘8’ refers to the No. 8 wire diameter, which is 4.0 mm. This specification determines the thickness of the wire used in the mesh and contributes to its sturdiness and resistance to vandalism.
Common heights for anti-climb 358 mesh perimeter security fencing range from 1.8 meters to over 5 meters, catering to varying security needs:
- 1.8 meters: Suitable for basic perimeter protection in low-security areas.
- 2 meters: A standard height for general security applications.
- 2.4 meters: Provides enhanced security compared to lower heights.
- 2.7-3 meters: Offer increased protection, effectively deterring climbing.
- 4-6 meters: Employed in high-security environments such as prisons and military installations.
Advantages
- Exceptional Resistance to Intrusion: The small aperture, measuring 72.2mm horizontally and 8.7mm vertically, makes 358 security fencing extremely difficult to penetrate using conventional hand tools. This design significantly increases the delay time for any attempted breach, making it a highly effective deterrent.
- Discreet Visual Profile: Despite its high level of security, 358 fencing maintains a relatively unobtrusive visual impact on the surrounding environment. Its open design allows for excellent visibility, which is crucial for effective camera surveillance and rapid identification of potential intruders.
- Compatibility with Security Systems: 358 security fencing is designed to integrate seamlessly with various electronic alarm and detection systems, providing a comprehensive security solution.
- High Weld Strength: The weld strength of this security fencing is guaranteed to be a minimum of 75% of the steel's tensile strength, ensuring the structural integrity and durability of the fence.
Technical Details
- Inner Aperture: 72.2mm x 8.7mm
- Wire Diameter: 4mm
- Panel Width: Up to 2.8m
- Panel Height: Up to 6m
- Wire Tensile Strength: 600-750 N/mm²
- Welded Joint Strength: 75% (minimum) of steel strength
Surface Treatment Options
- Galvanization: Zinc Class A (minimum 275g/m²) or Class C (minimum 110g/m²) coating. Heavy galvanised wire Class A (min. 275g/m²) or Lightly Galvanised wire Class B (min. 135g/m²).
- PVC Coating: An optional PVC coating can be applied over the galvanized finish for enhanced durability and aesthetics.
High-Security Perimeter Solution for African Customer
This project involved the supply, manufacture, delivery, installation, and commissioning of a comprehensive high-security perimeter system for a customer in Africa. The system combines robust 358 mesh fencing with a multi-zone electric fence, providing a formidable barrier against intrusion. The total fence length was 3700 meters, with a height of 2.4 meters for the 358 mesh and 3.4 meters for the integrated electric fence.
The 358 mesh fence was constructed using galvanized steel and finished with a durable RAL 6005 green PVC powder coating for enhanced corrosion resistance and aesthetics. The supporting posts consisted of 1600 x 80 x 60 x 4mm RHS (Rectangular Hollow Section) main posts and 50 x 80 x 60 x 4mm RHS posts, both equipped with 250 x 250 x 10mm base plates featuring M20 mounting holes for secure anchoring. Access was provided by 6 x 6 meter double swing gates, automated with heavy-duty mounting posts and robust 380Vac swing motors.
The integrated electric fence system, also finished in RAL 6005 green PVC powder coating (including the posts), was designed as a multi-zone system for enhanced security and monitoring capabilities. The insulators for the electric fence were specified in military green for improved camouflage and integration with the environment.
In addition to the main fence structure, the project included the supply of 300mm "Y" standard posts with four 10mm diameter holes spaced at 100mm centers. These "Y" posts were used to support 20,000 meters of 8mm diameter steel rope, further reinforcing the perimeter and providing additional layers of security along a 3700 meter length and 1600x1300 meter area, it's important to clarify if this means the area enclosed by the fence or the dimensions of a secondary fenced off area.
Technical Specifications
- System Type: Combined 358 mesh and multi-zone electric fence.
- 358 Mesh Fence: 2.4m high x 3700m long, galvanized steel with RAL 6005 green PVC coating.
- Electric Fence: 3.4m high, multi-zone system, RAL 6005 green PVC coated posts, military green insulators.
- Posts: 1600 x 80 x 60 x 4mm and 50 x 80 x 60 x 4mm RHS with 250 x 250 x 10mm base plates and M20 mounting holes.
Gates: 6 x 6m double swing gates with 380Vac swing motors. - Additional Components: 300mm "Y" standard posts with 4x10mm holes (100mm centers), 20,000m of 8mm steel rope.
- Installation: Supply, manufacture, delivery, installation, and commissioning included.
2.4m high 358 mesh Anti-cut Anti-climb Fence
| Particulars | requirements |
| Fence length |
3700m |
| Fence height m | 2400mm |
| Panel size (Height x Width) | 2400mm x 2515mm |
| Fence Post (Height x Size x Thick ) | 3100mm x 60 x 60 x 4mm |
| Clamp Bar (Height x Width x Thick ) | 2400 x 60mm x 5mm |
358 mesh panel size |
|
| Mesh pattern: | 76.2mm (3") x 12.7mm (0.5") resistance welded well at each intersection |
| Wire diameter | 4mm horizontal wire and 6mm vertical Wire |
| Weld strength | range 540-690 N/m2 |
| Surface treatment | 358 mesh fence panels made from galfan wire (or better material), then PVC powder coating (Min. 100 micron). or PVC powder painting. It provides additional protection and increases the potential life span. |
| Colours | Green 6005 |
| Installation | Overlapped 75mm minimum at each post as the following pictures below) for securing with slotted clamp bars and M8 diameter bolts. |
Fence posts |
|
| Material | High grade steel for maximum strength and rigidity. |
| Post Plate thickness | 4.0mm |
| Finish | Inside and outside hot dipped galvanized (Min. 275 g/m2), subsequently covered with a polymer powder (Min. 60 micron). |
| Post cap | metal caps |
| Clips and clamps | Metal clips and clamps are hot dip galvanised then powder coating in green or black colour. |
Fence Gate |
|
| Number of Gates | 6 |
| Type of gate | Automated Heavy Duty Swing Gate |
| Height | 2400mm |
| Width | 6 metres |
Electric Fence (bolted to the 358 anti-climb fence)
The electric fence is as tabulated below.
| Particulars | requirements |
| Electric Fence length |
3700m |
| Electric Fence height | 3400 mm |
| Energizer | Specification of the energizer will be in accordance with IEC 60335-2-76 the International Standard. Peak value of input voltage must be above 7.5kV, but not exceeding 10kV |
| Trip Wire Fence | Normal trip wire use a Y -standard steel pole of 600mm. When the post is planted, the height above ground level should be 280-300mm. Distance from 358 mesh fence: 600mm, where a short offset bracket can be used on the same side as the trip wire. |
| Gates | 8 x 6m gates fitted |
| Fence wire | Positive wires should be "hot, double dipped" 2.4 mm nominal diameter whilst negatives should be normal high tensile 2.25mm nominal diameter. |
| High Tension (HT) Insulated Cables | - Insulation of HT cables should be UV stabilized for outdoor installation. - The HT cables must be run through a 32mm conduit for added protection and facilitate future repairs. |
| Crimp Ferrules / Split Bolts | The fence wire and the High Voltage cable should be connected with suitable aluminium crimp ferrules. These components shall have the same material composition as the fence wire and the High Voltage cable |
| Tensioning Devices | •A non-metallic tensioning device should be used to tension the electric fence wires. •The tensioning devices should be able to withstand at least five times the maximum installed wire tension. •The tensioning device should allow for the accurate tensioning of the fence wires to the required tension. It should only be possible to tension the fence wires by means of a special made tool which should indicate the correct wire tension |
| Strain posts | • All strain posts should be manufactured from 50mm x 50mm square tubing. • Strain posts should be fully galvanized/powder coated. All holes should be pre-drilled before galvanizing/coating. |
| Intermediate posts | • All intermediate posts will be manufactured from 25mm x 25mm square tubing • Intermediate posts should be fully galvanized/powder coated. All holes should be pre-drilled before galvanizing/coating |
| Lightning Protection Specifications | • The electric fence should be fitted with the appropriate lightning protection system in accordance with SANS 62305 Protection against lightning. • Protection should be provided on both the high voltage output as well as the 230VAC input. • A common earth point at the enclosure for both the high voltage and 2.30VAC input lightning protection systems |
| Lightning Diverters | Adequate Lightning diverters shall be installed to prevent damage of the system by lightning |
| Electric Fence flashers | Flashes with every fence pulse Visible for up to 100m at night and 20m by day high brightness LED's for long life and extra brightness Continuous monitoring Designed to be connected between live and earth fence wires Stainless steel connecting wires May reduce fence voltage by up to 0.3 kV Sealed weatherproof unit no maintenance or batteries required Canbe placed anywhere on the fence Blue in Colour |
| Earthine | Earth pegs must be used at the beginning or end of each zone. at a maximum distance of 50m apart. Earth pegs must be connected to the main earth rod, the fence posts and earth conductors of the fence. Three (3) earth pegs, 1.8m apart in a triangle layout, must be installed at both sides of the Access Control Building (ACB). The pegs must be connected to the main earth rod and the first post on each side of the fence. |
| Standards | BS 1722:17, BS EN ISO 60335-2-76 |
Electric Fence System Specifications
Post Specifications
- Strain and intermediate posts: Minimum 2mm thick steel, fully galvanized to BS EN ISO 1461, pre-drilled at 91mm centers, with mounting holes for attachment to the host fence. All holes and cuts are performed before galvanization. Wire conforms to BS 1722:17.
Insulators
- Strain insulators (end/corner posts): High-quality industrial virgin nylon, 15KV rated, UV stabilized, designed to trap the wire upon breakage, prevent wire removal under tension, and feature a secure, tamper-resistant locking pin. Military green, high-density polymer, UV stabilized, and withstand tensions exceeding 601kg, providing adequate insulation.
- Reel insulators: Virgin polypropylene, 15KV rated, UV stabilized.
Tensioning
- Tensioning strainers: High-density polymer, military green, UV stabilized, with a wheel featuring at least 30 incremental positions for fine tensioning, adjustable with a ratchet tensioner.
- Pull-through wheels (internal corners): High-density polymer, military green, UV stabilized, allowing retrospective installation and even tensioning at any horizontal angle.
High Voltage Gate Switch (HVGS)
Durable, reinforced plastic suitable for 358 mesh fencing and heavy gates, designed to:
Accommodate zone feed and return.
Incorporate an earth connection.
Create a dead short across the zone when the gate is open.
Cabling and Signage
- Lead-out cable: 2.7mm steel wire, resistance no more than 11 ohms/km, double-insulated for 15kv isolation, suitable for pulling through ducts.
- Warning signs: Manufactured and displayed per BS EN ISO 60335-2-76 and BS 1722:17.
General Construction
- Minimum 38 high-tensile wires strung between strain points at maximum 91mm vertical intervals, from ground level up to at least 1000mm above the host fence (total electric fence height: 3.4m).
- Bottom wire no further than 125mm from the ground.
- All wires (live and earth) at least 30mm from any steelwork.
- Warning signs attached to the host fence.
- Double-leaf and emergency egress gates zoned independently and fitted with HVGS (specific details provided at site visit).
Strain points externally protected with anti-climb devices (minimum 6 wires). - Intermediate posts fitted with "weak-claw" insulators.
- Fence controllers directly feed zones via ducting to the start strain point, housed in a building or IP68 rated external cabinet (exact location determined at site visit).
- Existing host fence strain points replaced with suitable SHS posts (prefabricated with the physical post and hot-dipped galvanized where possible).
- Each linear zone may be split into upper and lower vertical channels.
- Fence controllers housed in a secure container within the listed buildings compound.
- Electric fence designed as a clear view fence.
Control and Operation
- Central station control and monitoring.
- Provision for connection to CCTV system.
- Programmable fence outputs for individual zone monitoring and alarm identification.
- High Voltage Zone Separation to prevent cascading failures.
- Selectable Zone Control for partial arming.
- Smart Battery Backup providing 8 hours of high-voltage operation during power outages, with battery condition monitoring.
Green PVC Coated Steel Weld Mesh High Security Fencing Panels
358 Mesh, Hot Dipped Galvanised and Vinyl Powder coated in black
358 Mesh High-Security Perimeter Solution for Airport Protection
358 mesh fencing solution for airport protection provides a highly secure perimeter that effectively prevents unauthorized access, intrusion, and climbing. The combination of barbed wire, razor wire, welded mesh, and reinforced concrete posts creates a formidable barrie. The solution integrates several layers of defense, including reinforced concrete posts, barbed wire, razor wire, and the central 358 mesh fabric, adhering to the latest British Standards for security fencing.
Key Specifications
- Posts: Reinforced concrete, pre-drilled with double cranked extension arms (BS 1722 Part 10).
- Barbed Wire: 3mm hot-dipped galvanized, three strands.
- Razor Wire: 600mm diameter coiled razor wire.
- Mesh: 358 mesh with 76.2mm x 12.7mm apertures, 3mm steel wire, zinc-coated with a plastic sheath, installed at 2.7 meters total height (2.4 meters above ground and 0.3 meters buried).
- Gates: Double swing gates, 2.1m high x 6m wide, welded steel frame with high-quality ironmongery.
System Design and Specifications
The airport perimeter security system is designed to meet the highest standards of protection, incorporating multiple layers of deterrence and physical barriers:
1. Reinforced Concrete Posts: The foundation of the fence consists of reinforced concrete posts, offering structural strength and stability. These posts are pre-drilled to support various security elements:
- Framework: Three lines of 3mm hot-dipped galvanized high-tensile steel wire form the structural framework for attaching the welded mesh, complying with BS 1722.
- Barbed Wire: Three lines of 3mm galvanized barbed wire are spaced evenly along the posts. This enhances the fence's deterrent against climbing and cutting.
- Razor Wire: Anchor points for coiled razor wire are positioned above the barbed wire to further reinforce the barrier. The razor wire acts as a significant deterrent, making it nearly impossible to climb without specialized tools.
- Extension Arms: Double cranked extension arms, as specified in BS 1722 Part 10, extend outward to support the barbed and razor wire, further hindering climbing attempts and ensuring the perimeter’s integrity.
2. Perimeter Wire Enhancements:
- Barbed Wire: The three strands of 3mm galvanized barbed wire create a strong physical and psychological deterrent. The galvanization ensures long-term durability and resistance to corrosion.
- Razor Wire: 600mm diameter coiled razor wire is fixed above the barbed wire to create an additional layer of protection. This makes climbing the fence highly difficult, if not impossible, without cutting tools.
3. 358 Welded Mesh Fabric: The central component of the security system is the 358 welded mesh fabric, known for its anti-climb and anti-cut properties.
- Height: The mesh is installed at a height of 2.4 meters above ground, with an additional 0.3 meters buried underground for a total installed height of 2.7 meters. The buried section prevents tunneling or undermining.
- Material: The mesh consists of 3mm diameter steel wire, coated with zinc for corrosion resistance. Additionally, the wire is covered by a plastic sheath to provide further protection against weather and physical wear.
- Mesh Aperture: The 358 mesh has a tight aperture of 76.2mm x 12.7mm (3 inches by 0.5 inches), which significantly reduces the risk of climbing or cutting through the fence.
- Installation: The mesh is securely anchored into the concrete base along its entire length to prevent lifting, ensuring a robust and continuous security barrier. This complies with BS 1722 Part 10.
4. Access Gates: Secure access is facilitated through purpose-built gates, designed to handle both personnel and vehicle traffic.
- Construction: The gates feature welded frames made from 50x25mm hollow section steel, with additional 25x12.5mm hollow section stirrups and bracing for added strength and stability.
- Dimensions: Double swing gates measuring 2.1 meters high and 6 meters wide provide ample passage for vehicles and personnel while maintaining high-security standards.
- Ironmongery: The gates are equipped with high-quality locking mechanisms, hinges, and latches, ensuring secure and controlled access at all times.
Compliance and Standards
All materials and installation procedures are fully compliant with relevant British Standards to ensure the system’s quality, durability, and effectiveness:
- BS 1722: Specifies requirements for fencing materials, construction, and installation. Part 10 addresses the installation of anti-climb fences, including the use of mesh and wire elements.
- BS EN standards: Relevant standards for galvanization and coating materials are adhered to, ensuring the longevity and performance of the system.
358 Anti-climb Mesh Panels with green powder coating topped razor wire for airport fencing
358 Anti-climbing Mesh Security Fence
High Security Fence with Electric Fence, CCTV system and gates, for prison and other uses
358 Security Prison Mesh Fencing Project
This project entails the supply and installation of 150 feet (approximately 46 meters) of 358 security fencing, designed to provide high levels of security. The fencing will stand 2.7 meters tall and will be implemented to protect sensitive areas from unauthorized access.
Fencing Specification: 358 Mesh
- The 358 fencing system, also known as "prison mesh," features a mesh size that is 3 inches by 0.5 inches (76.2mm x 12.7mm), making it difficult to climb or cut. This specification ensures enhanced security, providing a robust deterrent against intrusion. The design is also resistant to tools commonly used for unauthorized entry, ensuring that the fence serves as a highly effective barrier for high-security environments.
Materials Provided
The project will include all necessary materials required for a complete installation:
- Fencing Posts: Durable posts designed to support the height and strength of the 358 mesh.
- Post Fasteners: Secure fastening components to ensure stable and long-lasting installation.
- Wire: Additional wire elements to enhance the overall security features of the fence.
These materials will be selected to meet industry standards, ensuring optimal performance in various environmental conditions.
Installation Requirements
- All materials will be delivered and ready for a smooth and efficient installation process. Our team will ensure that all components are securely installed, with careful attention to detail to guarantee both functionality and aesthetics. The 2.7-meter height and the robust nature of the 358 fencing will make this system highly effective for areas that require advanced protection.
High-security mesh fencing features anti-climb welded panels supported by high-security posts. The finger-proof mesh with 4mm wire diameter creates a robust barrier, highly resistant to climbing and cutting with standard tools. Available in heights up to 6m, this system effectively deters intruders. For detailed specifications, please see the attached document.
