Is barbed wire cheap?

Mesh of metal strips with sharp edges to prevent trespassing

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Barbed tape or razor wire is a mesh of metal strips with sharp edges whose purpose is to prevent trespassing by humans. The term "razor wire", through long usage, has generally been used to describe barbed tape products. Razor wire is much sharper than the standard barbed wire; it is named after its appearance but is not razor sharp. The points are very sharp and made to rip and snag clothing and flesh.

The multiple blades of a razor-wire fence are designed to inflict serious cuts on anyone attempting to climb through or over it and therefore also has a strong psychological deterrent effect. Razor wire is used in many security applications because, although it can be circumvented relatively quickly by humans with tools, penetrating a razor-wire barrier without tools is very slow and typically injurious, often thwarting such attempts or giving security forces more time to respond.

Use

The first use of barbed wire for warfare was in during the Spanish American War, thirty-one years after the first patents were issued in . One of the most notable examples during the Spanish American War is the defense provided by the Moron-Jucardo Trocha. The trocha (or trench) stretched for fifty miles between the cities of Moron and Jucardo. Within this trench, and in addition to fallen trees, barbed wire was used. The barbed wire was arranged in a cat&#;s cradle formation that for every 12 yards of barbed fence built, 420 yards of barbed wire was strung (or 35 yards of wire per yard of fence).[1]

Later versions of this type of barbed wire were manufactured by Germany during the First World War. The reason for this was a wartime shortage of wire to make conventional barbed wire. Therefore, flat wire with triangular cutting edges began to be punched out of steel strips ("band barbed wire"). A welcome side effect was that a comparable length of barbed wire of this new type could be produced in less time. These precursors to NATO wire did not yet have an inner wire for stabilization, were therefore easy to cut with tin snips, and were also not as robust as normal barbed wire. However, they withstood the wire cutters used at the time to cut normal barbed wire, as was common at the front.[2][3][4][5]

An article in a issue of The Hardware Trade Journal tells the story under the headline: "This Cruel War&#;s Abuse of Our Old Friend &#;Bob Wire.'" After telling a little about Glidden and his invention, the article goes on as follows: "Quite naturally some animals enclosed by Glidden&#;s fencing gashed themselves on the barbs. Just as naturally, men and boys tried to climb over or under those fences and had their clothes and flesh torn...These wounds upon man and beast and the suddenness with which Glidden&#;s barbs halted all living things came to the attention of military men, and the barbed wire entanglement of which we now read almost every day in the war news was born...And it may be said right here that soldiers who have been halted by wire entanglements while making a charge say the devil never invented anything nastier."[6][7]

Starting in the late s, barbed tape was typically found in prisons and secure mental hospitals, where the increased breaching time for a poorly equipped potential escapee was a definite advantage. Until the development of reinforced barbed tape in the early s (and especially after the September 11 attacks), it was rarely used for military purposes or genuine high security facilities because, with the correct tools, it was easier to breach than ordinary barbed wire. Since then, some military forces have replaced barbed wire with barbed tape for many applications, mainly because it is slightly lighter for the same effective coverage, and it takes up very little space compared to barbed wire or reinforced barbed tape when stored on drums.

More recently,[when?] barbed tape has been used in more commercial and residential security applications. This is often primarily a visual deterrent since a well-prepared burglar can breach barbed wire and barbed tape barriers in similar amounts of time, using simple techniques such as cutting the wire or throwing a piece of carpet over its strands.

Due to its dangerous nature, razor wire/barbed tape and similar fencing/barrier materials are prohibited in some locales. Norway prohibits any barbed wire except in combination with other fencing, in order to protect domesticated animals from exposure.[8]

Construction

Razor wire has a central strand of high tensile strength wire, and a steel tape punched into a shape with barbs. The steel tape is then cold-crimped tightly to the wire everywhere except for the barbs. Flat barbed tape is very similar, but has no central reinforcement wire. The process of combining the two is called roll forming.

Types

Like barbed wire, razor wire is available as either straight wire, spiral (helical) coils, concertina (clipped) coils, flat wrapped panels or welded mesh panels. Unlike barbed wire, which usually is available only as plain steel or galvanized, barbed tape razor wire is also manufactured in stainless steel to reduce corrosion from rusting. The core wire can be galvanized and the tape stainless, although fully stainless barbed tape is used for permanent installations in harsh climatic environments or under water.

Barbed tape is also characterized by the shape of the barbs. Although there are no formal definitions, typically short barb barbed tape has barbs from 10&#;12 millimetres (0.4&#;0.5 in), medium barb tape has barbs 20&#;22 millimetres (0.8&#;0.9 in), and long barb tape has barbs 60&#;66 millimetres (2.4&#;2.6 in).

According to the structure

• Helical type: Helical type razor wire is the most simple pattern. There are no concertina attachments and each spiral loop is left. It shows a natural spiral freely.
• Concertina type: It is the most widely used type in the security defense applications. The adjacent loops of helical coils are attached by clips at specified points on the circumference. It shows an accordion-like configuration condition.
• Blade type: The razor wire are produced in straight lines and cut into a certain length to be welded onto the galvanized or powder coated frame. It can be used individually as a security barrier.
  • Flat type: A popular razor wire type with flat and smooth configuration (like Olympic rings). According to different technology, it can be clipped or the welded type.
  • Welded type: The razor wire tape are welded into panels, then the panels are connected by clips or tie wires to form a continuous razor wire fence.
• Flattened type: A transformation of single coil concertina razor wire. The concertina wire is flattened to form the flat-type razor wire.

According to the coil type

• Single coil: Commonly seen and widely used type, which is available in both helical and concertina types.
• Double coil: A complex razor wire type to supply higher security grade. A smaller diameter coil is placed inside of the larger diameter coil. It is also available in both helical and concertina types.

Common specifications of razor wire

• Short barb razor wire with central reinforcement

• Medium barb razor wire

• Long barb razor wire on a fence. At the bottom there is some barbed wire

See also

References

• Barbed tapes at Wikimedia Commons

How Much Does a Barbed Wire Fence Cost?

Barbed wire fences are made of galvanized steel wire and punctuated with evenly spaced sharp metal barbs. This type of wire fence was invented in the &#;s primarily as a method of keeping wild animals off private lands or domesticated animals in or on people's lands. In addition to livestock fencing and farm fences, barbed wire fences are also used in industrial settings or as an affordable way to provide security for an area. The national average cost for a barbed wire fence is about $3,600, with an average range of about $1,500 to $5,800. Of course, there is a wide range because of how barbed wire fences are typically used. If you are enclosing a large range area, installing a new barbed wire fence could be over $10,000. On the other hand, if you are simply enclosing a small yard, your fence project could easily be less than $1,000 to install a barbed wire fence.

Barbed Wire Fence Cost Calculator

With the average total cost of barbed wire fences varying so widely, how can you get an accurate estimate for your project? Luckily, Ergeon has a fence calculator that you can use to get a reliable estimate for your custom fence. Our fence calculator lets you customize your type of fence according to style of fence, fence height, fence material, gate options and more! Once you have designed your fence, Ergeon&#;s fence calculator builds a high quality 3D model so that you get an accurate vision of what your fence will look like. Finally, the fence calculator will calculate the estimated cost per linear foot of your fence design.

Barbed Wire Fence Cost per Linear Foot

The cost of barbed wire fencing is based on linear feet, as we discussed in the previous section. However, it is calculated a little differently than a wooden fence or a vinyl fence per linear foot. That&#;s because you will pay between $.0.04 and $0.15 per linear foot per strand you need for your fence. For example, if you have three strands of barbed wire you would multiply that number per linear foot by the number of strands. The cost per linear foot varies a bit by type of barbed wire, thickness, whether the strands are coated, and the quality you choose. We will go into more detail on these and other factors in the next section.

Barbed Wire Fence Cost Factors

Number of Strands

The number of strands you plan to have on your barbed wire fence is a major factor in the overall cost. That is because you will calculate the total cost in terms of linear feet and then multiply that by the number of strands. The typical barbed wire fence has between three and five strands total.

Coating

Barbed wire fencing is typically made from galvanized steel wire strands. That means it is coated with zinc to prevent rust and corrosion of the wire strands. There are different levels of zinc coatings, and you can opt for a stronger zinc coating if necessary. Another type of coating you can get on your barbed wire fencing is vinyl, or pvc, coating. This also helps to protect against rust and corrosion.

Wire Thickness

The wire thickness, referred to as the gauge or tensile strength of the barbed wire, determines how strong the fence will be. Contrary to what you would expect, a higher number of wire gauge is actually a thinner wire than low number gauges. The larger the number, the smaller the wire. The gauges range from 9 to 20 in most cases. The wire thickness you choose depends on the use you have in mind for the fence. If it needs to stand up to large animals, you will probably want a high tensile wire strand. If it is a security fence, then the tensile strength might not matter as much to you.

Number of Posts

Like the gauge of the wire, or wire thickness, the number of fence posts and type of posts you need for your purposes will depend on what you plan to use the fence for. There are several options for post types: metal t posts, wood posts, or steel posts. T posts are the cheapest, usually costing between $7.50 and $13.50 per post, and can be used for line posts but not corner posts or end posts because they are not strong enough. Next are wooden posts which typically cost between $10 and $40 per post depending on the type of wood and size of the post. Finally, metal beams and pipes are the strongest and will cost you between $20 and $50 per post. These are recommended for fences that need to keep large animals inside.

Number of Barbs

For number of barbs, you will usually have the choice between a two barb or a four barb wire strand. Four strand wiring will cost about 10 to 20 percent more than two barb wire strands. The barbs are the sharp points of contact spaced four to five inches apart on the wire strands to keep out wild animals or trespassers.

Labor Costs

The cost to build a barbed wire fence using professional installation is between $16 and $20 per hour, on top of the materials costs. So, by installing your new barbed wire fence by yourself as a DIY project you could save hundreds of dollars on the total fence installation cost. However, keep in mind that barbed wire is sharp and difficult to work with, so letting the professionals handle it might be a better idea than trying to put that up by yourself. Sometimes paying a little more on your fence prices could pay off by saving you stress and even injury!

Terrain and Slope

The cheapest spot to install a barbed wire fence is a flat open area with nothing that needs to be dug out or moved out of the way. However, that is not always the case. When the terrain has obstacles or is sloped, that can add to the overall cost of the barbed wire fence installation. That is because it could take extra time to prepare the area for the new fence to be put up.

Barbed Wire Fence Cost by Fence Type

Cattle Barbed Wire Fence

A cattle barbed wire fence costs on average between $1 and $6 per linear foot. It is usually between 50 and 54 inches tall and has between three and five strands.

Security Barbed Wire Fence

If you need extra security on top of your cattle barbed wire fence, that is called a security barbed wire fence. It is put on top of the cattle fence using pole extensions and can add between three and six additional strands for extra protection. This usually costs between $0.50 to $0.70 per linear foot and is made of closely spaced razor wire installed at an angle to make sure it cannot be climbed over.

Razor Barbed Wire Fence

Razor wire will cost you between $0.50 and $1 per linear foot. Instead of the wire barbs on a normal barbed wire fence, razor wire is made of razor blades that can seriously injure animals, so it is not recommended for livestock use.

How Much Does a DIY Barbed Wire Fence Cost?

Homeowners or land owners can save a significant amount on the total cost by installing their barbed wire fence by themselves as a DIY project. The overall savings amount to 30-40 percent compared to having a barbed wire fence professionally installed. However, it requires at least two people and can be dangerous because of the sharp points, so this should be considered carefully.

Frequently Asked Questions (FAQs)

How do you stretch a barbed wire fence?

Barbed wire fences should be tightened so that they provide the security and function the homeowner or land owner is looking for. To stretch a barbed wire fence, one end should be attached to a post and then the strand should be stretched out using a hand-operated winch to the proper tension. Over stretching can lead to breakage, and injury, so be sure not to over tighten.

How many rolls of barbed wire can fence 1 acre?

You will need about half of a roll of barbed wire fence for 1 acre. A typical roll of barbed wire is 1,320 feet and that will cover 2 acres.

What is the life expectancy of a barbed wire fence?

The most basic galvanized steel wiring for a barbed wire fence will have a lifespan of between 2 and 11 years. In a coastal environment that lifespan will be a bit shorter, as rust could set in earlier.

What are the limitations of barbed wire fences?

Barbed wire stands rust over time, and is not very durable in wet climates.

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