Decorative Force Protection Barriers
Protection against security and terrorists threats is an important consideration in today’s world. Stonewear’s anti-ram force protection barriers provide outstanding protection against vehicular attack without sacrificing the aesthetic appearance of your site.
Stonewear offers a wide line of vehicle barriers, including planter barriers, impaler barriers, mil-spec planters, and 8" Sch 80 pipe with bollard covers. Models are available to meet any threat level and any budget. Once the level of agression anticipated by threat personell is known the appropriate barrier. Stonewear has you protected ...and still looking good!
U.S. Department of State Barrier Specifications
In an effort to protect U. S. Diplomatic and Consular Missions overseas, the Department of State set up specification for vehicle barriers. Many of Stonewear's ATFP barrier models match the tested design specs, but provide a decorative outer shell. The most popular specification is the DOS K-4 standard, which is 15,000 lbs moving at 50 mph.
How Stonewear Barriers Work
Large amounts of kinetic energy must be dissipated when a moving vehicle impacts a relatively immovable object like a barrier. The speed is important because it is multiplied by itself and the weight of the vehicle to calculate the kinetic energy that must be overcome. (KE = ½MV2)
This resistance of the barrier is the result of the strength to resist the impact multiplied by the duration of the impact. For example, a pile of hay can slow a speeding vehicle to a stop over time as does a massive concrete wall instantaneously. In this way, designs that create a progressive impact by virtue of the three dimensional shape are more effective for their mass than a conventional flat concrete wall. This also explains why a planter barrier with thinner walls and smaller foundation is more effective than a massive flat retaining wall with thicker walls, heavier rebar, and deeper foundations.
GFRC is the ideal material to take advantage of these facts of the physics of collision because of the ease of creating 3-D shapes that are also pre-finished and can be shipped to the job-site economically because of their light-weight construction.