358 Security Fence: Anti-cut fence, Anti-climb Mesh Security Fence
358 mesh fencing provides the highest degree of physical perimeter protection, ideal for sensitive areas requiring the maximum degree of security. From prisons and nuclear establishments; to computer centres, research laboratories and warehouses; to schools and retail areas, 358 mesh security fencing will provide outstanding security.
The ‘358’- style high security galvanized fence. The fence shall be a single layer welded mesh design with minimum 4milimiters (mm) horizontal and vertical circumference wires (horizontal wires to be on attack side);
The resulting mesh dimension shall not be larger than 76mm wide by 13mm high;
The length of each fence panel shall be 2.5m
Barbed tape concertina with 7 clips per spiral and short blades at 25mm centres;
Advantages :
The aperture is 72.2mm horizontal x 8.7mm vertical and makes 358 security fencing extremely difficult to penetrate using conventional hand tools, thus providing a high delay factor.
Despite the high degree of security, the visual impact of a 358 fence on the environment remains very discreet. It is specifically configured to give maximum visibility (important for clear camera surveillance and to identify intruders.)
358 security fencing is designed for compatibility with electronic alarm and detection systems.
Weld strength of this kind of security fencing is minimum of 75% to steel strength guaranteed on every weld.
Common sizes:
358 security fence
Inner aperture:72.2×8.7mm
Wire diameter:4mmm
Width: to 2.8m
Tensile of the wire:600-750N/m2
Welded strength:60%-80%
Height: to 6m
Surface treatment：
Zinc Class A (min. 275g/m²) or Class C (min. 110g/ m²) - coated - PVC Coating Optional. Heavy galvanised wire Class A (min. 275g/m²) or Lightly Galvanised wire Class B (min. 135g/m²) - coated - PVC Coating Optional.
Africa customer case
We supply high security 358 mesh fence with Electric fence system. 358 Mesh with 1600 x 80x60x4mm RHS posts and 50 x 80x60x4mm RHS posts with 250x250x10mm base plates and M20 mounting holes on them. 6x6 meter double swing gates with heavy duty mounting posts and swing 380Vac motors for automation.
The fence is galvernised, PVC powder coat in RAL 6005 green colour including the electric fence posts. Insulators need to be in military green.
Also include 300mm "Y" standard posts with 4x 10mm holes 100mm centers covering 3700 meters, 1600 x 1300meters height. Also include 20,000 meters 8mm steel rope to be mounted with "Y" standard posts.
Technical Specification
The supply, manufacture and delivery to site, installation and commissioning of a complete 2.4m high x 3700m long perimeter security anti-climb fence with a 3.4m high multi zone Electric fence system. The fencing system shall be installed with all the components that enable it to be functional.
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 |
Additional Features
The strain and intermediate post shall be a minimum 2mm thick steel post. fully galvanised to meet BS EN ISO 1461. The post is to be pre-drilled at 91 mm centres for the length of the post. with additional mounting holes to alloxv the posts to be bolted to the host fence.
All holes and cuts are to be performed prior to galvanising.
The xvire is to conform to BS 1 722: 17.
Strain Insulators for End or Corner Posts: Made of High quality Industrial Plastic Virgin Nylon rated for 15KV UV Stabilized. Reel Insulators: Made of virgin Polypropylene plastic rated for 1 5K V UV stabilized". The design of the insulator shall be such that:
1. When the weak claw snaps off the wire gets trapped between the post and insulator thus creating an alarm condition.
2. When the Wire is tensioned it cannot be removed from the insulator.
3. The securing pin is locked in position and is difficult to remove without significant force.
The strain insulator shall be manufactured from a high-density polymer; military green in colour and fully UV stabilised to prevent degradation.
The insulator shall be able to withstand tensions in excess of 601kg. and shall provide adequare insulation between the eaflhed fence post and the live wire.
The tensioning strainer including wheel and locking device shall be manufactured entirely from a high-density polymer; military green in colour and fullv UV stabilised to prevent degradation.
The tensioning wheel shall as a minimum have 30 incremental positions per complete only is allow for fine tensioning and able to be adjusted with a ratchet tensioner.
The high voltage gate switch (HVGS) shall be manufactured from a heavy durable plastic suitably reinforced for use on 358 Mesh fencing and heavy gates. The design of the HVGS shall be such that:
1. It will be possible to take the zone feed and return through the switch.
2. The earth is incorporated in the body of the switch.
3. A dead short is placed across the zone when the gate is in the open position. to prevent bypassing of the switch.
For internal comers the Pull-Througlfwheel shall be manufactured from a high-density polymer; military green in colour and fully UV stabilised to prevent degradation. The wheel shall allow retrospective installation after the wire has been strung, and be suitable for any internal angle horizontally. The design of the wheel shall be such that it allows even tensioning across the elevation.
The lead-out cable shall consist of a steel wire. diameter 2.7mm, with a resistance of no rnore than I l ohms per kilometre. The cable shall be encased in a double insulation rated for 15kv isolation, and made of a material suitable for the pulling through ducts without damage to the insulation.
The warning signs shall be manufactured and displayed on the fence according to BS EN ISO 60335-2-76 and BS 1722:17
General Construction Specification
The electric fence shall comprise of minimum 38 high tensile wires strung between two strain points at intervals of no more than 91mm vertically, from ground level up to a height of 1000mm minimum above the height of the physical host fence in all areas.
height of the electric fence is to be 3.4m
The bottom wire of the electric fence shall be no further than 125mm from the concrete steel ground.
All electric fence wires either live or earth shall be a minimum of 30mm from any steelwork either on the physical fence or otherwise to prevent potential short circuits and subsequent nuisance alarms.
The warning signs shall be attached to the physical fence, not the electric fence wires.
All double leaf gates will be zoned independently and fitted with a High Voltage Gate Switch (HVGS).
Emergency egress gates should be designed and configured as independent zones, or may be incorporated into the adjacent zone if they are seldom used, but in both cases the gate must be fitted with a HVGS. Details to be supplied at site visit.
All strain points shall be externally protected by anti-climb configuring to be fitted in series at all times. The number of anti-climb wires will be a minimum of 6
All intermediate posts shall be fitted with a 'weak-claw' insulator.
All fence controllers shall be sited in such a manner that the zones are fed directly from the fence controller via ducting or equivalent to the zone start strain point.
All fence controllers shall be appropriately housed in a building or purpose built IP68 arated external cabinet. The ZPC will detail the exact position of the Controller ard key pad at site visit.
Site specific construction requirements
Where required all existing physical fence strain points will be replaced with a fit for purpese SHS post of suitable height and section 10 support the full length of the Post. Where possible the post will be prefabricated xvith the physical post with a hot dipped galvanises finish.
Each linear zone may be split into two vertical fence channels, upper and lower.
Fence Controllers to be housed in the secure container, within the Listed Buildings compound as per the ZPC's instructions.
The electric fence shall be designed as a clear view fence
Control and Operation
Control and monitoring of the electric fence shall be done via a central station.
Provision for connection of the electric fence to the CCTV system should be available.
On Each zone Controller. Each fence output is programmable and can be used to monitor a separate zone of the fence. In the event of a security breach the system identify the zone in which the alarm has occurred
High Voltage Zone Separation shall ensure that if an intruder attacks one zone of the fence, the performance of the remaining zones will not be affected in terms of voltage and detection capability.
Selectable Zone Control: The controller will have the ability to exclude fence zones from the system to allow for partial arming of the site.
Smart Battery Backup: In the event of mains power failure the system will automatically switch over to the back-up battery system. While powered by the battery, the system will monitor the duration of the power failure and the condition of the battery. The controller will be able to support the fence in High Voltage mode for an 8 hour period.
Green PVC Coated Steel Weld Mesh High Security Fencing Panels
358 Mesh, Hot Dipped Galvanised and Vinyl Powder coated in black
Supply 358 Steel Work For Airport Security Fence
- 3mm, hot dipped galvanized high tensile steel wire to the pre drilled holes in the Reinforced concrete post in three lines to receive welded mesh in accordance to BS 1722.
- Three lines of strand galvanized barbed wire (3mm) in equal rows to the pre drilled r.c posts,3mm, hot dipped galvanized.
- Coiled razor wire of 600mm diameter fixed to three lines of strand galvanized barbed wire(3mm) in equal rows to the pre drilled Reinforced concrete posts
.Fence posts shall be provided with a double cranked extension arms as described in BS 1722 (10). - 2400mm high galvanized welded mesh in anchored into the concrete at the bottom along the entire length in accordance to BS 1722 Part 10. It shall be a 2.4meter high fence with an additional 0.3meter buried beneath ground level (2.7meter total). The mesh shall be 3mm diameter steel wire, zinc coated with an outer plastic sheath.
- Supply and fix standard steel gate welded 50x25mm hollow section frame with 25x12.5mm hollow section stirrups and bracing double swing 2100mm high by 6m wide complete with iron mongery.
358 welding wire mesh 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
