1、Designation:F205510Standard Test Method forSize and Squareness of Resilient Floor Tile by Dial GageMethod1This standard is issued under the fixed designation F2055;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.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 This test method covers the determination of bothdimensions(length and width)and squareness of resilient floortile.This test method
3、is intended for use with square tilesranging from a nominal 9 in.(226 mm)to 40 in.(1016 mm)indimension.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 con
4、sidered 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
5、.Referenced Documents2.1 ASTM Standards:2E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Significance and Use3.1 Both dimension and squareness of resilient floor tile areimporta
6、nt considerations,because installed flooring may ex-hibit an objectionable appearance when either or both charac-teristics deviate from established tolerances.This test methodprovides a means of determining actual dimensions and square-ness by using a single apparatus and procedure.4.Apparatus4.1 Th
7、e apparatus shall consist of four dial gages and tworeference index strips mounted on a flat bedplate in a configu-ration that,by rotation of the sample,allows the measurementof all four sides of resilient tile samples(see Fig.1).One edgeof the bedplate is elevated to create a test surface which iso
8、ffset or tilted 15 6 1 degrees from horizontal.This offsetapplies minimal pressure to the test specimen against thelonger index strip to ensure repeatable measurement.A refer-ence plate representing target tile size and squareness is used tozero all dial gages(see Fig.2).4.2 Dial GagesThe four dial
9、gages are mounted in guideslots that are machined into the bedplate to allow for measure-ment of various tile sizes while remaining within 10%of thecorner of the tile edge(for the two corner gages and onesquareness gage)or within the central 10%of the tile edge(forthe center gage only).Dial gages ma
10、y report measurementsusing either electrical or mechanical means,but they shall begraduated to read 0.001 in.(0.02 mm)and have a stem travelgreater than 0.25 in.(6 mm).The contact foot of the dial-gagestem shall be flat 0.500.75 6 0.001 in.(12.719.1 mm 6 0.2mm)in diameter and exert a total force of
11、not more than 3.0 60.1 ozf(0.83 6 0.003 N).Dial gages shall be securelypositioned so that when the reference plate is in place,thecontact foot is extended approximately 50%of its full travel.4.3 Index StripsThe apparatus contains 2 fixed indexstrips.A horizontal index strip shall be mounted parallel
12、 to andjust inside the lower edge of the bedplate.It shall be 1.5 6 0.1in.(38 6 3 mm)greater in length and a minimum of twice thethickness of the largest tile to be tested.A second index stripshall be mounted 90 6 10 s(1.57080 6 0.00005 rad.)to thehorizontal index strip.The lower end of this index s
13、trip shall be0.125 6 0.01 in.(3.1 6 0.25 mm)above the right end of thehorizontal index strip and is used to locate one corner of thesample tile.4.4 Reference PlateThe reference plate shall be made tothe target dimensions of the manufactured tile.The length andwidth dimensions shall be within 6 0.001
14、 in.(0.02 mm)of thespecified dimensions of the resilient tile.The reference plateshall contain at least two sides which are perpendicular to 901This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of F06.20Test Methods-ProductsC
15、onstruction/Materials.Current edition approved Nov.1,2010.Published November 2010.Originallyapproved in 2000.Last previous edition approved in 2009 as F2055-09.DOI:10.1520/F2055-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.F
16、or 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 6 10 s(1.57080 6 0.00005 rad.)to one another and are usedto set the squareness gage to zero.5.Specimens5.1 The specimens shall consist of 5 full size tiles.6.Conditioning6.1 Condition the test specimens,reference plate,and appa-ratus a minimum of 24 h at 73.4 6 1.8F(23 6 1C)
