1、Designation: F 2055 00 (Reapproved 2008)Standard Test Method forSize and Squareness of Resilient Floor Tile by Dial GageMethod1This standard is issued under the fixed designation F 2055; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of 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 covers the determination of bothdimensions (length and width) and squareness of resil
3、ient floortile. This test method 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 the standard. The values given in parentheses are forinformation only.1.3 This standard does not
4、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. Significance and Use2.1 Both dimension
5、and squareness of resilient floor tile areimportant 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
6、 a single apparatus and procedure.3. Apparatus3.1 The apparatus shall consist of four dial gages (refer-enced A through D in Fig. 1) and two reference index stripsmounted on a flat bedplate in a configuration that, by rotationof the sample, allows the measurement of all four sides ofresilient tile s
7、amples (see Fig. 1). One edge of the bedplate iselevated to create a test surface which is offset or tilted 15 61 degrees from horizontal. This offset applies minimal pressureto the test specimen against the longer index strip to ensurerepeatable measurement. A reference plate representing targettil
8、e size and squareness is used to zero all dial gages (see Fig.2).3.2 Dial GagesThe four dial 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 ones
9、quareness gage) or within the central 10% of the tile edge (forthe center gage only). Dial gages may 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
10、-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 not more than 3.0 61This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of F06.20 Test Methods - ProductsConstruction/Mat
11、erials.Current edition approved May 1, 2008. Published July 2008. Originally approvedin 2000. Last previous edition approved in 2000 as F 2055-00.FIG. 1 Tile Measurement ApparatusA: Tile Target Dimension 6 0.001 in. (0.02 mm)B: 90 6 10 s (1.57080 6 0.00005 rad.)FIG. 2 Reference Plate1Copyright ASTM
12、International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.0.1 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.3.3 Index StripsThe appar
13、atus contains 2 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 0.1in. (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
14、 6 10 s (1.57080 6 0.00005 rad.) to thehorizontal index strip. The lower end of this index strip 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.3.4 Reference PlateThe reference plate shall be made tothe tar
15、get dimensions of the manufactured tile. The length andwidth dimensions shall be within 6 0.001 in. (0.02 mm) of thespecified dimensions of the resilient tile. The reference plateshall contain at least two sides which are perpendicular to 906 10 s (1.57080 6 0.00005 rad.) to one another and are used
16、to set the squareness gage to zero.4. Specimens4.1 The specimens shall consist of 5 full size tiles.5. Conditioning5.1 Condition the test specimens, reference plate, and appa-ratus a minimum of 24 h at 73.4 6 1.8F (23 6 1C) and 506 5% relative humidity. Tests shall be conducted in this sameenvironme
17、nt. Samples shall be conditioned on a flat surfacesuch as a table or floor surface to ensure they will contact thebedplate uniformly during measurement.6. Procedure6.1 Place the appropriate reference plate onto the bedplatesurface and slide it firmly against the two index strips. Set eachof the four
18、 dial indicators to zero. Remove the reference plate.All dial indicators will now reflect their fully extended mea-surements. In the case of digital dial indicators, the display willindicate a negative number. In the case of mechanical dialindicators, the display will move counter-clockwise from zer
19、o.NOTE 1Dirt and foreign particles may collect along the upper face ofthe index strip and affect the zero setpoint. Use a small brush to maintainthe cleanliness of the index strip surfaces before and after each use.6.2 Measuring Size and SquarenessIdentify one edge ofthe sample tile as “Edge #1” by
20、attaching a label to the face ofthe tile near that edge. Place the tile into the apparatus andcarefully move it into position such that it will depress all fourdial gages and is in firm contact with both index strips. Recordthe measurements on all four gages to the nearest 0.001 in.(0.02 mm).6.3 Rem
21、ove the tile from the bedplate and rotate it 90 in theclockwise direction. Repeat the process described in 6.2 andrecord the four gage readings. Repeat for each of the tworemaining sides.6.4 After all samples have been measured, place the refer-ence gage back on the bedplate to verify that no moveme
22、nt ofdial gages has occurred. A movement of greater than 0.001 in.(0.02 mm) shall be cause to repeat the measurement process.7. Calculations7.1 Tile SizeRecord all measurements in the formatshown in Table 1. Measurements shall be recorded to thenearest 0.001 in. (0.02 mm) for all gages. The four rot
23、ationsprovide two measurements of the length and width at the centerand both edges of each of the tile specimens. Report thedimensions and squareness for each specimen using the for-mulas in 7.2.7.2 Perform the following calculations using Table 1 data todetermine length, width, and squareness devia
24、tions for thesample tile. The final report shall include tile size, test date, andlength, width, and squareness deviations.Length and Width Deviation Squareness DeviationLength Deviation, Left Side = (1A+3C)/2 Corner 1 = (D1)Length Deviation, Center = (1B+3B)/2 Corner 2 = (D2)Length Deviation, Right
25、 Side = (1C+3A)/2 Corner 3 = (D3)Width Deviation, Left Side = (2A+4C)/2 Corner 4 = (D4)Width Deviation, Center = (2B+4B)/2Width Deviation, Right Side = (2C+4A)/28. Report8.1 Report the dimensions and squareness for each speci-men using the formulas in 7.2.9. Precision and Bias9.1 PrecisionThe repeat
26、ability and reproducibility of thistest method is in the process of being established.9.2 BiasThe bias of this test method is in the process ofbeing established.10. Keywords10.1 dial gage; resilient flooring; resilient tile; tileTABLE 1 Typical Measurement DataRotation No. Gage A Gage B Gage C Gage
27、D1 0.002 0.003 0.002 0.0022 0.003 0.000 0.001 0.0033 0.004 0.001 0.003 0.0024 0.003 0.002 0.005 0.004F 2055 00 (2008)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly
28、 advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, ei
29、ther reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may atten
30、d. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 2055 00 (2008)3
