1、Designation:F278115Standard Practice forTesting Forced Entry,Ballistic and Low Impact Resistanceof Security Fence Systems1This standard is issued under the fixed designation F2781;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the y
2、ear of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The forced entry resistance of fence systems is evalu-ated relative to three levels of forced entry threat using the
3、limited hand tool inventory outlined in Table 1.It alsoestablishes a system for rating the forced entry resistance ofthose systems(see Table 2).The tools specified to be used fortesting at each threat level are those that are known to have amaximum destructive effect on structures and their sub-asse
4、mblies and are readily available to aggressors categorizedas posing that level of threat.1.1.1 Low Threat Level(L)Specifically exempted from theinventory of available tools for the low(L)threat levelcategory are power tools(gasoline,electric or hydraulic),anddevices requiring more than one person to
5、 transport andoperate.1.1.2 Medium Threat Level(M)Specifically exemptedfrom the inventory of available tools for the medium(M)threatlevel category are power tools requiring an outside powersource or self contained gasoline or battery driven tools anddevices requiring more than two persons to transpo
6、rt andoperate.1.1.3 Aggressive Threat Level(A)Specifically exemptedfrom the inventory of available tools for the high(H)threatlevel category are devices requiring more than two persons totransport and operate.1.2 The ability of a fence system to offer protection frombullets fired from a rifle or han
7、dgun would be beneficialparticularly in Border Fence areas where security personnelcan be targets during patrol activities.Accordingly,a limitedtest using a.38 Special handgun and a 7.62-mm rifle isperformed to determine if any level of protection is providedby the fence system.1.3 The ability of a
8、fence system to provide impact resis-tance from a 4000 pound mass vehicle moving at a velocity of20 MPH at a modest cost will provide relative guidance as tothe strength of a security fence system in resisting low impactsituations.2.Referenced Documents2.1 ASTM Standards:2F1233 Test Method for Secur
9、ity Glazing Materials AndSystems2.2 SAE Standard:3SAE J972 Moving Rigid Barrier Collision Tests2.3 U.S.Military Standards:4MIL-STD-662F Department of Defense Test Method Stan-dard V50 Ballistic Test for Armor2.4 U.S.Dept.of Justice:5NIJ Standard 0108.01 National Institute of Justice BallisticResista
10、nt Protective Materials3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 test directorthe individual identified by the indepen-dent testing laboratory as being responsible to complete thespecified tests and to document the results.3.1.2 forced entrycreating a four square feet ope
11、ning.4.Summary of Practice4.1 For each rating a structured portion and a discretionaryportion as described in 4.2 and 4.3 is required.4.2 The structured portion of the test provides for a zero tofive minute test with specific tools selected as the mostdebilitating from the tool list in Table 1,regar
12、dless of the fencesystem being tested.1This practice is under the jurisdiction of ASTM Committee F14 on Fences andis the direct responsibility of Subcommittee F14.50 on High Security Fences andPerimeter Barriers.Current edition approved Nov.1,2015.Published December 2015.Originallyapproved in 2009.L
13、ast previous edition approved in 2010 as F2781-10.DOI:10.1520/F2781-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM web
14、site.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.5Available from National Institute of Justice(NIJ),810 7th
15、 St.,NW,Washington,DC 20531,http:/nij.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.3 Following the structured portion of the test,the discre-tionary portion of the test provides up to 55 minutes of testing,optimizing forced entry
16、 efforts by selecting any(or all)toolsfrom the applicable category of the list(low(A),medium(B),or aggressive(C).Selection of tools is based on the perceptionof the test director as to which tools will most effectively resultin a forced entry.4.4 Testing of security fence systems in accordance with therequirements of this test method shall result in a ratingreflecting the severity of the threat and the cumulative penetra-tion resistance time(see Table 2).4.5 The times used to establish the prote