ASTM F970-06
(Test Method)Standard Test Method for Static Load Limit
Standard Test Method for Static Load Limit
SCOPE
1.1 This test method is intended for use in determining the recovery properties of resilient floor covering after long-term indentation test, 24 h under the load specified in the detail specification. The reported value, residual indentation, is the depth of the depression remaining 24 h after removal of the specified load.
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.
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Designation:F 970–06
Standard Test Method for
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Static Load Limit
This standard is issued under the fixed designation F 970; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Apparatus
1.1 This test method is intended for use in determining the 4.1 The following apparatus shall be used:
recovery properties of resilient floor covering after long-term 4.2 Conditioning Room, providing the standard laboratory
indentation test, 24 h under the load specified in the detail atmosphere of 50 6 5 % relative humidity at a temperature of
specification. The reported value, residual indentation, is the 73.4 6 3.6°F (23 6 2.0°C).
depth of the depression remaining 24 h after removal of the 4.3 Armstrong Indentation Machine, heavy duty, as de-
specified load. scribed in 5.2 and pictured in Fig. 1 of Test Method F 1914.
1.2 This standard does not purport to address all of the 4.4 Indentor Plates, each constructed of a piece of 2-in.
safety concerns, if any, associated with its use. It is the (50.8 mm) square stainless steel, 0.240 6 0.005 in. (6.1 6 0.1
responsibility of the user of this standard to establish appro- mm) thick, with one side turned to 1.125 in. (28.6 mm) in
priate safety and health practices and determine the applica- diameter (one square inch area) to depth of 0.150 in. (3.8 mm)
bility of regulatory limitations prior to use. (see Fig. 1).
4.5 Dial Micrometer, as described in Test Method F 387,
2. Referenced Documents
consistingofacomparatorstandhavingaflatanvilbaseatleast
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2.1 ASTM Standards:
6 in. (15 cm) square, equipped with a thickness gauge
E 171 Specification for Atmospheres for Conditioning and graduated to 0.001 in. (0.02 mm). The gauge shall be equipped
Testing Flexible Barrier Materials
with a flat presser foot 0.250 6 0.01 in. (6.356 6 0.5 mm) in
E 691 Practice for Conducting an Interlaboratory Study to diameter. The foot shall exert a maximum force of 1 6 0.1 ozf
Determine the Precision of a Test Method
(0.28 6 0.03 N).
F 387 Test Method for Measuring Thickness of Resilient 4.6 Template of Poly(methyl Methacrylate) (PMMA), or of
Floor Covering With Foam Layer
other transparent material, 2 by 2 in. (50.8 by 50.8 mm) with
F 1914 Test Methods for Short-Term Indentation and Re-
round scratch line centered on the template that is 1.125 in.
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sidual Indentation of Resilient Floor Covering (28.58 mm) in diameter, defining the test area, and with a ⁄2 in.
(12.7 mm) diameter hole at the center of the template to draw
3. Significance and Use
a circle on the specimen where thickness will be measured.
3.1 Thistestmethodisameaningfultestfordeterminingthe
4.7 Die, 2 by 2 in. (50.8 by 50.8 mm) and press, papercutter,
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indentation recovery properties of resilient floor covering.
or equivalent to cut specimens to 2 by 2 in. size (50.8 by 50.8
mm).
4.8 Optional—Open box without spring clips for 2 by 2 in.
(50.8 by 50.8 mm) photographic slides, or equivalent, to
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ThistestmethodisunderthejurisdictionofASTMCommitteeF06onResilient
separate specimens during conditioning and recovery periods.
Floor Coverings and is the direct responsibility of Subcommittee F06.30 on Test
Methods—Performance.
Current edition approved Aug. 1, 2006. Published September 2006. Originally 5. Sampling, Test Specimens and Test Units
approved in 1987. Last previous edition approved in 2000 as F 970–00.
5.1 The specimens shall be 2 by 2 in. (50.8 by 50.8 mm).
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
The test unit shall consist of three specimens.
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
5.2 The central one square inch test area of each specimen
the ASTM website.
should be free of mortar lines or other embossing lines, if
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For additional information, see Resilient Floor Covering Institute (RFCI)
possible. If not possible, the largest flat, raised area should be
document, Static LimitTesting of Resilient Flooring Products, available from RFCI,
401 E. Jefferson, Suite 102, Rockville, MD 20850, www.rfci.com centered on the specimen.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
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F970–06
under the indentation machine plunger as will fit.
7.4 Square the stack of specimen/indentor plate sets and
then center the stack under the plunger of the indentation
machine.
7.5 Check all clearances to be sure that the plunger and
major load shaft with weight platform and weights will b
...
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