What is a 358 High Security Fence?
A 358 high security fence is a welded mesh security barrier featuring 3-inch horizontal × 0.5-inch vertical openings with 8-gauge wire. The name "358" refers to these precise measurements: 3" × 0.5" × 8 gauge, creating an anti-climb fence that prevents finger or toe holds while maintaining excellent visibility.
This prison fence standard has become the benchmark for high-security perimeter protection across correctional facilities, airports, and critical infrastructure worldwide.
Technical Overview
358 Fence Engineering Specifications
The 358 fence design combines three critical security elements:
Mesh Configuration: 76.2mm × 12.7mm openings prevent tool insertion
Wire Gauge: 4mm diameter provides structural integrity
Welded Construction: Every intersection welded for maximum strength
Weldmesh Fence Structural Advantages
Unlike chain-link alternatives, weldmesh fence construction offers:
Superior Rigidity: Welded joints eliminate flex points
Enhanced Durability: Reduced stress concentration at connection points
Consistent Geometry: Precise mesh alignment throughout panel height
Security Performance Analysis
Anti-Climb Fence Protection Mechanisms
The anti-climb fence design prevents unauthorized access through:
Physical Barriers:
Narrow mesh openings block finger/toe insertion
Smooth surface profile eliminates grip points
High tensile strength resists cutting attempts
Visual Deterrence:
Clear sight lines for security personnel
Intimidating appearance discourages breach attempts
Professional aesthetic maintains facility image
Prison Fence Compliance Standards
Security fence panels must meet rigorous correctional facility requirements:
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: Quality management system certification
Product Specifications & Configurations
Security Fence Panels Technical Parameters
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 |
358 Fencing System Components
Core Elements:
Welded mesh panels with reinforced edges
Heavy-duty steel posts (RHS or SHS)
Tamper-proof fixing brackets and bolts
Optional Enhancements:
Prison barbed wire or razor wire topping
Anti-dig concrete foundations
Electronic detection integration points
Surface Protection:
Hot-dip galvanizing (minimum 85 microns)
Polyester powder coating over galvanizing
Marine-grade options for coastal installations
Applications & Implementation
Critical Infrastructure Protection
Correctional Facilities:
Perimeter security with clear sight lines
Internal compound separation
Vehicle sally port applications
Transportation Hubs:
Airport runway protection
Rail depot security boundaries
Port facility access control
Industrial Security:
Data center perimeters
Power generation facilities
Chemical processing plants
For additional perimeter protection, explore our razor wire fencing solutions or consider temporary security fencing for construction sites and events requiring flexible security arrangements.
Security Level Classifications
Risk Level | Height Range | Additional Features |
Medium | 2.0m - 2.4m | Standard mesh only |
High | 2.4m - 3.0m | Barbed wire topping |
Maximum | 3.0m+ | Razor wire + detection |
Installation & Maintenance Guidelines
Professional Installation Requirements
Site Preparation:
Boundary survey and marking
Underground utility location
Ground condition assessment
Foundation Specifications:
Post hole dimensions: minimum 500mm × 500mm × 800mm depth (19.7" × 19.7" × 31.5")
Concrete footings: minimum 600mm depth for standard installations
Post embedment: 1/3 of above-ground height
Anti-dig barriers where specified
Panel Installation:
Precise alignment using laser levels
Tamper-proof fixings throughout
Quality control at each stage
Maintenance Protocols
Regular Inspections:
Monthly visual checks for damage
Annual structural integrity assessment
Post-storm damage evaluation
Preventive Maintenance:
Coating touch-ups as required
Vegetation clearance (2m minimum)
Hardware tightening schedule
Technical Support & Design Services
We provide comprehensive project support including:
CAD Drawings: Detailed technical specifications and layout plans
Risk Assessment: Security vulnerability analysis and recommendations
Installation Guides: Complete video tutorials and written instructions
Technical Documentation: Engineering calculations and compliance certificates
Conclusion
As a leading 358 fence supplier, we deliver engineered security solutions that meet demanding high-risk facility requirements. Our high security fence systems combine proven anti-climb technology with comprehensive technical support.
Contact our security fencing specialists for detailed engineering specifications, project consultation, and competitive quotations tailored to your facility's security requirements.
