1、Designation: D6777 02 (Reapproved 2010)1An American National StandardStandard Test Method forRelative Rigidity of Poly(Vinyl Chloride)(PVC) Siding1This standard is issued under the fixed designation D6777; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 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.1NOTEReapproved with editorial changes throughout in November 2010.1. Scope*1.1 This procedure
3、describes a method to determine anumerical value indicating the relative rigidity or stiffness ofvinyl siding panels. This procedure is not intended for routinequality control inspection during the manufacture of vinylsiding. The rigidity of vinyl siding is believed to be controlledprimarily by its
4、configuration and is not believed to besignificantly influenced by manufacturing variables.1.2 Vinyl siding with higher rigidity is often easier to handleand install. It is expected to provide a straighter appearancewhen installed on walls having an uneven surface.1.3 All other vinyl siding requirem
5、ents and test methods canbe identified through Specification D3679.1.4 There is no known ISO equivalent to this standard.1.5 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-p
6、riate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating toPlasticsD367
7、9 Specification for Rigid Poly(Vinyl Chloride) (PVC)SidingD5947 Test Methods for Physical Dimensions of SolidPlastics Specimens3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D883 and D1600 unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2
8、.1 relative rigidity (of PVC siding)stiffness of a pieceof vinyl siding.3.2.2 rigidity index (of PVC siding)amount of sample sagor deflection relative to sample length. The “rigidity index” isdefined as 100 minus the deflection value, divided by thesample length, expressed as a percentage.4. Summary
9、 of Test Method4.1 In this procedure the test specimen is a piece of vinylsiding 100 in. long. This specimen is placed on top of a leveltable with 50 in. of the specimen extending unsupported pastthe edge of the table, allowing the specimen to sag under itsown weight. The amount of sag that occurs i
10、s used to calculatea rigidity index for the sample.5. Significance and Use5.1 Vinyl siding with higher rigidity is often easier to installand expected to provide a straighter appearance when installedon walls having an uneven surface.5.2 The rigidity of vinyl siding is believed to be controlledprima
11、rily its characteristic configuration and is not believed tobe significantly influenced by manufacturing variables. Sidingweight has little influence on this test.6. Interferences6.1 The supporting table and floor must be parallel and levelwith each other. Calibrations of flatness and levelness, asd
12、escribed in 9.2-9.4 shall be performed before running this test.7. Apparatus7.1 This procedure requires a table that is flat and level. Thetable must be at least 50 in. long and at least as wide as the1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct resp
13、onsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved Nov. 15, 2010. Published March 2011. Originallyapproved in 2002. Last previous edition approved in 2002 as D6777 - 02.DOI:10.1520/D6777-02R10E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org
14、, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C7
15、00, West Conshohocken, PA 19428-2959, United States.widest test specimen to be measured. The height of the table isnot critical. The edge of the table over which the specimen willextend shall not have a radius more than 0.125 in. The tablemust be positioned on a hard surface or floor (no carpet) tha
16、t isalso flat and level over a length extending at least 50 in. fromthe edge of the table.7.2 Aweight consisting ofa5lbsand bag is used to hold theend of the siding specimen firmly against the table top. Theweight shall be as wide as the widest siding specimen to betested.7.3 A line shall be drawn o
17、n the table to ensuring that thespecimens are positioned perpendicular to the edge of the table.This line shall be drawn as a perpendicular to the edge using alarge framing square at least 10 in. on each side.7.4 A rigid ruler (such as a folding carpenters ruler or largemetal framing square) is used
18、 to measure the distance from thefloor to the table top and the suspended end of the sidingspecimen. This ruler needs to be at least one inch longer thanthe height of the table, and shall be scribed to allow measure-ments to the nearest116 in.NOTE 1It is recommended that the end of the ruler being p
19、lacedagainst the floor be protected with a cap to prevent abrasive wear.7.5 A tape measure is used to measure the length of thesiding specimen. This tape measure needs to be at least 101 in.long, and shall be scribed to allow measurements to the nearest116 in.8. Sampling, Test Specimens, and Test Un
20、its8.1 The test specimen shall be taken from a vinyl sidingpanel complying with Specification D3679. The siding panel astested shall be complete with any weep holes or nail slots asrequired for installation per the manufacturers design. Thespecimen shall be cut to a length of 100 6 0.25 in. as measu
21、redaccording to the procedure in Specification D3679 section 6.3.The specimen shall be cut so that there are no notches on theend which will extend off the table. Both ends of the specimenshall be cut squarely, being no more than18 in. out of squareacross the width of the specimen.9. Calibration and
22、 Standardization9.1 Calibrations of flatness and levelness as described in9.2-9.4 shall be performed before running the test.9.2 The flatness of the floor and table shall each be verifiedusing a straightedge at least 50 in. long. At no point shall thetable top or floor deviate more than 0.20 in. fro
23、m the surface ofthe straightedge.9.3 A spirit level, at least 50 in. long shall be used to verifythat the table and floor are each level. Over the length of thespirit level, a deviation of less than 0.2 in. is consideredinsignificant.9.4 After verifying the flatness and level of both the tableand th
24、e floor, verify them in combination. Place a straightedge96 to 100 in. long on the table so that 50 in. of the straightedgeextends perpendicular over the table edge. Place the weightfrom 7.2 on the table end of the straightedge to hold it flat.Measure the distance from the straightedge to the floor
25、at twopoints: at the unsupported end of the straightedge and imme-diately adjacent to the table edge. These two measurementsshall not differ by more than 0.20 in.9.5 If necessary to correct the level of the table, shims canbe permanently attached to the bottom of the table legs.10. Conditioning10.1
26、Prior to testing, condition the test specimen for aminimum of 24 h at a temperature of 73.4F 6 3.6 (20C 6 2).During conditioning the specimen shall rest on a flat surfacethat supports the specimen over its entire length.11. Procedure11.1 Select one (unnotched) end of the specimen to be theend that w
27、ill extend off the table. Label this end of thespecimen to avoid subsequent confusion about which end is tobe unsupported. Using a tape measure, make a mark 50 6116in. from this unsupported end.11.2 Place the specimen face up (the face is the side that isexposed after installation) on the table so t
28、hat the specimen isperpendicular to the edge of the table (parallel to the perpen-dicular line drawn on the table) and with the 50 in. markdirectly over the table edge.11.3 Place the weight described in 7.2 on the supported endof the specimen (the end on the table). The edge of the weightfurthest fr
29、om the supported end shall be 6 6 0.5 in. from thesupported end (see Fig. 1). The weight shall cover the entirewidth of the specimen.After positioning the weight verify onceagain that the position of the specimen is as described in 11.2.The panel shall be allowed to bow upwards between the weightand
30、 the table edge.11.4 Three minutes 6 15 seconds after positioning thesample as described above, measure the distance from theunsupported end of the specimen to the floor. Make onemeasurement at each edge of the specimen. Each measurementshall be from the floor to a portion on the panel cross-section
31、that is in contact with the table. These measurements shall bemade with a rigid ruler maintained perpendicular to the floor,to the nearest116 in. Average these two values and record thisaverage as the “mean specimen height.”11.5 Run three replicates and average the three “meanspecimen height” values
32、.11.6 Use the ruler to measure to the nearest116 in. thedistance from the table top to the floor, adjacent to the edgewhere the specimen extends. Record this “table height” value.12. Calculation or Interpretation of Results12.1 Subtract the average of the three “mean specimenheights” from the “table
33、 height” to obtain the “sample deflec-tion.”12.2 Subtract the “sample deflection” from 100 to obtain the“rigidity index.” Report the “rigidity index” and all individualmeasurements, along with an identification of the sample.NOTE 2The “rigidity index” expresses the sample sag relative to thesample l
34、ength. The “rigidity index” is defined as 100 minus the deflectionvalue, divided by the sample length, expressed as a percentage. Due to thesample length designated in this procedure, the “percent rigidity” simpli-fies to 100 minus the deflection value in inches, as shown below.D6777 02 (2010)12100
35、3100 2 deflection!specimen length5 100 3100 2 deflection!1005 100 2 deflection13. Report13.1 The report shall include the following:13.1.1 Complete identification of sample tested,13.1.2 Mean specimen height values and their average,13.1.3 Table height,13.1.4 Sample deflection, and13.1.5 Rigidity in
36、dex.14. Precision and Bias14.1 Table 1 is based on an interlaboratory study conductedin 2000 involving 15 materials tested by seven laboratories.Similar commercial materials were received from severalmajor siding producers, and coded by the organizing lab. Allmaterials were tested by each laboratory
37、 in an as receivedcondition.14.1.1 In Table 1 for the materials indicated, mean valueswere derived from triplicate determinations.14.1.2 Sr is the within laboratory standard deviation of themean. r is the within laboratory critical interval between twotest results and r = 2.83 Sr.14.1.3 SR is the be
38、tween laboratory standard deviation ofthe mean. R is the between laboratory critical interval betweentest results and R = 2.83 SR.NOTE 3The explanations of r and R are only intended to present ameaningful way of considering the approximate precision of this testmethod. The data in Table 1 should not
39、 be applied to acceptance ofrejection of materials as these data apply only to the materials tested in theround robin and may not be representative of other lots or formulations.Users of this test method should apply the principles outlined in E691 toFIG. 1 Testing Apparatus for Rigidity of Vinyl Si
40、dingTABLE 1 Precision and Bias DataMaterials Mean Sr SR r RD4DL1 91.68 0.44 0.74 1.25 2.09D5H1 93.51 0.29 0.73 0.82 2.07D5H2 85.84 0.74 0.90 2.09 2.55D5V1 94.08 0.67 0.89 1.90 2.52D4DL2 92.16 0.29 0.79 0.82 2.24D5H3 93.34 0.48 0.84 1.36 2.38D5V2 86.32 0.28 0.94 0.79 2.66D4DL2 90.85 0.26 0.80 0.74 2.
41、26D4DL3 96.12 0.10 0.63 0.28 1.78D4DL4 92.85 0.10 0.75 0.28 2.12D5H3 87.71 0.84 1.25 2.38 3.54D5V3 91.07 0.20 0.68 0.57 1.92D4DL2 91.48 0.15 0.71 0.42 2.01D5H3 96.01 0.38 0.71 1.08 2.01D5L1 91.17 0.19 0.99 0.54 2.80D6777 02 (2010)13generate data specific to their materials and laboratory.14.2 BiasSi
42、nce no absolute test method exists for com-parison, no bias statement can be presented for this testmethod.15. Keywords15.1 PVC siding; rigidity; rigidity indexSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue (D6777 - 02)that may i
43、mpact the use of this standard. (November 15, 2010)(1) Cleaned up language in 1.2 and 5.1.(2) Removed non-mandatory language in 5.2.(3) Removed recommendation from 7.4. Inserted this text asNote 1. Renumbered subsequent notes.ASTM International takes no position respecting the validity of any patent
44、 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 revision at
45、 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. Your comment
46、s 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 copyrighted b
47、y 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/).D6777 02 (2010)14
