ASTM F559-95(2000)
(Test Method)Standard Test Method for Measuring Length of Road Test Courses Using a Fifth Wheel
Standard Test Method for Measuring Length of Road Test Courses Using a Fifth Wheel
SCOPE
1.1 This test method covers the determination of the accurate length measurement of road courses used for testing all types of pneumatic tires on various associated vehicles.
1.2 This test method is intended for use on public highways or closed circuit test courses, or both, that cannot be measured practically by surveying techniques.
1.3 Use of this test method requires that the surface of the test course to be measured shall be sufficiently smooth to preclude bounce or hop of the fifth wheel, which will affect the accuracy of the measurement. The normal highway surface is adequate for this test method.
1.4 It is not the intent or scope of this test method to encompass distance measurements of test courses whose surfaces are irregular, broken up, jagged, etc., such as rock courses, Belgian block, "rumble" surfaces, etc. Snow- and ice-covered surfaces also are excluded.
1.5 The values stated in either inch-pound or SI units are to be regarded separately as standard. The values given in parentheses are for information only.
1.6 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:F559–95 (Reapproved 2000)
Standard Test Method for
Measuring Length of Road Test Courses Using a Fifth
Wheel
This standard is issued under the fixed designation F559; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope attached to the test vehicle and used to measure distances
traveled by that vehicle.
1.1 This test method covers the determination of the accu-
rate length measurement of road courses used for testing all
4. Significance and Use
types of pneumatic tires on various associated vehicles.
4.1 Maps,automobileodometers,andhighwayanddistance
1.2 This test method is intended for use on public highways
markers are not sufficiently accurate to describe the length of a
or closed circuit test courses, or both, that cannot be measured
route for tire testing purposes. The proposed procedure de-
practically by surveying techniques.
scribes a test method for measuring the length of a road course
1.3 Use of this test method requires that the surface of the
with sufficient accuracy for tire testing purposes.
test course to be measured shall be sufficiently smooth to
precludebounceorhopofthefifthwheel,whichwillaffectthe
5. Apparatus
accuracy of the measurement. The normal highway surface is
5.1 Fifth Wheel—The fifth wheel shall meet the require-
adequate for this test method.
ments ofTest Method F457 and shall incorporate an odometer
1.4 It is not the intent or scope of this test method to
ordistancecountercapableofaccumulatingthedistanceofthe
encompass distance measurements of test courses whose sur-
coursetobemeasured.Preferably,thedistancecounterreadout
faces are irregular, broken up, jagged, etc., such as rock
will be in units of 1 m (3.28 ft) or a minimum of 0.25
courses, Belgian block,“ rumble” surfaces, etc. Snow- and
revolution of the fifth wheel. In any case, the distance readout
ice-covered surfaces also are excluded.
shall meet the requirements of Test Method F457.
1.5 The values stated in either inch-pound or SI units are to
be regarded separately as standard. The values given in
6. Procedure
parentheses are for information only.
6.1 Attachthefifthwheeltotherearofthevehicleatapoint
1.6 This standard does not purport to address all of the
not in line with the vehicle wheelpath but midway between the
safety concerns, if any, associated with its use. It is the
vehicle wheelpaths.
responsibility of the user of this standard to establish appro-
6.2 Warmupthefifthwheelbyrunningaminimumof3km
priate safety and health practices and determine the applica-
(2 miles) at approximately 65 km/h (40 mph).
bility of regulatory limitations prior to use.
6.3 Calibrate in accordance with Test Method F457.
6.4 With the fifth wheel in contact with the road surface,
2. Referenced Documents
drive the vehicle to the starting point of the test course to be
2.1 ASTM Standards:
measured. Set its odometer or counter to zero. If the unit is
F457 Test Method for Speed and Distance Calibration of a
non-resettable, record the reading.
Fifth Wheel Equipped With Either Analog or Digital
2 6.5 Drive the vehicle from the starting point of the course
Instrumentation
completelythroughthecourse.Attheendofthecourse,record
F1082 Practice for Tires—Determining Precision for Test
2 the reading on the fifth wheel odometer or counter. If the
Method Standards
counterisnon-resettable,subtracttheinitialreadingatthestart
3. Summary of Test Method of the course from the reading at the end of the course. This
figurerepresentsthedistancetraveledbythevehiclewithinthe
3.1 This test method includes the use of a fifth wheel of
tolerances as specified in Test Method F457. If the course is
known accuracy, incorporating a distance counter that is
sufficiently long that rest or meal breaks are required, then
record each “leg” driven between starting and stopping point
This test method is under the jurisdiction of ASTM Committee F09 on Tires
beforeturningofftheignitionswitch.Thisoperationeliminates
and is the direct responsibility of Subcommittee F09.10 on Structural Integrity.
extra counts caused by high-frequency pulses generated by the
Current edition approved Oct. 10, 1995. Published December 1995. Originally
ignition or buzzer system of the vehicle. Compute the tot
...
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