ASTM F2128-2005 Standard Test Method for Treestand Repetitive Loading Capability《Treestand反复荷载能力的标准试验方法》.pdf

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1、Designation: F 2128 05An American National StandardStandard Test Method forTreestand Repetitive Loading Capability1This standard is issued under the fixed designation F 2128; 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the procedures for determiningthe capability of climbing treestands to withstand repeated

3、loading relative to the manufacturers rated capacity.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 standard does not purpo

4、rt 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 ASTM Standards:2F 21

5、24 Practice for Testing Ladder Treestand, Tripod Tree-stand and 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 treestand or handclim

6、ber 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 climbing treest

7、and. 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 thetree at the elevation where the platform is located. (The laddertreestand can be secured to the tree at other locations and hassteps that

8、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 secures it foru

9、se.)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 position from whic

10、h 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 loadcapacity is ap

11、plied 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. The test subject is noted after a certain number ofloading cycles, by means of a thorough visual inspection, todetermine

12、 if any structural damage such as yielding or crack-ing, or both, has occurred. In the case of a ladder treestand, theload is applied to the rungs of the ladder. The test subject isnoted after a certain number of loading cycles, by means of athorough visual inspection, to determine if any structural

13、damage 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.1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcomm

14、ittee F08.16 onArchery Products.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 2001. Last previous edition approved in 2001 as F 2128 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For

15、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Significance and Use5.1 This test method is intended for quality ass

16、urance 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, preferably vertical, isused to mount the subject product such

17、 that pole deflection isminimized.6.1.1 The mounting pole diameter shall be 10 in. (254 mm),61 in. (25.4 mm).6.2 The load shall be applied using either calibrated weightsor a mechanical device in conjunction with a calibrated loadcell.6.2.1 The use of calibrated weights requires that weightplacement

18、 be accurate to assure that the load applicationcentroid is coincident with the boundaries defined and meetsthe requirements as given in 6.3. 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 a

19、s a tensiletesting machine or hydraulic power, in combination withpulleys, fulcrums or bearing to redirect forces, requires the useof a calibrated 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 tha

20、t is the geometric centroid of the test subjectsload placement area while ascending or descending a tree. Theapplication of the load on a ladder 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) ar

21、ea for climbing treestands and over a 25 in.2(0.016 m2) area for ladder treestands by either: (1) controlledapplication of calibrated weights, 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

22、 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 subject. 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

23、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 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 t

24、he metal load plate from directlycontacting the test subject).NOTE 1If load guidance is required, fabrication and attachment of anynecessary 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 subj

25、ectwith 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 contact 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

26、 the test subject toascertain the proper procedure for use and mounting and securethe test subject to the mounting pole such that the platform(plane of the platform) is perpendicular to the mounting pole.If necessary, use minimum auxiliary temporary means tomaintain the subject in the correct positi

27、on during set-up.(Frictional forces, without a load on the subject, may not besufficient in some cases for the subject to remain in position).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 accor

28、dingly.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, provide auxiliary means such as clamps or stops toeliminate sideways movement of the load plate to protectoperators.7.4 The load (calibrated weight) shall be eq

29、ual to the testsubjects rated capacity (except as noted within Section 6.1.6of Practice F 2124). For example, a test subject with a ratedcapacity 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 com

30、pletely. The repetitive frequencyof load application and removal shall be no more than 30cycles/min, that is, the load is applied and then removed 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

31、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 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). Tes

32、ting onladder and tripod stands shall be performed on one step withthe test subject assembled and in-place against the test pole(when applicable). The step shall be chosen at a locationapproximately two-thirds of the total assembled vertical height.For ladder treestands capable of supporting two per

33、sons, thenumber of repetitive loading cycles shall be the number ofsteps multiplied by 1000 to account for two persons climbing.7.7 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

34、equilib-rium position on the mounting pile, whether the test subjectcontinues to support the applied load, and in general whetherany 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 re

35、sult of the repetitive loading.8. Report8.1 Recording of results shall include the following:8.1.1 Identification of test subject model, manufacturer, andrated capacity.8.1.2 Photograph of test subject.8.1.3 Photograph of test set-up (three views: side, top, andend).F21280528.1.4 Verification of cal

36、ibration.8.1.5 Date of test.8.1.6 If movement (shifting) has been detected as given in7.7, a description shall be recorded.8.1.7 A 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

37、be recorded whether the test subjectremained free of defects.8.2 Pass-Fail Criterion:8.2.1 Any cracking or other structural defects 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 manufac

38、turer.9. Precision and Bias9.1 No statement is made about either the precision or biasof Test Method F 2128 for measuring load capacity since theresult merely states whether there is conformance to the criteriafor success specified in the procedure.10. Keywords10.1 backbar; climbing aid; platform; t

39、reestandAPPENDIX(Nonmandatory Information)X1. Additional InformationX1.1 This standard is provided for use by manufacturers oftreestands and testing companies. Criteria has been developedfor certification of treestands and this standard is an integralpart of the certification. However, a treestand c

40、onforming tothis standard alone does not constitute certification and thosemanufacturers desiring certification must meet all applicablestandards as a minimum requirement.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedi

41、n this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the 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 mu

42、st be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of th

43、eresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake 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).F2128053