NCJ Number
18122
Date Published
1974
Length
191 pages
Annotation
DESCRIPTION AND RESULTS OF TESTS TO DETERMINE THE RESISTANCE OF VARIOUS STRUCTURAL BARRIER PANELS AND WIRE-MESH SECURITY FENCES TO FORCIBLE PENETRATION.
Abstract
SIXTEEN STRUCTURAL BARRIER PANELS WERE TESTED TO DETERMINE THEIR RESISTANCE TO FORCIBLE PENETRATION THROUGH THE USE OF READILY AVAILABLE TOOLING. THIRTEEN OF THESE REPRESENTED EXPERIMENTAL TECHNIQUES TO REINFORCE AN EXISTING STRUCTURAL BARRIER OF LOW PENETRATION RESISTANCE; THE OTHER THREE WERE DESIGNS WHICH WOULD BE MOST APPROPRIATE TO CONSIDER AS REPLACEMENT BARRIERS. MINIMUM MAN-PASSABLE SIZED OPENINGS WERE MADE IN THE BARRIERS IN WORKING TIMES WHICH AVERAGED 7.85 MINUTES AND RANGED FROM 1.52 TO 25.56 MINUTES. ONE OF THE REPLACEMENT AND TWO OF THE REINFORCING DESIGNS SHOWED SUPERIOR COSTEFFECTIVENESS. SEVEN WOVEN, WIRE-MESH SECURITY FENCE SPECIMENS WERE ALSO TESTED FOR THEIR INTRUSION DETERRENCE CAPABILITY. THE TEST RESULTS INDICATE THAT THE DETERRENT INFLUENCE OF UNELECTRIFIED FENCES OF THE TYPE TESTED IS LARGELY PSYCHOLOGICAL RATHER THAN PHYSICAL. ALL OF THE SPECIMENS COULD BE PENETRATED IN 0.14 MINUTES OR LESS. SAMPLES OF THE ACOUSTICAL AND VIBRATIONAL DATA PRODUCED DURING THE PENETRATION TESTS ADD TO THE GROWING BODY OF DATA WHICH ARE EXPECTED TO BE USEFUL IN THE DESIGN AND SELECTION OF ELECTRONIC INTRUSION ALARM EQUIPMENTS. (AUTHOR ABSTRACT)