1、Designation:D703221Standard Specification forEstablishing Performance Ratings for Wood-PlasticComposite and Plastic Lumber Deck Boards,Stair Treads,Guards,and Handrails1This standard is issued under the fixed designation D7032;the number immediately following the designation indicates the year ofori
2、ginal 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.Scope1.1 This specification covers procedures to establish aperformance rating
3、 for wood-plastic composite and plasticlumber for use as exterior deck boards,stair treads,guards,andhandrails.The purpose of this specification is to establish abasis for code recognition of these products or systems inexterior applications.NOTE1While wood-plastic composites contain wood or other c
4、ellu-losic materials,the presence of wood or other cellulosic materials inplastic lumber is not required by this specification.Due to non-woodmaterials in wood-plastic composites and plastic lumber the structural,physical,fire,and other attributes may not be similar to those of wood.NOTE2The product
5、s addressed in this standard are consideredcombustible.No fire response characteristic is required in this specifica-tion except for flame spread index as determined in accordance with TestMethod E84.1.1.1 The plastic component of wood-plastic compositesand plastic lumber covered by this specificati
6、on shall consistprimarily of thermoplastics.1.2 Deck boards,stair treads,guards,and handrails coveredby this specification are permitted to be of any code compliantshape and thickness(solid or non-solid).1.3 Wood-plastic composites and plastic lumber are pro-duced in a broad range of fiber and/or re
7、sin formulations.It isrecognized that the performance requirements in this specifi-cation are valid for any material or combination of materialsused as deck boards,stair treads,guards,or handrails.1.4 Details of manufacturing processes are beyond thescope of this specification.1.5 The values stated
8、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.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is
9、 theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 Table of Contents:SectionScope1Referenced Documents2Terminology3General Requirements4Sampling4.1Sample Size4
10、.2Conditioning4.3Flexural Tests4.4Temperature and Moisture Effects4.5Ultraviolet(UV)Resistance Test4.6Freeze-Thaw Resistance Test4.7Biodeterioration Tests4.8Fire Performance Tests4.9Deck Board Performance Requirements5General5.1Flexural Performance Tests5.2Determination of the Unadjusted AllowableLo
11、ad5.3Creep-Recovery Test5.4Mechanical Fastener Holding Tests5.5Slip Resistance Test5.6Guard and Handrail PerformanceRequirements6General6.1Guardrail System Test Requirements6.2One-and Two-Family DwellingRequirements6.2.1.1Handrail Test Requirements(ConcentratedLoad)6.3Report7Independent Inspection8M
12、anufacturing Standard9Precision and Bias10Keywords11Two-Span Test MethodAnnex A1CommentaryAppendix X11.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Internation
13、al Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.1This specification is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.02 on Lumber and EngineeredWood Products.Current ed
14、ition approved Nov.1,2021.Published December 2021.Originallyapproved in 2004.Last previous edition approved in 2017 as D7032 17.DOI:10.1520/D7032-21.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed i
15、n accordance with internationally recognized principles on standardization established 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?2.Referenced Documents2.1 A
16、STM Standards:2D9 Terminology Relating to Wood and Wood-Based Prod-uctsD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD883 Terminology Relating to PlasticsD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD1413 Test Method for Wood Preservatives by LaboratorySoil-Block Cultures(Withdrawn 2016)3D1554 Terminology Relating to Wood-Base Fiber and Par-ticle Panel MaterialsD1761 Test Methods
