Industry News




 

10/25/2011

Vehicle Risk Assessment & Physics 101

By David David Dickinson, Delta Scientific

 
Vehicle-Risk-Assessment
 

When evaluating the security risk for a car bomber or crasher for a given facility, focus on the weights and velocities of vehicles that could be used to attempt penetration into sensitive areas. 

A vehicle moving towards a barricade has a certain kinetic energy, the major measure of how much "hitting power" it possesses.  Mathematically, kinetic energy is derived from the vehicle velocity and its weight (mass).  On impact, some energy is converted to heat, sound and permanent deformation of the vehicle.  To stop the vehicle, the barricade must absorb the remainder. 

The remaining energy varies depends primarily on the velocity of the vehicle at the moment of impact.  The amount of kinetic energy possessed by a vehicle changes by the square of its velocity.  A vehicle moving at 50 mph has 25 times as much kinetic energy as at 10 mph.  An armored car weighing 30 times as much as a Toyota moving at 10 mph has less hitting power than the Toyota moving at 60 mph!

Because of the relationship of velocity to the total kinetic energy, every effort must be made by the security engineer to force a vehicle to slow down before it reaches the barricade.  The most frequently used technique is to require a sharp turn immediately in front of the barrier.  When vehicle speed is reduced by 50 percent, "hitting power" is reduced four times.  If the speed is reduced 2/3rds, the force of impact is reduced nine times.

 Upon designing a way to slow down vehicle approach, precautions should also be taken that the attacking car cannot make a "corner cutting shot" at a barricade.  Often, only a light post defines a turning point and a speeding car can take it out and not even hesitate.  Knolls and other impediments should be considered. Failing to understand this and not using the proper equipment to counter threats leads to a false sense of security.


 


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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

 


 
09/19/2014

New regulations from the DOE would improve commercial air conditioner efficiency by as much as 30%. 

09/18/2014

A new study suggests that the installed cost of photovoltaic solar power continues to drop in the U.S.

09/17/2014

A new technology developed at Rice University effectively deices glass surfaces while remaining transparent for radio frequency transmission.

09/16/2014

The USGBC and American Chemistry Council have put aside their differences to work together on new improvements to the LEED certification system. 

09/15/2014

Researchers have developed a new process to help cloud computing systems use less energy while continuing to provide high levels of data services.

09/12/2014

Researchers have found the main factors that influence the amount and type of building damage caused by various types of salts. 

09/11/2014

A new study has demonstrated that proactive ergonomic training can decrease worker discomfort and increase productivity. 

09/10/2014

The University of Utah has upgraded its historic Dumke Health Professions Education building to save an impressive 40% on energy costs.

09/09/2014

Hoping to build on LEED's success, PEER evaulates the performance and modernization of electric grids. 

09/08/2014

The USGBC has developed a new tool to help streamline the LEED certification process. 

09/05/2014

Researchers have developed a fluorescent lamp that emits Wi-Fi signals to allow connectivity throughout buildings.

09/04/2014

Tests show effective measures for reducing earthquake damage to computer servers. 

09/03/2014

Health costs drop by half as a result of environmental regulations.

09/02/2014

A new study challenges the idea that sparse workplaces produce happier, more productive employees.

08/29/2014

New tool from FEMA helps facility managers prepare for and mitigate the effects of nonstructural earthquake damage. 

08/28/2014

Is your building's exterior prepared for consistent snowstorms?

08/27/2014

Researchers have developed wearable, customizable technology to handle access control at busy hotels. 

08/26/2014

A new study shows that hotels which are LEED certified bring in more revenue than their non-certified competitors. 

08/25/2014

Policies designed to reduce carbon emissions have the added benefit of increasing air quality, which could pay for the reduction policies themselves. 

08/22/2014

Researchers at Michigan State University have developed a luminescent solar concentrator that is as transparent as glass. 

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