ASTM_D_6092_-_14.pdf

Designation:D609214Standard Practice forSpecifying Standard Sizes of Stone for Erosion Control1This standard is issued under the fixed designation D6092;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the 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.Scope*1.1 This practice covers size designations and maximumranges in mass or gradation for standard sizes for riprap,spalls,or bedding,or both,used for slope protection of damembankments,streambank erosion control,bridge piers andabutments.Sizes used for outer harbor structures such asbreakwalls,revetments,confined diked disposal structures(heretofore described as armor stone,cover stone,or dimensionstone)for which stone sizes range between 5 and 25 tons,orthat require cut dimensions for layed-up structures are beyondthe scope of this practice.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 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.1.4 This practice offers an organized collection of informa-tion or a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this practice may be applicable inall circumstances.This ASTM standard is not intended torepresent or replace the standard of care by which theadequacy of a given professional service must be judged,norshould this document be applied without consideration of aprojects many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD4992 Practice for Evaluation of Rock to be Used forErosion ControlD5519 Test Methods for Particle Size Analysis of Naturaland Man-Made Riprap MaterialsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 DefinitionsFor definitions of common technical termsin this practice,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 filter/bedding stone/spallsstone,filter stone consist-ing of crushed stone ranging in size from minus 2.0 in.(50mm)to No.100(150 m)and bedding stone,often referred toas“spalls,”consisting of crushed stone ranging in size fromminus 612in.(163 mm)to No.16(1.18 mm).Filter andbedding may be placed in two layers prior to the riprapplacement,that is,a filter layer 8 to 10 in.(200 to 250 mm)thick and a bedding layer of 6 to 8 in.(150 to 200 mm)thick.3.2.2 geotextilessuitable geotextile fabrics that meet thedesign requirements may be used instead of,or in conjunctionwith,the above filter/bedding stone.Suitable cover thicknessmay be required.3.2.3 gradationthe proportions by mass of stones distrib-uted within specified ranges between maximum and minimumlimits.3.2.4 prolate spherea spheroid in which the polar axis isgreater than the equatorial diameter.3.2.5 riprapstone materials generally less than 3000 lb inmass(1400 kg),specially selected and graded,and when1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.17 on Rock for ErosionControl.Current edition approved Feb.1,2014.Published March 2014.Originallyapproved in 1997.Last previous edition approved in 2008 as D6092 97(2008).DOI:10.1520/D6092-14.2For 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 Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 properly placed prevents erosion through minor wave action,or strong currents and thereby preserves the shape of a surface,slope,or the underlying structure.3.2.6 standard size designationone of a group of stoneswith specified gradation limits.4.Summary of Practice4.1 The design team shall establish the size and mass ofgraded quarry stone using acceptable design criteria.If designcriteria and economic factors permit,standard gradationsshown in Tables 1 and 2 should be selected.If using standardsizes,the design team shall select the appropriate gradation;this might require selecting the next larger size,therebycreating an over-de