ASTM F1951-2008 Standard Specification for Determination of Accessibility of Surface Systems Under and Around Playground Equipment.pdf

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1、Designation: F 1951 08An American National StandardStandard Specification forDetermination of Accessibility of Surface Systems Underand Around Playground Equipment1This standard is issued under the fixed designation F 1951; the number immediately following the designation indicates the year oforigin

2、al adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThe need for systematic and consistent means of evaluating the c

3、apability of surface systems toprovide access to playgrounds has been amplified by the passage of the Federal Americans withDisabilities Act. The goal of this specification is to establish uniform means to measure thecharacteristics of surface systems in order to provide the potential buyer with per

4、formancespecifications to select materials for use as an accessible surface under and around playgroundequipment.1. Scope1.1 This specification establishes minimum characteristicsfor those factors that determine accessibility. This specificationapplies to all types of materials that can be used unde

5、r andaround playground equipment.1.2 The material under and around playground equipmentthat meets this specification must also comply with Specifica-tion F 1292 if the surface is within the fall zone.1.3 This specification does not imply that an injury cannotbe incurred if the surface system complie

6、s with this specifica-tion.1.4 The values stated in inch-pound units are to be regardedas standard. The SI units given in parentheses are for informa-tion only (see ASTM SI10).1.5 The following precautionary statement pertains only tothe test method portions, Sections 6 and 7, of this specification:

7、This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents

8、2.1 ASTM Standards:2ASTM SI10 IEEE/ASTM SI 10 American National Stan-dard for Use of the International System of Units (SI): TheModern Metric SystemE 177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE 691 Practice for Conducting an Interlaboratory Study toDetermine the Precisi

9、on of a Test MethodF 1292 Specification for Impact Attenuation of SurfacingMaterials Within the Use Zone of Playground EquipmentF 1487 Consumer Safety Performance Specification forPlayground Equipment for Public Use2.2 U.S. Architectural and Transportation Barriers Com-pliance Board Document:3Americ

10、ans with Disabilities Act Accessibility Guidelinesfor Buildings and Facilities2.3 U.S. Consumer Product Safety Commission Docu-ment:4US CPSC Publication No. 325 Handbook for Public Play-ground Safety3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 camber, nthe angular position

11、in the vertical direc-tion of the individual main wheel axis.3.1.1.1 DiscussionZero camber occurs when the wheelaxis is parallel to the ground surface.3.1.2 loose fill system, na surface system consisting ofsmall independent, movable components.3.1.2.1 DiscussionExamples of movable components in-clu

12、de sand, gravel, wood chips, loose rubber, and engineeredwood fiber.1This specification is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.63 onPlayground Surfacing Systems.Current edition approved March 1, 2008. Pub

13、lished March 2008. Originallyapproved in 1999. Last previous edition approved in 1999 as F 1951 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Doc

14、ument Summary page onthe ASTM website.3Available from United States Access Board, 1331 F Street, NW, Suite 1000,Washington, DC 20004-1111, http:/www.access-board.gov/.4Available from United States Consumer Product Safety Commission, 4330 EastWest Highway, Bethesda, MD, 20814, http:/www.cpsc.gov/.1Co

15、pyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.3 maneuverability, nthe ability of a surfacing materialto allow unencumbered traversing or locomotion of a personwith or without prosthetic aids or wheelchair.3.1.4 toe, nthe differenc

16、e in separation distance betweenthe front of the two main wheels and the rear of the two mainwheels of a wheelchair.3.1.4.1 DiscussionProper toe alignment occurs when theaxle is perpendicular to the direction of rolling.4. General Requirements4.1 Playground surfaces represented as complying with thi

17、sspecification shall meet all applicable requirements regardingaccessibility specified herein. Anyone representing compliancewith this specification shall keep such essential records as arenecessary to document any claim that the requirements withinthis specification have been met.4.2 Surface system

18、s that are within the use zone of thesurrounded playground equipment shall be tested in accor-dance with Specification F 1292 and shall comply with theimpact performance requirements of Specification F 1292.Thus, surface systems shall exhibit a head injury criterion(HIC) not exceeding 1000 and a val

19、ue of acceleration recordedduring an impact (g-max) not exceeding 200 from a height ator greater than the fall height of the play structure.NOTE 1This is consistent with the guidance contained in US CPSCPublication No. 325.4.3 Accessibility specification certification compliance shallbe conducted by

20、 an independent accredited testing laboratory.5. Performance Requirement5.1 The test (consisting of five measurements) shall beconducted on a surface that is installed per the manufacturersinstallation instructions. No additional compaction or othermodification shall be permitted.5.2 Maneuverability

21、When tested in accordance with thetest methods described in Sections 6 and 7 of this specification,a surface in place shall have average work per foot (work permeter) values for straight propulsion and for turning less thanthe average work per foot (work per meter) values for straightpropulsion and

22、for turning, respectively, on a hard, smoothsurface with a grade of 7.1 6 0.2 % (1:14).6. Wheelchair Work Measurement MethodStraightPropulsion6.1 Test Equipment and Setup:6.1.1 Test WheelchairA 16-in. (40.64-cm) width rehabili-tation wheelchair with pneumatic rear tires, front wheels withpneumatic t

23、ires, and a total weight of 31 6 4.4 lb (14 6 2 kg)shall be used as the test wheelchair. The rear wheels shall beidentical with 24 by 1.375-in. (61 by 3.5-cm) pneumatic tiresand pushrim diameters of 20 in. (50.8 cm). The front wheelswith pneumatic tires shall be identical with 8 by 1-in. (20.3 by2.5

24、4-cm) wheels with pneumatic tires. One main rear wheelshall be capable of measuring the forces applied to the pushrimthat are tangential to the pushrim and parallel to the directionof travel. The wheelchair shall be adjusted such that there isminimal toe and minimal camber. Tire pressures shall be s

25、et tothe maximum pressure specified by the manufacturer 62 psi.6.1.2 Test Wheelchair RiderA165 +11, 4.4-lb (75 +5, 2kg) test wheelchair rider shall propel the wheelchair duringtesting.6.1.3 Weight of Total SystemThe total weight of thewheelchair-rider system, including any distance measurementor dat

26、a acquisition equipment residing on the wheelchair, shallbe a minimum of 187.2 lb (85 kg) and a maximum of 255 lb(116 kg).6.1.4 Weight DistributionThe wheelchair rider shall beseated in the wheelchair such that 406 2 % of the total weightis supported by the front casters and the rear wheels support

27、theremaining 60 6 2 % when measured in a static position withthe wheelchair riders hands placed on the rear wheel pushrimsin the topmost position.6.1.5 Distance MeasurementA method to measure thetotal distance that the wheelchair has been propelled must bepresent. This distance shall be 6.56 +0.66 /

28、 0 ft (2.0 +0.20 / 0m) from its starting, measured to an accuracy of 6 0.79 in. (2cm).6.1.6 Wheel Angular Displacement Measurement(Optional)A method to measure the angular displacement ofthe pushrim force measuring wheel can be used. It shall havean accuracy of at least 6 0.5.6.1.7 Data AcquisitionA

29、 data acquisition system shall beused to record the forces applied to the pushrim and the end ofthe trial at a minimum frequency of 50 Hz.6.2 Test Specimen:6.2.1 An installed site of playground surfacing shall be usedas the test specimen. The minimum test specimen size shall be4 ft (1.22 m) wide by

30、8 ft (2.44 m) in length.6.2.2 The surface shall be level and free of surface dirt, ice,or contaminants.6.2.3 Testing shall be conducted when surface temperature,as measured by a temperature probe, is between 40 and 100F(4 and 38C).6.3 Test Procedure:6.3.1 Starting from a stationary position with the

31、 wheelchaircasters in the trailing position, the test wheelchair rider shallpropel the wheelchair across the test surface a distance of 6.56+0.66 / 0 ft (2.0 +0.20 / 0 m) using four uniform pushes. Thedistance the wheelchair actually rolls shall be recorded to anaccuracy of 6 0.79 in. (6 2 cm). The

32、wheelchair rider shallcontact the pushrims only during the trial and shall maintainthe same posture assumed during weight distribution measure-ment. The wheelchair shall be propelled in a straight path. Atleast three of the wheelchair wheels shall be in contact with thetest surface during the trial.

33、 Each trial shall be completed in 7.061.0 s.6.3.2 Record the forces applied to the pushrim to anaccuracy of 6 0.15 ft 3 lbf (6 0.2 N 3 m), at a minimumfrequency of 50 Hz.6.3.3 Consider the trial acceptable if it meets the followingcriteria:6.3.3.1 Pushrim torque values below 3.69 ft 3 lbf (5.0 N3 m)

34、 (reverse torque) do not occur;6.3.3.2 One or more wheels do not slip on the surfacecreating torque values above 7.38 ft 3 lbf (10 N 3 m) with noforward movement of the wheelchair;F19510826.3.3.3 The time to complete the 6.56-ft (2.0-m) distance is7.0 6 1.0 s;6.3.3.4 The torque applied to the wheelc

35、hair pushrim is zeroor decreasing at the end of the trial;6.3.3.5 The four propulsion strokes cause the wheelchair totravel a total distance of 6.56 +0.66 / 0 ft (2.0 +0.20 / 0 m).6.3.4 Repeat 6.3.1-6.3.3 until a total of five acceptable trialsare recorded. Use a leveled surface for each trial. If t

36、estingcannot be completed successfully on the test surface, documentthe reasons.6.3.5 Repeat 6.3.1-6.3.4 with the same test wheelchair rideron a hard, smooth surface with a grade of 7.1 6 0.2 % (1:14)and a cross slope of 0 6 0.5 %.6.4 Calculation:6.4.1 Calculation of work per foot (work per meter):6

37、.4.1.1 For each trial, calculate the average torque byintegrating the area under the torque-time curve and dividingby the time to complete the trial.6.4.1.2 Calculate the total work required for each trial bymultiplying the average torque value by the total wheel angulardisplacement. If the test whe

38、elchair was instrumented withonly one pushrim force measuring wheel, multiply this valueby two.6.4.1.3 For each trial, normalize the total work required towork per foot (work per meter) by dividing by the length of thetrial.6.4.2 Alternative method for calculating work per foot(work per meter):6.4.2

39、.1 For each trial, calculate the average work per foot(work per meter) by integrating the area under the torque-angular displacement curve or the torque-distance curve, andthen dividing by the total angular displacement or length of thetrial, respectively. If the test wheelchair was instrumented wit

40、honly one pushrim force measuring wheel, multiply this valueby two.6.4.3 Discard the low and high work per foot (work permeter) values and average the remaining three trials to deter-mine the average work per foot (work per meter) required tonegotiate the test surface and the hard, smooth surface wi

41、th agrade of 7.1 6 0.2 % (1:14).6.5 ReportReport the following information for thestraight propulsion test:6.5.1 A reference to this specification.6.5.2 Complete identification of the playground surfacesystem tested, including manufacturer, type, manufacturers lotnumber, if appropriate, thickness, a

42、nd any other pertinentinformation.6.5.3 Details of the manufacturers installation instructions.NOTE 2No modification or compaction of the surface is permittedbeyond what is stated in the manufacturers installation instructions.6.5.4 Complete identification of the test wheelchair used,including name

43、of manufacturer, model, identification number,and weight.6.5.5 Weight of the test wheelchair rider, total weight andfront-to-rear weight distribution of the wheelchair-rider sys-tem.6.5.6 Optional additional helpful information includes anyother relevant information, including photographs of the tes

44、tsite and of the wheelchair.6.5.7 Date of tests.6.5.8 The name and address of the test institution.6.5.9 Pushrim torque versus time graphs for each trial.6.5.10 Work per foot (work per meter) values to the nearest0.1 ft 3 lbf (0.1 N 3 m) and total trial times for all five trialson the test surface a

45、nd on the hard, smooth surface with a gradeof 7.1 6 0.2 % (1:14).6.5.11 Average work per foot (work per meter) to thenearest 0.1 ft 3 lbf (0.1 N 3 m) for the test surface and for thehard, smooth surface with a grade of 7.1 6 0.2 % (1:14). Iftesting could not be successfully completed on the test sur

46、face,the report must state this, as well as the reasons why testingcould not be performed according to the test procedure. If thewheelchair continued to roll and could not stop at the specifieddistance, the work per foot (work per meter) required tonegotiate the test surface shall be considered less

47、 than on thehard, smooth surface with a grade of 7.1 6 0.2 % (1:14).7. Wheelchair Work Measurement MethodTurning7.1 Test Equipment and Setup:7.1.1 Test WheelchairA 16-in. (40.64-cm) width rehabili-tation wheelchair with pneumatic rear tires, front wheels withpneumatic tires, and a total weight of 31

48、 6 4.4 lb (14 62 kg)shall be used as the test wheelchair. The rear wheels shall beidentical with 24 by 1.375-in. (61 by 3.5-cm) pneumatic tiresand pushrim diameters of 20 in. (50.8 cm). The front wheelswith pneumatic tires shall be identical with 8 by 1-in. (20.3 by2.54-cm) wheels with pneumatic tir

49、es. One main rear wheelshall be capable of measuring the forces applied to the pushrimthat are tangential to the pushrim and parallel to the directionof travel. The wheelchair shall be adjusted such that there isminimal toe and minimal camber. Tire pressures shall be set tothe maximum pressure specified by the manufacturer 62 psi.7.1.2 Test Wheelchair RiderA165 +11, 4.4-lb (75 +5, 2kg) test wheelchair rider shall propel the wheelchair duringtesting.7.1.3 Weight of Total SystemThe total weight of thewheelchair-rider system, including any dis