ASTM_F_387_-_11.pdf

Designation:F38711Standard Test Method forMeasuring Thickness of Resilient Floor Covering With FoamLayer1This standard is issued under the fixed designation F387;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers the determination of the thick-ness of resilient non-textile floor coverings containing a foamlayer as part of the construction.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Significance and Use3.1 The overall thickness or caliper of resilient flooring is abasic physical property.However,conventional means ofmeasuring the thickness,such as a hand micrometer or regulardial micrometer,are not applicable for foam-layer products dueto the error from compressing the foam.This test methodminimizes this type of measuring error and still retains theconvenience and speed of measurement.3.2 Measurement of the product thickness may be requiredfor quality control purposes or to ensure compliance withapplicable specifications.4.Apparatus4.1 The apparatus shall consist of a comparator stand havinga flat anvil base at least 6 in.(15 cm)square,equipped with athickness gage graduated to 0.001 in.(0.02 mm).The gageshall be equipped with a flat presser foot 0.250 6 0.01 in.(6.356 0.5 mm)in diameter.The foot shall exert a force of 1 6 0.1ozf(0.28 6 0.03 N)maximum.4.1.1 The contact surfaces of the anvil and thickness gagepresser foot shall be parallel within 0.0001 in.(0.003 mm).5.Test Specimen5.1 The specimen shall be approximately 2 by 4 in.(50 by100 mm).6.Calibration6.1 Calibrate the gage by means of gage blocks or shimstock of known thickness appropriate to the thickness of thematerial being measured.7.Conditioning7.1 Condition the specimens at least 24 h at 73 6 3F(23 62C)and 50 6 5%relative humidity and test in the sameenvironment.8.Procedure8.1 Level the instrument.8.2 Clean the anvil and the presser foot surfaces.8.3 Zero the instrument by allowing the presser foot to reston the anvil.8.4 Select an unembossed flat area that is substantiallylarger,if possible,than the presser foot and at least 0.75 in.(19mm)from any edge of the specimen.8.5 Raise the presser foot and insert the test specimen withthe wearing surface down.8.6 Lower the foot slowly to rest on the specimen withoutimpacting it.1This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of Subcommittee F06.20 on TestMethods-Products Construction/Materials.Current edition approved March 15,2011.Published April 2011.Originallyapproved in 1973.Last previous edition approved in 2008 as F387 02(2008).DOI:10.1520/F0387-11.2For 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 website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.6.1 Hold the specimen flat taking precautions not tocompress it in the vicinity of the foot.8.7 Upon contact with the surface,take a reading from thegage to the nearest 0.001 in.(0.02 mm).Take all measurementsat least 0.75 in.(19 mm)from any edge of the specimen.8.8 Take five measurements per specimen distributed evenlyacross the length of the specimen unless otherwise specified.9.Calculation9.1 Calculate the average thickness of each specimen.10.Report10.1 Report the average thickness of each specimen to thenearest 0.001 in.(0.02 mm).10.2 Report the minimum and maximum thickness,or bothif required by specification.11.Precision and Bias11.1 The precision of this test method is based on aninter-laboratory study ofASTM F387-02(2008)Standard TestMethod for Measuring Thickness of Resilient Floor Coveringwith Foam Layer,conducted in 2009/2010.Each of fivelaboratories tested seven different flooring materials.Every“test result”represents the average of five individualdeterminations,and all participants reported triplicate testresults.Except f