Concertina Razor Wire Security Fence – Technical Overview

Concertina razor wire consists of coiled steel strips with sharp barbs that form a helical barrier. When tensioned, the coils expand to create a dense, tangled obstacle that resists cutting and climbing.

The product is supplied in continuous rolls that can be uncoiled and fixed to posts, walls, or ground anchors to create a perimeter deterrent.

Design and Geometry

The coil diameter typically ranges from 450 mm to 600 mm, influencing the overall height of the deployed barrier.

Barb length varies between 22 mm and 30 mm, with spacing along the strip kept at approximately 100 mm to ensure overlapping points when coiled.

Tensile strength of the base steel is specified at minimum 550 MPa, providing sufficient resistance to manual cutting tools.

Material Composition

Core material is cold‑rolled low‑carbon steel, often grade Q195 or equivalent, selected for its formability and strength.

Surface protection is achieved through hot‑dip galvanization, delivering a zinc coating thickness of 40 µm to 60 µm for corrosion resistance in outdoor environments.

Optional PVC or polyester coating can be applied over the zinc layer, adding a color‑coded finish and extra barrier against UV degradation.

Manufacturing Process

Steel strip is slit to the required width, then passed through a series of rollers that press the barbs into the edge at precise intervals.

The stripped edge is subsequently coiled around a mandrel, forming the helical concertina shape while maintaining uniform tension.

After coiling, the product undergoes a continuous galvanizing line where the zinc bath temperature is kept around 450 °C to ensure proper alloy formation.

Performance Characteristics

When installed at a recommended pre‑tension of 1.5 kN per meter, the fence presents a shear resistance exceeding 8 kN before permanent deformation occurs.

Corrosion testing per ISO 9227 shows no red rust after 500 hours of salt‑spray exposure for the galvanized variant.

Impact resistance is validated by dropping a 5 kg steel ball from a height of 1 m onto the coiled barrier; the wire retains its shape without strand breakage.

Typical Applications

Prison and detention facility perimeters benefit from the concertina’s ability to delay intruders, giving response teams additional reaction time.

Military bases and forward operating sites use the wire as a low‑cost, rapidly deployable obstacle that can be reclaimed and reused.

Industrial storage yards and data centres install the fence along external walls to deter climbing and provide a visible security boundary.

Customization Options

Coil diameter can be adjusted between 400 mm and 700 mm to match site‑specific height requirements.

Barb length and spacing are selectable; longer barbs increase deterrence while tighter spacing raises the difficulty of manual breach.

Length per roll varies from 10 m to 50 m, allowing contractors to minimize joints during installation.

Coating choices include plain galvanized, green PVC, or grey polyester, each with distinct corrosion‑life expectations.

Quality Control and Testing

Every roll undergoes visual inspection for barb uniformity and coil tightness under 10× magnification.

Tensile strength is verified on a sample strip using a universal testing machine at a strain rate of 10 mm/min.

Coating thickness is measured with a magnetic‑induction gauge at five points per meter, accepting only values within the specified tolerance.

Final packaging includes a corrosion‑inhibiting interleaf paper between layers to prevent surface damage during transit.

Packaging and Shipping

Rolls are wound onto a cardboard core, then wrapped in shrink‑film to protect against moisture and abrasion.

Each pallet holds up to 20 rolls, secured with steel straps and corner protectors for stable container loading.

Shipment documents include material test certificates and a packing list that details coil diameter, length, and coating type per roll.

Typical Specification Ranges

Frequently Asked Questions

Can dimensions be customized?

Yes, coil diameter, barb length, and roll length are adjusted according to project drawings; provide the required height and spacing to receive a detailed quote.

What information is required before quotation?

Project location, desired coating type, estimated perimeter length, and any specific mounting details (post size, anchor type) enable accurate pricing and lead time.

What materials are available?

Base steel is cold‑rolled Q195 or equivalent; surface finishes include hot‑dip galvanized, PVC‑coated, or polyester‑coated options.

How is quality inspected?

Each batch receives visual barb inspection, tensile testing on samples, and coating thickness measurement per ISO standards before packaging.

For technical data sheets, sample requests, or project‑specific quotations, please contact our engineering team.