1、Designation:D2512(Reapproved 2017)Standard Specification forRound Timber Piles1This standard is issued under the fixed designation D25;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses i
2、ndicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers the physical characteristics ofunused round timber p
3、iles to be used either treated or un-treated.1.2 This specification is not intended for preused pilesunless the piles have the quality specified by this specificationand design stresses equal to or greater than those derived fromMethod D2899.1.3 The values stated in inch-pound units are to be regard
4、edas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of th
5、is standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decis
6、ion on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D9 Terminology Relating to Wood and Wood-Based Prod-uctsD2555 Practice for Establishin
7、g Clear Wood Strength ValuesD2899 Practice for Establishing Allowable Stresses forRound Timber Piles3.Species of Wood3.1 Piles shall be of any species of wood for which clearwood strength values are given in Test Methods D2555.4.Classification4.1 Timber piles are commonly used to transfer structural
8、loads to sub surface soil bearing strata by way of friction or tipend bearing forces,or both.4.2 Method D2899 provides a basis for specifying the pilesize.This standard gives a procedure for estimating the designstress at any location along the pile length.As design stressmust always exceed that imp
9、osed under service conditions,thequotient of the structural loads divided by the design stressgives an estimate of the minimum section property required atany location.4.3 Under this specification,pile size requirements esti-mated at a critical location are extrapolated to either the tip orbutt end
10、assuming a linear taper.For this specification,piles areclassified by nominal circumference and length.5.Quality Requirement(All Piles)5.1 Piles shall be of sound wood,free of decay,insectattack,marine borer attack,and Limnoria damage,except asherein allowed in 13.2 and 14.1.5.2 Piles shall be cut a
11、bove the ground swell and have ataper from butt to tip.5.3 Piles shall have an average rate of growth measured inthe outer 50%of the radius at the pile tip of not less than 6rings per inch and shall have an average summerwood contentof not less than 33.3%in the outer 50%of the tip radius.Exception:P
12、iles with less than 6 rings per inch are acceptableif the average is 50%or more summerwood present in theouter 50%of the pile tip radius.5.4 Piles that cannot be adequately inspected for the physi-cal requirements specified in this specification due to adheringbarnacles or other material shall not b
13、e permitted.6.Lengths6.1 All piles shall be furnished in lengths specified,exceptthat tolerances shall be allowed as follows:1This specification is under the jurisdiction of ASTM Committee D07 on Woodand is under the jurisdiction of Subcommittee D07.04 on Pole and Pile Products.Current edition appro
14、ved Oct.1,2017.Published October 2017.Originallyapproved in 1915.Last previous edition approved in 2012 as D25 12.DOI:10.1520/D0025-12R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume info
15、rmation,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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization es
16、tablished in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.1.1 Piles 40 ft(12.2 m)and shorterplus 1 ft(0.3 m),minus 6 in.(152 mm).6.1.2 Piles 41 ft(12.5 m)or longerplus 2 ft(0.6 m),minus6 in.(152 mm).7.Sizes7.1 Pile sizes are specified according to nominal circumfer-ence 3 ft from the butt or at the tip.Tables are provided inAppendix X1.1 to facilitate the se
