[{"category": "anti-ram", "text": "

Vehicle Barrier Fences

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What is a vehicle barrier fence?

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A vehicle barrier fence, also known as an anti-ram fence or high-security fence, is commonly installed on sites requiring more protection than a typical chain link barrier can provide. These high-security fences are specifically designed and tested to prevent Hostile Vehicle Attacks (HVA) and Vehicle Borne Improvised Explosive Device (VBIED).

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Anti-ram fencing can provide perimeter security against vehicle-borne assaults around an entire building, commercial facility, airport, correctional facility or military base. These anti-ram fence barrier systems provide a high level of protection for personnel, buildings, equipment, and hazardous materials that could be vulnerable to high-speed collisions, whether deliberate or accidental.

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How Does a Vehicle Barrier Fence Work?

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Many commercial sites, industrial and chemical plants, oil refineries and government locations are surrounded by high-security road barrier fences. Chain link fencing using standard 2 3/8ths inch diameter posts is simply not strong enough to stop penetration from a 50 mph truck loaded with explosives. Much stronger construction materials, utilizing high-level engineering, are required for anti-ram vehicle barrier fence border protection. Once designed and manufactured, expensive, live crash tests at certified testing labs must be conducted.

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What is a vehicle barrier anti-ram K-rating?

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There are several ratings test standards which can sometimes be confusing. In 1985, the Department of State (DOS) created K-ratings. They were later revised in 2003. A K-rating measures how far the front bumper of a standard 15,000-pound truck penetrates a vehicle barrier or barrier fence. In order to receive a K-rating, this distance must be less than 50-feet.

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For instance, a K-rated fence system’s stopping power is tested by crashing a 15,000-pound vehicle into the fence at a specific speed. How fast it is traveling will designate its K rating:

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K4 - 30 miles per hour
K8 - 40 miles per hour
K12 – 50 miles per hour

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The measured penetration distance is then designated by L1, L2 or L3. Each represents a specific incursion range:

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L3 = less than 3.3 feet.
L2 = 3.3 – 20 feet.
L1 = 20 - 50 feet.

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So a “K8L3” means the truck was traveling 40mph and was stopped with less than 3 feet of penetration.

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What is an ASTM F2656 anti-ram crash rating?

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The American Society for Testing and Materials (ASTM) developed a newer rating called ASTM F2656 that currently is more widely used than K-ratings. Like K-ratings, ASTM F2656 also incorporates size of vehicle (15,000 lb.truck) and its traveling speed. M ratings share similarity to K ratings in that each tests standardized speeds of 30, 40 or 50 mph. For example, a vehicle barrier fence could have the following designations:

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M30 classification - A vehicle barrier fence rated for a 30 mph impact.
M40 classification - A vehicle barrier fence rated for a 40 mph impact.
M50 classification - A vehicle barrier fence rated for a 50 mph impact.

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As always with ratings, penetration distance is key. Instead of an “L”, ASTM F2656 ratings use a “P” designation that indicates how far the motor vehicle penetrates the barrier. P ratings range from P1 to P4. Using the vehicle barrier fence example, these are the possible designations for penetration distance:

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P1 - The vehicle moves no more than 1 meter (3.3 feet) past the vehicle barrier fence.
P2 - The vehicle moves no more than 1.01 to 7 meters (3.31 feet to 23 feet) past the vehicle barrier fence.
P3 - The vehicle moves no more than 7.01 to 30 meters (23.1 feet to 98.4 feet) past the vehicle barrier fence.
P4 - The vehicle moves further than 30 meters (98.41 feet) past the vehicle barrier fence.

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Unlike K-ratings, ASTM has no penetration distance limitation. P4 means that measurement exceeded 98.41 feet.

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In summary, a M50 P1 rating translates to a 15,000 lb. truck traveling 50 mph being stopped by a vehicle barrier or anti-ram fence with less than 3.3 feet of penetration.

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Are ASTM F2656 ratings better than K-ratings?

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ASTM ratings are valuable because they can also test a wider range of vehicle sizes. This is vitally important as hostile vehicle attacks increase using different types of transports to deliver destruction.

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C-ratings designate a small Car (2430 lbs.)

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PU-ratings designate a Pickup truck (5070 lbs.)

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H-ratings designate a heavy vehicle (65,000 lbs.)

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What is a PAS 68 rating?

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Created by the British Standards Institution (BSI), many international organizations use PAS standards. A PAS68 rating can be intimidating due to its lengthy, Algebraic-looking formula that represents multiple factors, including weight and type of the vehicle, speed, angle of impact, penetration distance and debris dispersion. PAS68 ratings are similar to ASTM and K-ratings in that they are a measurement of protection against higher speed vehicles (30, 40 or 50 mph). A PAS68 rating looks like a math formula from high school: V/7500 [N1]/48/90:0/0 – it might look a bit daunting so let’s break it down.

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V stands for Vehicle test

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3,500(N2) = weight and vehicle type

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48 = speed (48 kph or 29.83 mph)

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90 = angle of impact

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0 = penetration distance

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0 = how far major debris traveled after impact

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For more information about ratings and a deeper dive into PAS68.

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Custom Vehicle Barrier Fences

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Whether because of a heightened danger from a Hostile Vehicle Attack or the premises stores expensive goods, volatile materials or data-sensitive information, a crash-rated, high security fence is a critical asset for any business or company that requires high-security perimeter protection. Protogetic offers top of the line systems from the most reputable manufacturers. Many of these products can be customized to meet your project’s specific design requirements. To instantly find the best vehicle barrier fence for your project, like Gibraltar’s G Force fence, click here to use our proprietary fence filter that allows you to research by manufacturer, anti-ram rating and infill material to name a few.

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Protogetic Offers Premier Vehicle Barrier Fences

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Protogetic’s exclusive high security, anti-ram fence catalog can supply you with a vehicle barrier fence, beam fence or other security barricades tailored to your project’s security requirements. We also offer the highest quality vehicle barrier gates to pair with your high-security fence perimeter specifications.

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Set up your user account now with a simple email address and get instantaneous, direct access to the world’s leading high security products. Technical specs and information as well as anti-ram certifications are all viewable and downloadable as PDFs. Click one button and you can directly receive real time information and pricing from the manufacturer’s vendor representatives. Finding anti-ram fencing and high-security vehicle barrier products has never been faster or easier. Visit Protogetic today!

"}, {"category": "climb-resistant", "text": "

Anti Climb Fences

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What is an anti climb fence?

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An anti climb fence, sometimes called anti climb security fencing or anti scale fencing, is precisely what it is named – a fence you cannot climb. These security fences prevent Intruders from achieving grip and footholds by employing tightly spaced welded wire, wire mesh, expanded metal, perforated metal and/or narrowly spaced palisades as the infill material between posts and rails. This design creates an unclimbable fence or unscalable fence.

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Some anti climb fences are designed with an outward curved top section that creates an impossible angle to overcome. Several anti climb palisade fences use this outward curve atop the fence along with a pointed spear-like end to further deter intruders. Many of these fence systems also offer additional security options like Concertina razor wire and barbed wire as well as motion detectors and security lighting.

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What is the difference between welded wire and wire mesh?

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Welded wire is professionally referred to as “welded wire mesh” and this inclusion of the term “mesh” is where confusion begins. Welded wire consists of perpendicular or orthogonal steel wires that are connected at their cross sections/intersections using resistance welding (or electric resistance welding). This process uses a strong electric current to heat up the two metal components until they melt at their resistance points (where the wires intersect) whereupon pressure is applied to forge them together. This forms a very strong grid of openings, or apertures, that can be sized according to need and design. When welded wire is used for anti climb fencing, the apertures are extremely tight or small to prevent foot and hand holds as well as protect against compromise by breaching tools.

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Woven wire mesh, often shortened to “wire mesh”, adds to the aforementioned confusion since both materials can be called “mesh”. Wire mesh is made from individual steel wires literally woven like cloth into an interlocking pattern. Generally, depending on the gauge (thickness) of the wire, woven wire mesh is more flexible and less resilient than welded wire.

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What is expanded metal and perforated metal infill?

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Expanded metal is a process where small cuts are made in a sheet of metal and then the entire piece is stretched (expanded) making larger, pre-determined apertures. Like welded wire, these small apertures prevent scaling and breaching.

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Perforated metal is a similar process in that the metal sheet has shapes (holes) punched out in various patterns and sizes.

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Are palisade fences anti climb fences?

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Many palisade fences are anti climb fences depending on how close together the “pales” are spaced. Pales are similar to pickets, the vertical bars or square tubes one often sees on wrought iron fences. Pales, however, are much stronger because they are made from roll formed steel and attached directly to the strength of the horizontal fence materials.

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Originally, palisade fences were made of wood and were called stake fences because the pales were imbedded in the ground. A perfect example of this is the stockade forts of the old US West that used sharpened logs buried vertically in the ground to create a palisade fence.

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Today’s modern steel palisade fences incorporate horizontal rails to affix the pales so they are not buried in the ground as an anchor point. You can find the best palisade, anti climb fences instantly using the Protogetic Filter.

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Where are anti climb fences used most?

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While there are consumer rated anti climb fences suitable for residential properties, more typically one encounters this level of security at high value target locations such as nuclear and electrical power plants, airports, chemical and petroleum storage facilities and military installations. A no climb security fence not only keeps intruders out, but it also can keep people within their required confines like prisons and psychiatric facilities as well as bridges and overpasses at risk for accidents or suicide attempts.

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Are anti climb fences the same as anti-ram fences?

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In short, no. A security anti climb fence is not necessarily designed to prevent a Hostile Vehicle Attack (HVA). However, some manufacturers do make anti-scale fencing that is anti-ram. These types of perimeter fencing have to be tested just like anti-ram vehicle barriers using ASTM F2656 criteria. You can find one of these special fences instantly at Protogetic.com.

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What are the advantages of an anti climb fence?

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An anti climb security fence prevents human compromise of the protected perimeter. The very small aperture of the infill material prevents scaling by eliminating hand and foot holds. These infill materials are typically steel and include: palisades, welded wire mesh, expanded metal and perforated metal. They are extremely robust so they can further slow or even thwart attempts to cut or breach the fence itself. This also makes most anti climb fences penetration resistant, sometimes simply called an anti-cut fence.

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Are all anti climb fences penetration resistant?

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Not at all but many are because penetration resistant fencing can be achieved by creating a very small aperture in the infill material – in lay terms, this means the spacing of the mesh or welded wire is so small that it prevents tools from fitting in the openings and thus cannot exert any leverage or bite to cut the wire infill. As such, it also prevents climbing. Some of these infill systems have such small apertures that they even limit or completely screen visibility should complete privacy be required.

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What other security options are available for an anti scale fence?

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Many anti scale fences are also customizable in their sizing as well as security options which include, spike toppers, Concertina razor wire, barbed wire, ballistic shield, motion detectors, infrared sensors and security lighting.

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How high is an anti-climb fence?

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Anti climb fence heights, like regular residential fencing, vary by location and security levels. Research indicates that security fencing should be no lower than 2.1 meters or 6’ 10 inches high. Quite obviously, the higher the fence – the more difficult it is to climb. Exactly how tall your fence needs to be to provide optimal security is also a function of budget as well as building and zoning codes. Many anti climb fences can be custom made or come in predetermined panel heights ranging from 8 feet to 20 feet. The Protogetic Filter helps you find the right height fence for your project instantly.

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What materials are used in anti climb fencing?

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Most commonly, an anti scaling fence is made from steel, galvanized steel or stainless steel. This includes the vertical fence posts and the horizontal rails. The infill material, whether welded wire, wire mesh, perforated metal, expanded metal or palisades, is also usually steel though they can be made of aluminum, copper, brass and titanium.

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Are all non climbable fences metal?

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There are unclimbable fence types that are non metallic and thus non conductive. These security fences are made of special fiberglass composites or fiberglass reinforced polymers. Installing a non conductive, non climbable fence is critical when securing unique locations like power generating facilities and sub stations where some metal fences could accommodate current leakage and flashover voltage (where a high voltage electric current is accidentally discharged) thereby creating a dangerous, if not deadly, result. If your needs require a metal anti climb fence to surround a sub station or power plant, you need to make sure it complies with the Institute of Electrical and Electronic Engineers (IEEE) grounding standards.

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A non-conductive fence is also best installed where radar is active, like airports. A metal, non climbable fence can reflect radar, creating more interference patterns compared to a non-conductive fence. Tired of searching? You can instantly find an anti climb, non-conductive fence using the Protogetic Filter for free!

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Are anti climb fences expensive?

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An anti climb fence utilizes infill material that is stronger, tighter spaced and less flexible than a chain link fence. More material that is higher quality of course costs more. Some anti climb security fencing relies on engineering to curve the upper portion of the fence outward as well as make connections and hardware inaccessible to cutting or being used as a foot or hand hold. These added security designs also add to the cost, making a no climb security fence more expensive than traditional chain link or picket fencing. At Protogetic.com, you can inquire about price quotes instantly by directly messaging the manufacturer representative with one easy click. It could not be simpler.

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