1、Designation:D447716An American National StandardStandard Specification forRigid(Unplasticized)Poly(Vinyl Chloride)(PVC)Soffit1This standard is issued under the fixed designation D4477;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 specification establishes requirements and testmethods for the materials,dimensions,camber,impactstrength,e
3、xpansion,and appearance of extruded single-wallsoffit manufactured from rigid(unplasticized)PVC compound.Methods of indicating compliance with this specification arealso provided.1.2 The use of PVC recycled plastic in this product shall bein accordance with the requirements in Section 4.1.3 Rigid(un
4、plasticized)poly(vinyl chloride)(PVC)sidingis covered in Specification D3679.1.4 Soffit produced to this specification shall be installed inaccordance with Practice D4756.Reference shall also be madeto the manufacturers installation instructions for the specificproduct to be installed.NOTE1Informati
5、on with regard to soffit maintenance shall beobtained from the manufacturer.1.5 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.1.6 The fo
6、llowing precautionary caveat pertains to the testmethod portion only,Section 6 of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpract
7、ices and determine the applicability of regulatory limita-tions prior to use.NOTE2There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD635 Test Method for Rate of Burning and/or Extent andTime of Burning of Pl
8、astics in a Horizontal PositionD696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2244 Practice for Calculation of Color Toler
9、ances andColor Differences from Instrumentally Measured ColorCoordinatesD2457 Test Method for Specular Gloss of Plastic Films andSolid PlasticsD3679 Specification for Rigid Poly(Vinyl Chloride)(PVC)SidingD3892 Practice for Packaging/Packing of PlasticsD4226 Test Methods for Impact Resistance of Rigi
10、d Poly-(Vinyl Chloride)(PVC)Building ProductsD4756 Practice for Installation of Rigid Poly(Vinyl Chlo-ride)(PVC)Siding and SoffitD5033 Guide for Development ofASTM Standards Relatingto Recycling and Use of Recycled Plastics(Withdrawn2007)3D5947 Test Methods for Physical Dimensions of SolidPlastics S
11、pecimensE631 Terminology of Building ConstructionsE1753 Practice for Use of Qualitative Chemical Spot TestKits for Detection of Lead in Dry Paint Films3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nologies D883,D1600,and E631,unless otherwise specified.3.2 Definitions of Terms
12、 Specific to This Standard:3.2.1 vinyl sofft,na shaped material,made principallyfrom rigid poly(vinyl chloride)(PVC)that is used to clad theunderside of a roof overhang.3.2.2 DiscussionAny exception to a homogeneous rigidPVC compound is present in a coextruded or laminatedcapstock.1This specificatio
13、n is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 1985.Last previous edition approved in 2009 as D4477 09.DOI:10.1520/D4477-16.2
14、For 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.3The last approved version of this historical standard is reference
15、d onwww.astm.org.*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 4.Materials and Manufacture4.1 The soffit,shall be made of one or more layers ofpoly(vinyl chloride)(PVC)com
16、pound.Any layers of materialsother than poly(vinyl chloride)(PVC)compound shall be keptto less than 20%by volume.4.2 Use rigid PVC recycled plastic,as defined in GuideD5033 if all the requirements in the sections on Terminology(Section 3),on Materials and Manufacture(Section 4),and onPhysical Requirements(Section 5)are met by the soffitcontaining PVC recycled plastic.4.3 The poly(vinyl chloride)soffit material,when tested inaccordance with Test Method D635,shall not exceed anaverage extent of bu
