1、Designation: C406/C406M 10Standard Specification forRoofing Slate1This standard is issued under the fixed designation C406/C406M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses in
2、dicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the material characteristics,physical requirements, and sampling appropriate to the selec-tion of slate for use as roof shingles.1.2
3、Slates not included in this specification are those con-taining soft carbonaceous ribbons. The wide variation inphysical properties and composition of such ribbon slatesrender their service life uncertain under some conditions ofuse.1.3 The values stated in either SI units or inch-pound unitsare to
4、be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2C119 Termin
5、ology Relating to Dimension StoneC120/C120M Test Methods of Flexure Testing of Slate(Breaking Load, Modulus of Rupture, Modulus of Elastic-ity)C121/C121M Test Method for Water Absorption of SlateC217/C217M Test Method for Weather Resistance of Slate3. Terminology3.1 DefinitionsDefinitions shall be i
6、n accordance withTerminology C119.3.2 Definitions of Terms Specific to This Standard:3.2.1 service lifea period of time over which the slatematerial is expected to require no repair or replacement due toweathering.3.2.2 ribbonsnarrow bands of carbonaceous material,darker in color than the surroundin
7、g slate. These ribbons areinclusions of the original beds and are softer and less durablethan the surrounding material.4. Classification4.1 Roofing slate shall be classified by grade in accordancewith the physical requirements of Table 1, with the classifica-tion limited to the test specimen thickne
8、ss, or greater thickness,as determined under Test Methods C120/C120M.4.2 When comparing slates of the same grade and equalthickness, but from various sources, slates which meet therequired breaking load at the lowest specimen thickness willyield the best performance on the roof in terms of resistanc
9、e toimpact damage.4.3 Expected service life of the various grades, dependingon geographic location and environmental exposure, is asfollows:Grade Service Life (years)Grade S1over 75Grade S240 to 75Grade S320 to 405. Ordering Information5.1 ColorThe commercial color specified should be pre-ceded by t
10、he words “unfading” or “semi-weathering” or“weathering” to indicate the allowable change in the originalslate color, over time, upon exposure on the roof.5.2 Standard RoofsSloping roofs utilizing a nominalthickness of316 to14 in. 4.8 to 6.4 mm, are known asstandard roofs. These shingles shall be rec
11、tangular unlessotherwise specified. These shingles shall be machine punchedor drilled for two nails located for proper headlap.5.3 Textural RoofsSloping roofs utilizing various sizes,thicknesses, textures, and colors for architectural effects, areknown as textural roofs. These shingles shall be mach
12、inepunched or drilled for two nails located for proper headlap.1This specification is under the jurisdiction of ASTM Committee C18 onDimension Stone and is the direct responsibility of Subcommittee C18.03 onMaterial Specifications.Current edition approved Sept. 1, 2010. Published October 2010. Origi
13、nallyapproved in 1957 as C406 57 T. Last previous edition approved in 2006 asC406 061. DOI: 10.1520/C0406_C406M-10.2For 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 t
14、he standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.4 Graduated RoofsSloping roofs utilizing a greaterrange of sizes, thicknesses, and exposed lengths of shingles,are known as gradu
15、ated roofs. The slates are arranged on theroof so that the thickest and longest occur at the eaves andgradually diminish in size and thickness toward the ridges.These shingles shall be machine punched or drilled for twonails located for proper headlap.6. Physical Requirements6.1 Slate supplied under
16、 this specification shall conform tothe physical requirements listed in Table 1 and be no thinnerthan the thickness of the average of the test samples reportedunder Test Methods C120/C120M.6.2 Slates with broken corners on the exposed ends shall notbe installed when either the base or leg of the rig
17、ht triangularpiece broken off is greater than 112 in. 40 mm. Slates withbroken corners are acceptable for cutting stock.6.3 The curvature of shingles shall not exceed18 in. in 12 in.3 mm in 300 mm. Curved slate shall be sheared and punchedto permit it to be laid with the convex side up.6.4 “Knots” a
18、nd “knurls” are rounded defects, which affectthe smoothness of split. They are acceptable on the exposedportion of the top face but on other parts will prevent closecontact of shingles. Shingles having knots or knurls on thecovered portions projecting in excess of116 in. 1.5 mm shallnot be used if t
19、hey prevent proper fit and contact.6.5 Slate shall be free from ribbons.6.6 Not more than 1 % of broken slates, including thosehaving cracks materially precluding ringing when sounded,shall be accepted.6.7 Face dimensions shall not differ from those specified bymore than18 in. 3 mm.6.8 Slates shall
20、be trimmed with right angle corners, squareto within18 in. in 12 in. 3 mm in 300 mm.7. Sampling7.1 Samples for testing of characteristics and physicalproperties, if required, shall be representative of the slate to beused.ASTM International takes no position respecting the validity of any patent rig
21、hts 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 any
22、 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 comments wi
23、ll 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 by AS
24、TM 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); o
25、r 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/).TABLE 1 Physical RequirementsClassificationBreaking Load,min lbf(or N)AAbsorp-tion, max,%BDepth ofSoftening, max,in. (mm)CGrade S1575 2560 0.25 0.002 0.05Grade S2575 2560 0.36 0.008 0.20Grade S3575 2560 0.45 0.014 0.36ASee Test Methods C120/C120M.BSee Test Method C121/C121M.CSee Test Method C217/C217M.C406/C406M 102
