Galvanized Concertina Wire is typically used as a security measure to deter and prevent unauthorized access to restricted areas. Its sharp edges and dense construction make it difficult for people or animals to climb over or cut through, thus providing an effective physical barrier. Therefore, it is commonly seen around military bases, prisons, government buildings, airports, and other high-security locations. Wanzhi Steel, as a professional concertina wire supplier, has a large number of commonly used wire gauges and various blade types in stock, and we also have galvanized wire and stainless steel wire options. Please feel free to contact us.

Galvanized Concertina Wire Specification

Item	Concertina wire
Place of Origin	Hebei, China
MOQ	5 tons
Material	Galvanized wire, SS wire, iron wire, Q195/Q235 low carbon wire
Surface treatment	Galvanized, PVC coated, powder coated
Wire Diameter	2.5- 4.00 mm(Customers can specify)
Coil Diameter	450-1050mm(Customers can specify)
Blades	0.5 mm × 22 mm(Customers can specify)
Roll length	15 meters each(Customers can specify)
Surface treatment	Galvanized, PVC coated
Color	Silver or customized
Package	Plastic inside and woven outside, or paper box
Samples	Available
Delivery	15-22 Days
Delivery Term	FOB, CFR, CIF, EXW
Transportation	By sea
Payment method	TT 30% Advance + 70% Balance

What is concertina wire?

Why do they call it concertina wire?

The word “concertina” originally refers to a hexagonal instrument similar to an organ, which is easy to carry and fold. The concertina wire is named because it has a wavy shape (similar to the folds of an accordion) when unfolded.

Blade specifications

Model	Thickness	Wire Diameter	Length	Width	Spacing
BTO-10	0.5±0.05mm	2.5±0.1mm	12±1mm	13mm	26mm
BTO-12	0.5±0.05mm	2.5±0.1mm	12±1mm	15mm	26mm
BTO-18	0.5±0.05mm	2.5±0.1mm	18±1mm	15mm	33mm
BTO-22	0.5±0.05mm	2.5±0.1mm	22±1mm	15mm	34mm
BTO-28	0.5±0.05mm	2.5±0.1mm	28±1mm	15mm	34mm
BTO-30	0.5±0.05mm	2.5±0.1mm	30±1mm	18mm	34mm
CBT-60	0.6±0.05mm	2.5±0.1mm	60±1mm	32mm	96mm
CBT-65	0.6±0.05mm	2.5±0.1mm	65±1mm	21mm	100mm

What’s the difference between razor wire and concertina wire?

What is the advantage of concertina wire?

Unique structure

The barbed wire (such as galvanized steel wire, stainless steel wire) is wound into a spiral shape, with hexagonal folds and wavy spirals. It can be unfolded into a dense diamond grid like an accordion, with the spikes facing outward, which has a strong visual deterrent effect.

High corrosion resistance

The surface of the steel wire is usually galvanized (hot-dip galvanized or electro-galvanized) or coated with plastic, which is suitable for outdoor humid and salt spray environments (service life 10~15 years). Stainless steel materials (304, 316) are used in high-corrosion areas.

High strength and toughness

The tensile strength of the steel wire can reach 1200~2000 MPa, and it has excellent impact and shear resistance (special hydraulic shears are required to cut it).

High protection performance

The sharp blades or thorns on the wire mesh increase the difficulty of climbing and effectively prevent illegal intrusion. After unfolding, it covers a large area and has a wide protection range.

Visual deterrence

Sharp blades or thorns and dense structures are visually deterrent and can play a certain psychological deterrent role.

Flexible installation

It can be fixed by brackets, stakes, or walls, suitable for complex terrains in mountains and along rivers; it can be quickly deployed to form a barrier in temporary scenarios (such as rescue and exercises).

Various specifications

Concertina wire has a variety of specifications to choose from, including different wire diameters, blade types, unfolded lengths, etc., to meet the needs of different application scenarios.

What are the common types of Concertina wire?

Classification by material

1. Galvanized concertina wire: The surface is galvanized to improve its durability and anti-rust ability, extending the service life of the concertina wire.

2. PVC-coated concertina wire: In addition to its aesthetics, the PVC-coated concertina wire has better heat resistance and durability than galvanized concertina wire.

3. Stainless steel concertina wire: This is the best-performing concertina wire, suitable for all environments, has extremely high rust resistance, and can maintain its original appearance after long-term use.

 

Installation method classification

From left to right in the picture.

FAQs

How sharp is concertina wire?

Concertina wire has very sharp blades welded to the core at regular intervals. It has a sharp edge and strong rigidity. The core wire is usually high-strength steel wire that can withstand large tension. It has small spaces between each coil, making the overall structure compact and difficult to penetrate, and can directly cut the skin of an intruder. If you use stainless steel concertina wire, it will be more difficult to rust and dull, and will remain shiny and sharp for a long time.

How strong is concertina wire?

Concertina wire consists of a single smooth wire diameter of 2.5 mm ± 0.2 mm. Tensile strength of the wire is 60 ± 5 kg / mm2. Galvanized wire thickness not less than 120 g/m2. Provides wire blades of galvanized sheet installed on it well and with a thickness of 0.5 mm and spacing (4 cm ± 2 mm spacing axes).

What is the difference between concertina wire and barb wire?

Barb wire is a barbed wire with twisted barbs at regular intervals and is often laid out in a straight line in areas that need protection. At the same time, concertina wire is a flat coil of two or more razor wires that expand or contract in an accordion shape. Therefore, it is sharper than barbed wire.

What size is a roll of concertina wire?

Concertina rolls. Wire diameter: 2.5- 4.00mm. Blades: 0.5 mm × 22 mm. Roll length: 15 meters each. In addition, this number is not fixed and can be adjusted according to needs. You can contact our customer service to make a request.

 

What is concertina wire made of?

Concertina wire consists of a high tensile strength core wire and a punched steel tape with barbs. The production process of combining the core with the steel tape is called roll forming. The core wire is made of galvanized wire or stainless steel wire.

How is GI concertina wire installed?

Generally concertina wire is attached every foot to the fence and every four feet to an adjoining role. Besides, concertina wire is attached with hog rings or stainless steel rebar ties. The rebar ties are used to reduce vibrations but take considerably longer to install.

Is concertina wire easy to cut?

Concertina wire is made of galvanized wire or stainless steel wire, suitable for different environments and safety levels. Its razor-like surface is difficult to crush or shear, and almost impossible to cut without specialized tools.

What is the unit weight of GI concertina wire?

Weight of the Concertina Coil ranges from 8 kgs up to 20 kgs depending on the Diameter of the Coil & turns per Coil. The greater the Diameter, the more will be the Weight of the Concertina Coil. Weight also depends on the No of Turns per Coil. Concertina Coil Weight per Meter is between 1.20 kgs to 2.20 Kgs.

What is the spacing for concertina wire?

Concertina wire coils are stretched to a maximum of 10 meters. The maximum space between the coil openings after stretching is not more than 18 cm. The core wire is galvanized high tensile wire with diameter of 2.5 mm (minimum). Razor blade with ba lade width of 22 mm and spacing of 13 mm. This number is not fixed, Wanzhi Steel accepts customized size.

What are the practical applications of GI concertina wire?

Military defense: It is often used for the protection of military bases, borders, and other areas. Its unique structure and sharp blades can effectively prevent illegal intrusion and provide high security protection.

Prison fence: In places such as prisons that require high security protection, it is used as a security fence to prevent prisoners from escaping or outsiders from illegally entering.

Airport security: As an important transportation hub, the airport has extremely high requirements for security protection. It can be used for airport fences to enhance the airport’s security protection capabilities.

Industrial and commercial areas: GI concertina wire can be installed on the fence to form an impenetrable barrier to protect the property and personnel in the area.

Private property protection: For private residences, manors, and other properties, concertina wire is also an effective means of protection. It can be installed on fences or walls to increase the difficulty of illegal intrusion.

Temporary security isolation: In large-scale events, construction sites, and other occasions where temporary security isolation is required, GI concertina wire can be quickly deployed to form a temporary security barrier.

What is the formula for calculating the weight of a wire?

In fact, you may not be sure how it’s calculated, so this formula is for your reference. The standard formula is: Weight = Volume × Density, and then the practical application if you have the diameter (D) of the wire, use the formula for the cross-sectional area (A) of a circle: A = π(D/2)^2.

Storage & Shippment

Standard Package

Concertina Wire Supplier- Wanzhi Steel

Concertina or spiral razor wire is a material with a high return on investment. It is a kind of common razor wire and occupies more than 80% of the market. It’s easy to install and has a good anti-theft effect, and it’s widely used for border fencing, and also installed on the walls for factory fencing or residence fencing. If you have any questions about the parameters, please feel free to contact Wanzhi Steel.

 

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or send an email to: info03@wanzhisteel.com

 

 

Wanzhi Steel is an ISO 9001-certified steel factory located in Hebei, China. It has been specializing in the production of  GI barbed wire, SS wire, GI Chain Link Fencing, concertina wire, Clear View Fence, GI razor wire, and Galvanized Welded Wire Mesh for 14 years, with a monthly output of 1,800 tons. With high-quality products and good services, its products have been exported to more than 120 countries around the world.

 

 

 

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