What Is A 358 Fence?
A 358 fence, also known as "prison mesh" or "anti-climb fence," is a high-security welded mesh fencing system specifically engineered to provide maximum protection against climbing, cutting, and intrusion. The term "358" refers to its mesh configuration: 3 inches × 0.5 inches (76.2 mm × 12.7 mm) with 8-gauge wire (approximately 4 mm thick). This tight mesh spacing makes it virtually impossible for fingers or tools to gain a foothold, preventing climbing, while also resisting penetration by wire cutters or saws. Despite its density, the fence maintains excellent visibility, allowing for clear surveillance and integration with security cameras and motion sensors. Typically constructed from galvanized steel and finished with a durable polyester powder or PVC coating, the 358 fence offers long-lasting resistance to corrosion, UV exposure, and extreme weather. It can be installed with heavy-duty steel posts and anti-tamper fixings, and is often topped with razor wire, spikes, or electronic detection systems for additional deterrence. This fencing system is widely used in high-risk or sensitive areas, including prisons, military facilities, airports, data centers, substations, and government buildings. It is valued for its strength, durability, and low maintenance requirements, providing a secure boundary without compromising visibility or operational efficiency. The 358 fence can also be adapted to sloped terrain and customized in height, usually ranging from 2 to over 5 meters, depending on security needs. In summary, a 358 fence is a professional-grade security barrier that delivers unmatched performance in environments where safety and perimeter control are critical, combining physical strength with intelligent design to deter even the most determined intruders.
Why Is It Called 358 Mesh?
The term "358 mesh" refers to a specific type of high-security welded wire mesh fencing, named after the dimensions of its mesh openings and the thickness of the wire used. The numbers "358" represent three key measurements that define the fence’s structure: the "3" stands for 3 inches, which is the length of each rectangular opening; the "5" stands for 0.5 inches, the width of each opening; and the "8" refers to the wire gauge, which is typically 8-gauge wire, about 4 millimeters thick. These precise dimensions create a dense and rigid mesh panel with very small openings measuring approximately 76.2 mm by 12.7 mm. This design is purpose-built to prevent climbing, cutting, and breaching because the narrow vertical gaps make it impossible to get a proper foothold or grip for climbing, while the thick wire resists cutting tools and impact. The 358 mesh’s tightly woven grid also allows for high visibility, which is essential for security surveillance, enabling guards and cameras to monitor activity without obstruction. Often called "prison mesh" because of its widespread use in correctional facilities, the fence is also utilized in airports, military bases, utilities, and other sensitive locations that require stringent security measures. The galvanized steel construction with polyester or PVC coating ensures durability, corrosion resistance, and weather protection, making the fence a long-lasting barrier. The name "358 mesh" succinctly communicates these essential technical specifications and security features, distinguishing it from other mesh fences with larger openings or thinner wire. In essence, the “358” designation has become synonymous with a high-security fencing standard recognized worldwide for its effectiveness in deterring intrusion and maintaining secure perimeters.
