ASTM F1679-00
(Test Method)Standard Test Method for Using a Variable Incidence Tribometer (VIT)
Standard Test Method for Using a Variable Incidence Tribometer (VIT)
SCOPE
1.1 This test method covers the operational procedures for using a variable incidence tribometer (VIT) for determining the slip resistance of footwear sole, heel, or related materials (test feet) against planar walkway surfaces or walkway surrogates (test surfaces) in either the laboratory or field under dry, wet, or contaminated conditions. This test method does not address all methodological issues (for example, test surface and test foot material selection and preparation, experimental design, or report preparation).
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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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An American National Standard
Designation: F 1679 – 00
Standard Test Method for
Using a Variable Incidence Tribometer (VIT)
This standard is issued under the fixed designation F 1679; 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 4.2 The measurement made by this apparatus relates to slip
resistance. Other factors can affect slip resistance. When this
1.1 This test method covers the operational procedures for
test method is used in field tests, relevant factors shall be
using a variable incidence tribometer (VIT) for determining
described.
the slip resistance of footwear sole, heel, or related materials
(test feet) against planar walkway surfaces or walkway surro-
5. Apparatus
gates (test surfaces) in either the laboratory or field under dry,
5.1 Mast Assembly—A rigid metal frame attached to the
wet, or contaminated conditions. This test method does not
chassis with a hinge joint permitting its inclination to any angle
address all methodological issues (for example, test surface
from vertical to 45°.
and test foot material selection and preparation, experimental
5.2 Handle—A round metal grip at the top of the mast
design, or report preparation).
assembly that can be used to lift and carry the tester and is
1.2 The values stated in inch-pound units are to be regarded
grasped by the operator to apply a downward force to the tester
as the standard. The values given in parentheses are for
to hold it stationary while operating it.
information only.
5.3 Actuating Cylinder—A pneumatic cylinder mounted to
1.3 This standard does not purport to address all of the
the mast assembly by a hinged joint to permit swinging motion
safety concerns, if any, associated with its use. It is the
of the foot.
responsibility of the user of this standard to establish appro-
5.4 Test Foot Assembly—The test foot is affixed to the end
priate safety and health practices and determine the applica-
of the actuating cylinder piston rod by means of a ball joint to
bility of regulatory limitations prior to use.
permit application of the operating force of the test foot against
2. Referenced Documents the test surface. A coil spring brings the foot to approximate
neutral alignment following each power stroke.
2.1 ASTM Standards:
5.5 Strut—The actuating cylinder and test foot assembly
F 1646 Terminology Relating to Safety and Traction for
comprise the strut. It is the angular displacement of this
Footwear
assembly about its hinge pin at the top that permits the slippage
3. Terminology
motion of the foot.
5.6 Control Valve—The valve is actuated by pressing the
3.1 Definitions—For definitions of terms, refer to Terminol-
palm button. A pneumatic spindle valve attached to the mast
ogy F 1646.
will actuate the cylinder, causing it to stroke.
4. Significance and Use
5.7 Pressure System—The pressure operation of the tester is
powered by a compressed gas source mounted on the rear of
4.1 The VIT is designed to determine the slip resistance of
the chassis. This controlled pressure is piped to the control
footwear materials, walkway surfaces, or surrogates under field
valve by tubing that flexes to accommodate mast inclination
or laboratory conditions so that their slip-resistant qualities
variations. The operating pressure may be regulated by the
may be evaluated.
hex-key wrench adjustment.
5.8 Hex-Key Wrench, ⁄16-in. (5-mm) size.
This test method is under the jurisdiction of ASTM Committee F13 on Safety
and Traction for Footwear and is the direct responsibility of Subcommittee F13.10
6. Test Foot and Test Surface
on Traction.
Current edition approved March 10, 2000. Published June 2000. Originally
6.1 Test Foot:
published as F 1679–96. Last previous edition F 1679–96.
6.1.1 The test foot material on the bottom of the test foot is
The English XL is covered by a patent held by William English and is available
prepared by gluing a 1.25-in. (3.2-cm) diameter disk of the test
from William English, Inc., 20500 North River Rd., Alva, FL 33920. It has been
foot material, sheen side exposed, using a suitable adhesive,
found suitable for this use. Interested parties are invited to submit information
regarding the identification of acceptable alternatives to this patented item to the
such as epoxy.
Committee on Standards, ASTM Headquarters, 100 Barr Harbor Drive, West
6.1.2 If the test foot is removed from the ball joint for
Conshohocken, PA 19428-2959. Your comments will receive careful consideration
sanding, it is then screwed into the nut on the ball joint until
at a meeting of the responsible technical committee, which you may attend.
Annual Book of ASTM Standards, Vol 15.07. snug and then backed off one-fourth turn to prevent binding.
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