ANSI ASTM F2128-2013 Standard Test Method for Treestand Repetitive Loading Capability《TREESTAND反复载荷能力的试验方法》.pdf

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1、Designation: F2128 13 An American National StandardStandard Test Method forTreestand Repetitive Loading Capability1This standard is issued under the fixed designation F2128; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year

2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the procedures for determiningthe capability of climbing and ladder treestands and tripods

3、towithstand repeated loading relative to the manufacturers ratedcapacity.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This sta

4、ndard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1

5、ASTM Standards:2F2124 Practice for Testing Treestand Ladder, Tripod Standand Climbing Stick Load Capacity3. Terminology3.1 The terminology and definitions in the referenced docu-ments are applicable to this practice.3.2 Definitions:3.2.1 backbar or V-barthe adjustable component of aclimbing treestan

6、d or handclimber that engages the tree toprovide support. The backbar may be rigid or flexible.3.2.2 climbing treestanda treestand that provides both themeans to ascend the tree, and allow the user to remain at adesired elevation.3.2.3 handclimber, or climbing aida device to assistclimbing with a cl

7、imbing treestand. A structure that allows theuser to support his weight when lifting a climbing treestandwith his legs.3.2.4 ladder treestanda treestand that is secured to the treeat the elevation where the platform is located. (The laddertreestand can be secured to the tree at other locations and h

8、assteps that are used to reach the platform or hunting position.)3.2.5 non-climbing, fixed position or hang-on treestandatreestand that is secured to the tree at the elevation where it isused. (The user usually ascends the tree by some means andthen lifts the treestand to the desired position and se

9、cures it foruse.)3.2.6 platformthe horizontal structural area of a treestandon which the user stands or places his feet, or both.3.2.7 treestanda device designed to be affixed to a tree orits branches so as to permit an individual to sit or stand thereonfor the purpose of attaining an elevated posit

10、ion from which toobserve, photograph or hunt.3.2.8 two person treestanda ladder or hang-on treestanddesigned and marketed for use by two persons simultaneously.4. Summary of Test Method4.1 A treestand is mounted so that its platform is perpen-dicular to a rigid wood or metal pole when the rate loadc

11、apacity is applied parallel to the mounting pole. The load isapplied vertically and is guided so that it is applied at thelocations applied when ascending or descending a tree on thetreestand. In the case of a ladder treestand or tripod, the load isapplied to the rungs of the ladder or tripod. The t

12、est subject isnoted after a certain number of loading cycles, by means of athorough visual inspection, to determine if any structuraldamage such as yielding or cracking, or both, has occurred.4.2 Stand up-sit down two-piece climbersboth seat andfoot sections may be tested at the same time.5. Signifi

13、cance and Use5.1 This test method is intended for quality assurance andproduction control purposes with recognition that individualusage will vary considerably. This test method is not intendedto be an independent material or product-acceptance test.6. Apparatus6.1 Arigid, round wood or metal pole,

14、preferably vertical, isused to mount the subject product such that pole deflection isminimized.1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment, Playing Surfaces, and Facilitiesand is the direct responsibility ofSubcommittee F08.16 on Archery Products.Current edit

15、ion approved May 1, 2013. Published May 2013. Originallyapproved in 2001. Last previous edition approved in 2009 as F2128 09. DOI:10.1520/F2128-13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandard

16、s volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.1.1 The mounting pole diameter shall be 10 6 1 in. (2546 25.4 mm).6.2 The load shall be applied us

17、ing either calibrated weightsor a mechanical device in conjunction with a calibrated loadcell.6.2.1 The use of calibrated weights requires that weightplacement be accurate to assure that the load applicationcentroid is coincident with the boundaries defined and meetsthe requirements as given in 6.3.

18、 Caution should be exercisedfor operator protection with the use of weights in case ofslippage or premature failure.6.2.2 The use of a mechanical device such as a tensiletesting machine or hydraulic power, in combination withpulleys, fulcrums or bearing to redirect forces, requires the useof a calib

19、rated load cell attached adjacent to the test subject toaccount for friction losses.6.3 The application of the load shall be at a point on theplatform area that is the geometric centroid of the test subjectsload placement area while ascending or descending a tree. Theapplication of the load on a lad

20、der treestand shall be at a pointon the rung area which is the geometric center.6.3.1 The load shall be applied to the test subject over a 100in.2(0.065 m2) area for climbing treestands and over a 25 in.2(0.016 m2) area for ladder treestands by either: (1) controlledapplication of calibrated weights

21、, or (2) as described in 6.2.2,to a flat rectangular steel plate 10 in. (254 mm) wide by 10 in.(254 mm) long and a minimum of12 in. (12.7 mm) thick forclimbing treestands and 5 in. (127 mm) wide by 5 in. (127 mm)long for ladder treestands and a minimum of12 in. (12.7 mm)thick on top of the test subj

22、ect. The edges of the load plateadjacent to the test subject shall be deburred with 0.015/0.030in. (0.381/0.762 mm) radius to reduce damage to the testsubject by sharp corners. The load shall be applied at a velocityno more than12 ft/s (9.144 m/min).6.3.2 A14 in. (6.350mm) thick 90 durometer rubber

23、sheetmay be placed between the test subject and the load plate andshall be, at a minimum, at least equal in size and symmetricalto the load plate (to prevent the metal load plate from directlycontacting the test subject).NOTE 1If load guidance is required, fabrication and attachment of anynecessary

24、guide bars to this load plate by welding must assure that theplate remain flat and free of distortion.6.3.3 The load plate shall be positioned on the test subjectwith its center as close to the point as given in 6.3 as possible,yet maintaining the 100 in.2(0.065 m2)or25in.2(0.016 m2)respective conta

25、ct area. A centerline of the load plate must beparallel to the major axis (axis of symmetry) of the test subject.7. Procedure7.1 Read instructions accompanying the test subject toascertain the proper procedure for use and mounting and securethe test subject to the mounting pole such that the platfor

26、m(plane of the platform) is perpendicular to the mounting pole.If necessary, use minimum auxiliary temporary means tomaintain the subject in the correct position during set-up.(Frictional forces, without a load on the subject, may not besufficient in some cases for the subject to remain in position)

27、.A small band on the mounting pole may by necessary.7.2 By geometric means, determine the location of the loadapplication points as given in 6.3 and mark accordingly.7.3 Determine if the test subject will deflect sufficientlyduring the test to allow the load plate or weight to slip or shift.If so, p

28、rovide auxiliary means such as clamps or stops toeliminate sideways movement of the load plate to protectoperators.7.4 The load (calibrated weight) shall be equal to the testsubjects rated capacity (except as noted within Section 6.1.6of Practice F2124). For example, a test subject with a ratedcapac

29、ity of 300 lbs (136.1 kg) shall be tested using a load of300 lbs (136.1 kg).7.5 The load shall be applied for a minimum time of onesecond and then removed completely. The repetitive frequencyof load application and removal shall be no more than 30cycles/min, that is, the load is applied and then rem

30、oved withinno less than 2 s (to avoid heating).7.6 The repetitive loading shall be 10 000 cycles forclimbing treestands. This testing based on a person using astand two times a day (10 cycles up, 10 cycles down each time)for 25 days each year for 10 years. The number of repetitiveloading cycles for

31、ladder and tripod stands shall be the numberof steps multiplied by 500 (based on usage of cycles up anddown with each use, 25 days per year for 10 years). Testing onladder and tripod stands shall be performed on one step withthe test subject assembled and in-place against the test pole(when applicab

32、le). The step shall be chosen at a locationapproximately two-thirds of the total assembled vertical height.For ladder treestands and tripods capable of supporting twopersons, the number of repetitive loading cycles shall be thenumber of steps multiplied by 1000 to account for two personsclimbing.7.7

33、 Periodic checks at the end of each 3000 cycles shall bemade and a note shall be made if the test subject, or loadapplication apparatus, moves (shifts) from its initial equilib-rium position on the mounting pile, whether the test subjectcontinues to support the applied load, and in general whetheran

34、y changes have occurred during the test.7.8 A thorough inspection shall be made and noted toidentify any and all yielding, cracking or other permanentdeformation as a result of the repetitive loading.8. Report8.1 Recording of results shall include the following:8.1.1 Identification of test subject m

35、odel, manufacturer, andrated capacity.8.1.2 Photograph of test subject.8.1.3 Photograph of test set-up (three views: side, top, andend).8.1.4 Verification of calibration.8.1.5 Date of test.8.1.6 If movement (shifting) has been detected as given in7.7, a description shall be recorded.F2128 1328.1.7 A

36、 description and detailed (close-up) photographs ofany and all permanent deformation that has been observed andnoted as given in 7.8 shall be recorded.8.1.8 A note shall be recorded whether the test subjectremained free of defects.8.2 Pass-Fail Criterion:8.2.1 Any cracking or other structural defect

37、s noted shall bea cause for failure of the repetitive load test.8.2.2 If a treestand fails this test the stand and a copy of thetest data shall be returned to the manufacturer.9. Precision and Bias9.1 No statement is made about either the precision or biasof Test Method F2128 for measuring load capa

38、city since theresult merely states whether there is conformance to the criteriafor success specified in the procedure.10. Keywords10.1 backbar; climbing aid; platform; treestandAPPENDIX(Nonmandatory Information)X1. Additional InformationX1.1 This standard is provided for use by manufacturers oftrees

39、tands and testing companies. Criteria has been developedfor certification of treestands and this standard is an integralpart of the certification. However, a treestand conforming tothis standard alone does not constitute certification and thosemanufacturers desiring certification must meet all appli

40、cablestandards as a minimum requirement.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the

41、 riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of

42、 this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldm

43、ake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F2128 133