1、Designation:F242105(Reapproved 2011)Standard Test Method forMeasurement of Resilient Floor Plank by Dial Gage1This standard is issued under the fixed designation F2421;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 This test method establishes the procedures for determi-nation of both dimension(length and width)and squareness ofresilient flo
3、or plank.This test method is intended for use withrectangular plank up to 36 in.(915 mm).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 standa
4、rd.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.Specific precau
5、-tionary statements are provided in applicable sections of thistest method.1.4 The values stated in inch-pounds units are to be re-garded as the standard.The values given in parentheses are forinformation only.2.Referenced Documents2.1 ASTM Standards:2F141 Terminology Relating to Resilient Floor Cov
6、erings2.2 ANSI Standards:3ANSI/ASQC Z1.4-1993 Sampling Procedures and Tablesfor Inspection by Attributes3.Terminology3.1 Definitions:For definitions of terms used in this testmethod,refer to Terminology F141.4.Significance and Use4.1 The combination of both dimensional and squareness ofresilient flo
7、or plank is an important consideration becauseinstalled flooring may exhibit an objectionable appearancewhen either or both characteristics deviate from establishedtolerances.This test method provides a means of determiningactual dimensional and squareness by using a single apparatusand procedure.5.
8、Apparatus5.1 The apparatus4shall consist of five dial gages and tworeference index strips mounted on a flat bedplate in a configu-ration that,by rotation and flipping of the sample,allows themeasurement of all four sides of resilient plank samples.(SeeFig.1).One edge of the bedplate is elevated to c
9、reate a testsurface,which is offset or tilted 15+/-1 degrees from horizon-tal.The offset applies minimal pressure to the test specimenagainst the longer index strip to ensure repeatable measure-ment.A reference plate4representing target plank size andsquareness(see Fig.2)is used to zero all dial gag
10、es.5.2 Dial GagesThe five dial gages are mounted in guideslots,which are machined into the bedplate to allow formeasurement of various plank sizes.For the two corner gages(B&D)and the squareness gage(A)the position must be atleast within 10%of the corner edge relative to the respectivelength and wid
11、th of the plank.For the center gages(C&E)theposition must be at least within 10%of the centerline relativeto the respective length and width of the plank.Any dial gagesmay report measurements using either electrical or mechanicalmeans,but shall be graduated to read to the 0.001 in.(0.025mm)and have
12、a stem travel greater than 0.25 in.(6.4 mm).Thecontact foot of the dial-gage stem shall be flat,0.50 to 0.75 60.001 in.(12.7-19.1 mm 6 0.025 mm)in diameter and exert atotal force of not more than 3.0 6 0.1ozf(0.83 6 0.003 N).Dial gages shall be positioned securely so that when thereference plate is
13、in place,the contact foot is extendedapproximately 50%of its full travel.5.3 Index StripsThe apparatus contains two fixed indexstrips.A horizontal index strip shall be mounted parallel to andjust inside the lower edge of the bedplate.It shall be 1.5 6 0.11This test method is under jurisdiction of AS
14、TM F06 Committee on ResilientFloor Coverings and is the direct responsibility of subcommittee F06.20 on TestMethods-Products Construction/MaterialsCurrent edition approved Nov.1,2011.Published November 2011.Originallyapproved in 2005.Last previous edition approved in 2005 as F242105.DOI:10.1520/F242
15、1-05R11.2For 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.3Available from American National Standards Institute,25 W
16、est 43rd St.,NewYork,NY 10036.4Available from Frazier Precision Instrument Company,Inc.,925 N SweeneyDrive,Hagerstown,MD,21740,USA.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 in.(38 6 3 mm)greater in length and a minimum of twice thethickness of the largest plank to be tested.A second strip shallbe mounted 90 degrees 6 10 s(1.57080 6 0.00005 rad.)to thehorizontal index strip.The lower end of this index strip shall be0.15 6 0.01 in
