ASTM F2128-2013 Standard Test Method for Treestand Repetitive Loading Capability《攀树架反复荷载能力的标准试验方法》.pdf

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1、Designation: F2128 09F2128 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, t

2、he year 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 determining the capability of climbing and ladder treestands and

3、 tripods towithstand repeated loading relative to the manufacturers rated capacity.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.

4、1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Doc

5、uments2.1 ASTM Standards:2F2124 Practice for Testing Treestand Ladder, Tripod Stand and Climbing Stick Load Capacity3. Terminology3.1 The terminology and definitions in the referenced documents are applicable to this practice.3.2 Definitions:3.2.1 backbar or V-barthe adjustable component of a climbi

6、ng treestand or handclimber that engages the tree to providesupport. The backbar may be rigid or flexible.3.2.2 climbing treestanda treestand that provides both the means to ascend the tree, and allow the user to remain at a desiredelevation.3.2.3 handclimber, or climbing aida device to assist climb

7、ing with a climbing treestand. A structure that allows the user tosupport his weight when lifting a climbing treestand with his legs.3.2.4 ladder treestanda treestand that is secured to the tree at the elevation where the platform is located. (The ladder treestandcan be secured to the tree at other

8、locations and has steps that are used to reach the platform or hunting position.)3.2.5 non-climbing, fixed position or hang-on treestanda treestand that is secured to the tree at the elevation where it is used.(The user usually ascends the tree by some means and then lifts the treestand to the desir

9、ed position and secures it for use.)3.2.6 platformthe horizontal structural area of a treestand on which the user stands or places his feet, or both.3.2.7 treestanda device designed to be affixed to a tree or its branches so as to permit an individual to sit or stand thereonfor the purpose of attain

10、ing an elevated position from which to observe, photograph or hunt.3.2.8 two person treestanda ladder or hang-on treestand designed and marketed for use by two persons simultaneously.4. Summary of Test Method4.1 A treestand is mounted so that its platform is perpendicular to a rigid wood or metal po

11、le when the rate load capacity isapplied parallel to the mounting pole. The load is applied vertically and is guided so that it is applied at the locations applied whenascending or descending a tree on the treestand. The test subject is noted after a certain number of loading cycles, by means of1 Th

12、is test method is under the jurisdiction ofASTM Committee F08 on Sports Equipment, Playing Surfaces, and Facilitiesand is the direct responsibility of SubcommitteeF08.16 on Archery Products.Current edition approved Sept. 1, 2009May 1, 2013. Published October 2009May 2013. Originally approved in 2001

13、. Last previous edition approved in 20052009 asF2128 05.F2128 09. DOI: 10.1520/F2128-09.10.1520/F2128-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standard

14、s Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately,

15、ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1a th

16、orough visual inspection, to determine if any structural damage such as yielding or cracking, or both, has occurred. In the caseof a ladder treestand or tripod, the load is applied to the rungs of the ladder or tripod. The test subject is noted after a certain numberof loading cycles, by means of a

17、thorough visual inspection, to determine if any structural damage such as yielding or cracking,or both, has occurred.4.2 Stand up-sit down two-piece climbersboth seat and foot sections may be tested at the same time.5. Significance and Use5.1 This test method is intended for quality assurance and pr

18、oduction control purposes with recognition that individual usagewill vary considerably. This test method is not intended to be an independent material or product-acceptance test.6. Apparatus6.1 A rigid, round wood or metal pole, preferably vertical, is used to mount the subject product such that pol

19、e deflection isminimized.6.1.1 The mounting pole diameter shall be 10 6 1 in. (254 6 25.4 mm).6.2 The load shall be applied using either calibrated weights or a mechanical device in conjunction with a calibrated load cell.6.2.1 The use of calibrated weights requires that weight placement be accurate

20、 to assure that the load application centroid iscoincident with the boundaries defined and meets the requirements as given in 6.3. Caution should be exercised for operatorprotection with the use of weights in case of slippage or premature failure.6.2.2 The use of a mechanical device such as a tensil

21、e testing machine or hydraulic power, in combination with pulleys,fulcrums or bearing to redirect forces, requires the use of a calibrated load cell attached adjacent to the test subject to account forfriction losses.6.3 The application of the load shall be at a point on the platform area that is th

22、e geometric centroid of the test subjects loadplacement area while ascending or descending a tree. The application of the load on a ladder treestand shall be at a point on therung area which is the geometric center.6.3.1 The load shall be applied to the test subject over a 100 in.2 (0.065 m2) area f

23、or climbing treestands and over a 25 in.2 (0.016m2) area for ladder treestands by either: (1) controlled application of calibrated weights, or (2) as described in 6.2.2, to a flatrectangular steel plate 10 in. (254 mm) wide by 10 in. (254 mm) long and a minimum of 12 in. (12.7 mm) thick for climbing

24、treestands and 5 in. (127 mm) wide by 5 in. (127 mm) long for ladder treestands and a minimum of 12 in. (12.7 mm) thick on topof the test subject. The edges of the load plate adjacent to the test subject shall be deburred with 0.015/0.030 in. (0.381/0.762 mm)radius to reduce damage to the test subje

25、ct by sharp corners. The load shall be applied at a velocity no more than 12 ft/s (9.144m/min).6.3.2 A 14 in. (6.350mm) thick 90 durometer rubber sheet may be placed between the test subject and the load plate and shallbe, at a minimum, at least equal in size and symmetrical to the load plate (to pr

26、event the metal load plate from directly contactingthe test subject).NOTE 1If load guidance is required, fabrication and attachment of any necessary guide bars to this load plate by welding must assure that the plateremain flat and free of distortion.6.3.3 The load plate shall be positioned on the t

27、est subject with its center as close to the point as given in 6.3 as possible, yetmaintaining the 100 in.2 (0.065 m2) or 25 in.2 (0.016 m2) respective contact area. A centerline of the load plate must be parallelto the major axis (axis of symmetry) of the test subject.7. Procedure7.1 Read instructio

28、ns accompanying the test subject to ascertain the proper procedure for use and mounting and secure the testsubject to the mounting pole such that the platform (plane of the platform) is perpendicular to the mounting pole. If necessary, useminimum auxiliary temporary means to maintain the subject in

29、the correct position during set-up. (Frictional forces, without a loadon the subject, may not be sufficient in some cases for the subject to remain in position). A small band on the mounting pole mayby necessary.7.2 By geometric means, determine the location of the load application points as given i

30、n 6.3 and mark accordingly.7.3 Determine if the test subject will deflect sufficiently during the test to allow the load plate or weight to slip or shift. If so,provide auxiliary means such as clamps or stops to eliminate sideways movement of the load plate to protect operators.7.4 The load (calibra

31、ted weight) shall be equal to the test subjects rated capacity (except as noted within Section 6.1.6 ofPractice F2124). For example, a test subject with a rated capacity of 300 lbs (136.1 kg) shall be tested using a load of 300 lbs (136.1kg).7.5 The load shall be applied for a minimum time of one se

32、cond and then removed completely. The repetitive frequency of loadapplication and removal shall be no more than 30 cycles/min, that is, the load is applied and then removed within no less than 2s (to avoid heating).F2128 1327.6 The repetitive loading shall be 10 000 cycles for climbing treestands. T

33、his testing based on a person using a stand two timesa day (10 cycles up, 10 cycles down each time) for 25 days each year for 10 years. The number of repetitive loading cycles forladder and tripod stands shall be the number of steps multiplied by 500 (based on usage of cycles up and down with each u

34、se, 25days per year for 10 years). Testing on ladder and tripod stands shall be performed on one step with the test subject assembled andin-place against the test pole (when applicable). The step shall be chosen at a location approximately two-thirds of the totalassembled vertical height. For ladder

35、 treestands and tripods capable of supporting two persons, the number of repetitive loadingcycles shall be the number of steps multiplied by 1000 to account for two persons climbing.7.7 Periodic checks at the end of each 3000 cycles shall be made and a note shall be made if the test subject, or load

36、 applicationapparatus, moves (shifts) from its initial equilibrium position on the mounting pile, whether the test subject continues to supportthe applied load, and in general whether any changes have occurred during the test.7.8 A thorough inspection shall be made and noted to identify any and all

37、yielding, cracking or other permanent deformationas a result of the repetitive loading.8. Report8.1 Recording of results shall include the following:8.1.1 Identification of test subject model, manufacturer, and rated capacity.8.1.2 Photograph of test subject.8.1.3 Photograph of test set-up (three vi

38、ews: side, top, and end).8.1.4 Verification of calibration.8.1.5 Date of test.8.1.6 If movement (shifting) has been detected as given in 7.7, a description shall be recorded.8.1.7 Adescription and detailed (close-up) photographs of any and all permanent deformation that has been observed and notedas

39、 given in 7.8 shall be recorded.8.1.8 A note shall be recorded whether the test subject remained free of defects.8.2 Pass-Fail Criterion:8.2.1 Any cracking or other structural defects noted shall be a cause for failure of the repetitive load test.8.2.2 If a treestand fails this test the stand and a

40、copy of the test data shall be returned to the manufacturer.9. Precision and Bias9.1 No statement is made about either the precision or bias of Test Method F2128 for measuring load capacity since the resultmerely states whether there is conformance to the criteria for success specified in the proced

41、ure.10. Keywords10.1 backbar; climbing aid; platform; treestandAPPENDIX(Nonmandatory Information)X1. Additional InformationX1.1 This standard is provided for use by manufacturers of treestands and testing companies. Criteria has been developed forcertification of treestands and this standard is an i

42、ntegral part of the certification. However, a treestand conforming to this standardalone does not constitute certification and those manufacturers desiring certification must meet all applicable standards as aminimum requirement.F2128 133ASTM International takes no position respecting the validity o

43、f 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 riskof infringement of such rights, are entirely their own responsibility.This standard is subject to

44、 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 this standard or for additional standardsand should be addressed to ASTM International Headquarters. Y

45、our 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 shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is co

46、pyrighted 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 134