ASTM_F_2656_-_F_2656M_-_15.pdf

Designation:F2656/F2656M15Standard Test Method forCrash Testing of Vehicle Security Barriers1This standard is issued under the fixed designation F2656/F2656M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONOriginal perimeter barrier test methods were first published in 1985 by the Bureau of DiplomaticSecurity to assess the crash performance of perimeter barriers and gates.Since that time,the frequencyand scale of attacks using vehicles with or without an explosive payload have increased bothinternationally and domestically.Therefore,there is a need to address a broad spectrum of possibleincident conditions such as credible threat vehicle types for the locale,attack velocities of the differentvehicles,and different acceptable penetration limitations.Also,there are different evaluation criteriafor different agencies that fulfill their unique access control operations,aesthetics,and otherorganizational requirements.This test method was originally developed to expand the previousDepartment of State,Bureau of Diplomatic Securitys crash testing standard to meet the broader needsof multiple organizations responsible for the protection of U.S.assets domestically and abroad.Published test standards for vehicle perimeter security devices have previously been maintained bythe U.S.State Department,Bureau of Diplomatic Security.The Specification for Vehicle Crash Testof Perimeter Barriers and Gates was first published in 1985 as SD-STD-02.01.In that standard,the testvehicle was specified as a medium-duty truck weighing 6800 kg 15 000 lb.The payload was to besecurely attached to the frame and nominal impact velocities were 50,65,and 80 km/h 30,40,and50 mph.Penetration limits were 1,6,and 15 m 3,20,and 50 ft and were measured from the attackface of the perimeter security device to the final resting position of the front of the frame rails of thetest vehicle.In 2003,the U.S.State Department,Bureau of Diplomatic Security issued an updated standard(SD-STD-02.01,Revision A)for the testing of perimeter barriers.This update was done for severalreasons.The foremost reason for change was limited setback distances precluded the use of anydevices at their facilities or compounds that did not meet the highest test level,that is,those allowingmore than 1-m 3-ft penetration distance.Therefore,the revised standard only uses a 1-m 3-ftpenetration distance.Secondly,the method of rigid attachment of the ballast to the test vehicle was notsimulating likely payload configurations and was altering the structural integrity of the test vehicle.Consequently,the updated standard requires a payload consisting of 208-L 55-gal steel drumsstrapped together that have been filled with soil.This assembly is then strapped to the vehicle loadplatform.The third reason for change was based on the observation that the cargo bed of trucks couldeffectively penetrate certain types of barriers.Accordingly,the penetration distance is now measuredfrom the inside face or non-impact surface of the barrier to the front of the cargo bed when the vehiclehas reached its final position.Lastly,it was determined that the trucks used different platforms withina given class affecting result consistency.The revised test standard required the use of very specificdiesel-powered medium-duty trucks.In 2007,ASTM first published Test Method F2656 for Vehicle Crash Testing of Perimeter Barriers.It included the same test vehicle as specified in the 2003 SD-STD-02.01,Revision A,but additionaltest vehicles were added.They were the small passenger car,a12-ton regular cab pickup,and a tandemaxle dump truck.In addition,penetration ratings were reestablished and included the highest ratingestablished by the 2003 SD-STD-02.01.Occupant risk values as established in NCHRP Report 350were also added.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 This latest version of Test Method F2656 incorporates two additional vehicles,the large passengersedan and a Class 7 cab-over with a single rear axle.Additionally,the small car and pickup have beenupdated to match the latest AASHTO Manual for Assessing Safety Hardware(MASH),the update toNCHRP Report 350.Class 7 cab-over is compatible with European standards and is designated C7.Additional definitions and recommendations have also been added and the word“perimeter”has beendeleted from the title to reflect more accurately all barriers tested under this test method.Since it wasdetermined that the P4 rating did not have substantial relevance,this rating has been eliminated.Tokeep up with current terminology,the term“reduced risk”is discussed in this version of Test MethodF2656.1.Scope1.1 This test method provides a range of vehicle impactcon