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.


 


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.

Add highly responsive multi-zone comfort to any building project, in any climate. Our CITY MULTI H2i R2- and Y-Series VRF systems give you flexibility to fit the needs of any building. Enjoy 100% heating capacity at 0°F outdoor ambient, and 85% heating capacity at -13°F outdoor ambient.  For more information, log on to www.mitsubishipro.com


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.

Add highly responsive multi-zone comfort to any building project, in any climate. Our CITY MULTI H2i R2- and Y-Series VRF systems give you flexibility to fit the needs of any building. Enjoy 100% heating capacity at 0°F outdoor ambient, and 85% heating capacity at -13°F outdoor ambient.  For more information, log on to www.mitsubishipro.com

 
12/19/2014

Agreement will improve sustainability in parking operations.

12/18/2014

Ruling aims to make U.S. photovoltaics more competitive.

12/17/2014

Tests show geothermal could cut costs up to 44%.

12/16/2014

New provisions added before end of session.

12/15/2014

Ultraviolet regimen can reduce incidence of dangerous viruses up to 20%.

12/12/2014

New design keeps heat from entering buildings.

12/11/2014

Provision covers new construction and retrofits.

12/10/2014

New rule will cut consumption by 15-20%.

12/09/2014

Recent rainfall not enough to offset groundwater losses.

12/08/2014

New technology allows record-high energy output.

12/05/2014

New “heat mirror” could revolutionize facility cooling.

12/04/2014

Education improves efficiency and employee happiness.

12/03/2014

Interactive building guide provides directions.

12/02/2014

Study shows walking at work can improve focus, mental health.

12/01/2014

Ruling would further limit smog emissions.

11/26/2014

Survey shows green initiatives pay off in hiring as well as energy.

11/25/2014

More executives choosing alternatives to LEED.

11/24/2014

EPA challenge to increase diversion rates for the holidays.

11/21/2014

Framework allows users a better look at roofing's environmental impact.

11/20/2014

Study finds paper towel dispensers carry far fewer germs.

Page 1 of 48
FirstPrevious[1]2345678910NextLast

Upcoming Webinars

Sponsored Links