ASTM D Standard Test Method for Static Coefficient of Friction of Polish- Coated Flooring Surfaces as Measured by the James Machine. Jan 5, The ASTM E slip resistance test standard defines the British pendulum . ASTM D is the basis of the testing of floor “waxes” (floor. Oct 31, ABIC Testing Laboratories, Inc. was authorized to test the following samples of metal floor panels for static coefficient of friction (SCOF).
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This test is often conducted and interpreted by people who have a vested interest in their tribometer having passed d0247 test, and it should not be solely relied upon in deciding whether a slip tester is trustworthy in predicting human traction. It does not provide a minimum DCOF for outdoor areas or ramps. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Leather is not suitable for wet slip testing, as its properties change unpredictably and permanently when it becomes wet. Each has its own appropriate safety standard se. The Tortus digital tribometer slip resistance test method is based on a proprietary or patented device, which makes it ineligible to become an ASTM standard. It now has an official British standard for its use in the field — BS Its findings were published in Further, this test method also establishes a compliance criterion to meet the requirement for a nonhazardous polished walkway surface.
Since friction is not a property of a surface but of an interface, holding one surface of the interface the specification leather constant will provide a measure of the friction contribution of various polish surfaces to the interface. The Technical Products Model 80 is a static slip tester as well and therefore is not suitable for wet testing to assess anti-slip pedestrian safety.
ASTM Committee D21 Marks 50th Anniversary of Standard D Whether in an office building or on a basketball court, the safety of a polished floor is crucial to those walking, running or playing on it. It is a laboratory machine that tests flooring samples and due to its design is not usable on an actual floor.
Kinetic friction astn between moving surfaces; it measures the friction between two surfaces moving against each other such as a book being pushed across a table or a sled being dragged across the ground.
Despite the fact that the ADA never truly endorsed this test method, a great deal of confusion has resulted and misinformation abounds amongst flooring and construction professionals about this poor test method.
It is presently made in the USA by a single manufacturer.
It is a static slip tester essentially a portable version of the James Machine — see below and because it suffers from a stiction problem it is not useful for wet testing. We do not r2047 this measurement. If the floor is likely to be lubricated with water, grease, etc. No one of these slip resistance testers is capable of doing all the tasks that might be needed. The reasons for withdrawal included poor precision in interlaboratory studies, which made it impossible to present a reasonable precision statement as required by ASTM.
We do not recommend its use. The experiential data was collected by an independent accounting firm for the E2047 Specialties Manufacturers Association.
Slip Resistance Testing Standards in 2018
The James machine was designed to measure the static coefficient of friction of an interface of a dried polish film in contact with a specification leather sensor. Testing the Safety of Polished Floors. The substitution of a astk sensor for the specification leather, changing the machine design to measure the dynamic coefficient of friction, or contaminating the frictional interface with water or other substance, will produce data from a different interface than that of D, so the correlation of the conformance criterion of D sstm longer exists.
Which one is the right test for your application?
It relies on a carbon dioxide cartridge, not gravity, therefore providing more accurate results and also allowing for inclined surfaces to be tested. Anderson Materials Evaluation, Inc. We have made a number of custom SCOF measurements for such applications.
Testing the Safety of Polished Floors | ASTM Standardization News
It was once cited by the U. This test method, like the former ASTM Castk not based on actual slip and fall research, however. There are also barefoot area recommendations based on pendulum tests with a soft rubber slider. Click here to see a SlipAlert Video Demonstration.
It has been used for field testing, but is of limited utility in laboratory testing because it requires a long path length of flooring. Safety on flooring and ramps is one of the most common reasons for concern about the static coefficient of friction.
The conformance criteria of this test method may be valid for other surfaces and surface coatings tested by this test method, but this has not been substantiated by correlation with experiential data. A high traction rough surface with large scale asrm due to large sand particles is shown in a macro photograph.