1、Designation: C 406 06e1Standard Specification forRoofing Slate1This standard is issued under the fixed designation C 406; 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
2、the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTESection 6.1 was revised editorially in December 2006.1. Scope1.1 This specification covers the material characteristics,physical requirements, and sampling appropriate to t
3、he selec-tion of slate for use as roof shingles.1.2 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.2. Referenced D
4、ocuments2.1 ASTM Standards:2C119 Terminology Relating to Dimension StoneC 120 Test Methods of Flexure Testing of Slate (BreakingLoad, Modulus of Rupture, Modulus of Elasticity)C 121 Test Method for Water Absorption of SlateC 217 Test Method for Weather Resistance of Slate3. Terminology3.1 Definition
5、sDefinitions shall be in 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 co
6、lor than the surrounding 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 th
7、e test specimen thickness, or greater thickness,as determined under Test Methods C 120.4.2 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
8、terms of resistance 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
9、 be pre-ceded by the 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 s
10、hingles shall be rectangular 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 sh
11、ingles shall be machinepunched or drilled for two nails located for proper headlap.5.4 Graduated RoofsSloping roofs utilizing a greaterrange of sizes, thicknesses, and exposed lengths of shingles,are known as graduated roofs. The slates are arranged on theroof so that the thickest and longest occur
12、at the eaves andgradually diminish in size and thickness toward the ridges.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 June 1, 2006. Published June 200
13、6. Originallyapproved in 1957 as C 406 57 T. Last previous edition approved in 2005 asC 406 05.2For 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 Documen
14、t Summary page onthe ASTM website.TABLE 1 Physical RequirementsClassificationBreaking Load,min lbf(or N)AAbsorp-tion, max,%BDepth ofSoftening, max,in. (mm)CGrade S1575 (2558) 0.25 0.002 (0.05)Grade S2575 (2558) 0.36 0.008 (0.20)Grade S3575 (2558) 0.45 0.014 (0.36)ASee Test Methods C 120.BSee Test Me
15、thod C 121.CSee Test Method C 217.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.These shingles shall be machine punched or drilled for twonails located for proper headlap.6. Physical Requirements6.1 Slate supplied under this specif
16、ication 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 C 120.6.2 Slates with broken corners on the exposed ends shall notbe installed when either the base or leg of the right triangularpiec
17、e broken off is greater than 112 in. (38 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 305 mm). Curved slate shall be sheared and punchedto permit it to be laid with the convex side up.6.4 “Knots” and “knurls” a
18、re 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 they prevent
19、 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 be trimme
20、d with right angle corners, squareto within18 in. in 12 in. (3 mm in 305 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 rights ass
21、erted 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 time b
22、y 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 will rece
23、ive 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 ASTM Inte
24、rnational, 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).C40606e12
