Frequently Asked Questions About Concertina Coil
What is a Concertina fence?
A Concertina fence is a high-security perimeter barrier made from coiled razor wire or razor barbed tape. The coil expands like a concertina and forms a strong physical and visual obstacle designed to deter unauthorized access and intrusion.
Why is Concertina wire fencing effective for security purposes?
Concertina wire creates a closely spaced, difficult-to-cross physical barrier. Its razor-barbed configuration makes climbing or passing through the barrier difficult while also providing a strong visual deterrent.
It can be installed above boundary walls, on fences and on purpose-built posts, making it suitable for a wide range of perimeter-security applications.
If concertina coil is simply razor wire wound into a coil, how is it better than razor wire?
The key point is: Concertina Coil isn’t inherently “better” than straight razor wire. It is a different configuration of the same basic material, designed for a different security purpose.
The coil gives razor wire some important physical advantages:
| FEATURE | STRAIGHT RAZOR WIRE | CONCERTINA COIL |
| Basic material | Razor wire | Razor wire |
| Shape | Linear | Helical/spiral |
| Barrier depth | Relatively thin | Much deeper 3D barrier |
| Area covered per metre | Relatively limited | Large barrier volume |
| Climbing difficulty | High | Very high |
| Can be stretched between posts | Yes | Yes |
| Can be installed on top of a fence/wall | Yes | Very common |
| Can be installed independently as a barrier | Limited | Yes |
| Typical visual deterrence | High | Very high |
Why the coil matters – Imagine these 2 scenarios:
You have 10 meters of straight razor wire. If you put it along the top of a wall, you essentially have a linear strip of sharp wire
Now take the same 10 meters of razor wire and form it into a concertina. When expanded, it creates a three-dimensional obstacle.
Someone trying to get over the wall encounters that strip.
The person encounters a relatively deep mass of overlapping loops and blades.
That’s the real advantage of concertina coil over a straight razor wire.
How is commercial concertina coil manufactured to ensure consistent quality?
A commercial concertina coil is normally made using dedicated machinery/jigs so that:
- the coil diameter is consistent;
- the loops have the correct pitch/spacing;
- the razor tape isn’t damaged or distorted;
- the wire maintains the required tension and shape;
- the finished coil can be compressed and expanded predictably;
- the coils can be secured with the appropriate clips/supports.
Why is Tata Kosh steel used for BSMW Concertina wire fences?
Tata Kosh steel provides the strength and consistent material quality required for manufacturing durable Concertina Coil. BSMW uses Tata Kosh steel sheet for its razor barbed tape, which is clipped onto high-tensile spring steel wire to create a strong and resilient Concertina Coil.
The quality of the raw materials plays an important role in the strength, durability and performance of the finished Concertina Coil.
What kind of animals can Concertina Coil keep out?
Concertina Coil fencing can help deter a range of animals from entering a protected perimeter. The sharp blades of razor wire can discourage stray dogs, cattle, goats, pigs, monkeys,
snakes, wild hogs and even wild animals from crossing boundary fencing. When properly installed as part of a perimeter security system, Concertina Coil provides an additional physical barrier around industrial sites, farms, warehouses and other properties.
Does Concertina Coil have to be wall-mounted? Can it be placed on the ground also?
Concertina Coil does not have to be wall-mounted. Concertina Coil fencing can be installed on walls, boundary fences, gates and other perimeter structures, as well as on the ground where the site and application are suitable. Ground-mounted razor wire can provide an additional perimeter security barrier around open boundaries, industrial sites, farms and other areas requiring enhanced boundary protection.