1、Designation: F2421 05 (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
2、 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 This test method establishes the procedures for determi-nation of both dimension (length and width) and squareness of
3、resilient floor 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 c
4、onsidered 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
5、use. Specific precau-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
6、to Resilient Floor Coverings2.2 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
7、squareness ofresilient floor 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 singl
8、e apparatusand procedure.5. 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
9、 of the bedplate is elevated to create 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 (s
10、ee Fig. 2) is used to zero all dial gages.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 or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Typical Measurement DataRotation Gage A Gage B Gage C Gage D Gage EFirst set 1Rotation 1 2Flip 1 3Rotation 2 4F2421 05 (2011)3
