ASTM F2421-05
(Test Method)Standard Test Method for Measurement of Resilient Floor Plank by Dial Gage
Standard Test Method for Measurement of Resilient Floor Plank by Dial Gage
SIGNIFICANCE AND USE
The combination of both dimensional and squareness of resilient floor plank is an important consideration because installed flooring may exhibit an objectionable appearance when either or both characteristics deviate from established tolerances. This test method provides a means of determining actual dimensional and squareness by using a single apparatus and procedure.
SCOPE
1.1 This test method establishes the procedures for determination of both dimension (length and width) and squareness of resilient floor plank. This test method is intended for use with rectangular plank up to 36 in. (915 mm).
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are provided in applicable sections of this test method.
1.2 The values stated in inch-pounds units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation:F2421–05
Standard Test Method for
Measurement of Resilient Floor Plank by Dial Gage
This standard is issued under the fixed designation F2421; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope tolerances. This test method provides a means of determining
actual dimensional and squareness by using a single apparatus
1.1 This test method establishes the procedures for determi-
and procedure.
nation of both dimension (length and width) and squareness of
resilient floor plank. This test method is intended for use with
5. Apparatus
rectangular plank up to 36 in. (915 mm).
5.1 The apparatus shall consist of five dial gages and two
1.2 This standard does not purport to address all of the
reference index strips mounted on a flat bedplate in a configu-
safety concerns, if any, associated with its use. It is the
ration that, by rotation and flipping of the sample, allows the
responsibility of the user of this standard to establish appro-
measurement of all four sides of resilient plank samples. (See
priate safety and health practices and determine the applica-
Fig. 1). One edge of the bedplate is elevated to create a test
bility of regulatory limitations prior to use. Specific precau-
surface, which is offset or tilted 15+/-1 degrees from horizon-
tionary statements are provided in applicable sections of this
tal. The offset applies minimal pressure to the test specimen
test method.
against the longer index strip to ensure repeatable measure-
1.3 The values stated in inch-pounds units are to be re-
ment. A reference plate representing target plank size and
garded as the standard. The values given in parentheses are for
squareness (see Fig. 2) is used to zero all dial gages.
information only.
5.2 Dial Gages—The five dial gages are mounted in guide
2. Referenced Documents slots, which are machined into the bedplate to allow for
measurement of various plank sizes. For the two corner gages
2.1 ASTM Standards:
(B & D) and the squareness gage (A) the position must be at
F141 Terminology Relating to Resilient Floor Coverings
least within 10 % of the corner edge relative to the respective
2.2 ANSI Standards:
length and width of the plank. For the center gages (C & E) the
ANSI/ASQC Z1.4-1993 Sampling Procedures and Tables
position must be at least within 10 % of the centerline relative
for Inspection by Attributes
to the respective length and width of the plank.Any dial gages
3. Terminology may report measurements using either electrical or mechanical
means, but shall be graduated to read to the 0.001 in. (0.025
3.1 Definitions: For definitions of terms used in this test
mm)andhaveastemtravelgreaterthan0.25in.(6.4mm).The
method, refer to Terminology F141.
contact foot of the dial-gage stem shall be flat, 0.50 to 0.75 6
4. Significance and Use
0.001 in. (12.7-19.1 mm 6 0.025 mm) in diameter and exert a
total force of not more than 3.0 6 0.1ozf (0.83 6 0.003 N).
4.1 The combination of both dimensional and squareness of
Dial gages shall be positioned securely so that when the
resilient floor plank is an important consideration because
reference plate is in place, the contact foot is extended
installed flooring may exhibit an objectionable appearance
approximately 50 % of its full travel.
when either or both characteristics deviate from established
5.3 Index Strips—The apparatus contains two fixed index
strips.Ahorizontal index strip shall be mounted parallel to and
just inside the lower edge of the bedplate. It shall be 1.5 6 0.1
This test method is under jurisdiction of ASTM F06 Committee on Resilient
in. (38 6 3 mm) greater in length and a minimum of twice the
Floor Coverings and is the direct responsibility of subcommittee F06.20 on Test
Methods–Product Construction/Materials thickness of the largest plank to be tested.Asecond strip shall
Current edition approved March 1, 2005. Published April 2005. DOI: 10.1520/
be mounted 90 degrees 6 10 s (1.57080 6 0.00005 rad.) to the
F2421-05.
horizontalindexstrip.Thelowerendofthisindexstripshallbe
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
0.15 6 0.01 in. (3.1 6 0.25 mm) above the left end of the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
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F2421–05
FIG. 1 Plank Measurement Apparatus
FIG. 2 Reference Plate
horizontal index strip and is used to locate one corner of the shall be expressed in units. A unit represents a single, manu-
sample plank (see Fig. 1). factured, inventoried, finished plank.
5.4 Reference Plate—The reference pla
...
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