1、Designation:C84710a Designation: C847 12Standard Specification forMetal Lath1This standard is issued under the fixed designation C847; 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 parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers sheet lath, expanded metal lath, diamond mesh,
3、 flat and self-furring, and rib metal lath,18 and38in. (3.2 and 9.6 mm), all with or without backing and designed to be used as a base for gypsum or portland cement plaster.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconve
4、rsions to SI units that are provided for information only and are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by theHot-Dip Process3. Material3.1 Metal lath shall be fab
5、ricated from cold-rolled carbon steel sheet of commercial quality conforming to SpecificationA653/A653M. Galvanized metal lath shall have a G60 coating in accordance with Specification A653/A653M.3.2 Backing shall be attached to the lath sufficiently enough to prevent accidental removal during shipp
6、ing, handling, orinstallation.Attachment of backing shall also allow lapping of metal to metal and backing to backing, 1 in. (25.4 mm) on the endsand12 in. (12.7 mm) on the sides.4. Dimensions, Mass, and Permissible Variations4.1 ThicknessThe nominal thickness of diamond mesh and flat rib metal lath
7、 shall be18 in. (3.2 mm). The nominal thicknessof other rib metal lath shall be as designated,38 in. (9.6 mm). The nominal thickness of self-furring diamond mesh shall be516in. (7.9 mm).4.2 WidthThe minimum width of metal lath shall be 27 in. (686 mm).4.3 LengthThe minimum length of metal lath shall
8、 be 97 in. (2464 mm).4.4 WeightThe nominal weight of metal lath shall be as follows:4.4.1 U.S. Nominal WeightsU.S. Weights:Type: Weight, lb/yd2(kg/m2)Diamond mesh 2.5 (1.4); 3.4 (1.8)Flat rib 1.8 (1.0); 2.75 (1.5); 3.4 (1.8)38-in. rib 3.4 (1.8); 4.0 (2.1)4.4.2 Canadian Nominal Weights:Type: Weight,
9、lb/yd2(kg/m2)Diamond mesh 2.5 (1.4); 3.0 (1.6); 3.4 (1.8)Flat rib 1.8 (1.0); 2.5 (1.4); 3.0 (1.6)38-in. rib 3.0 (1.6); 3.5 (1.9); 4.0 (2.1)4.5 Permissible VariationsThe permissible variations shall be as follows:1This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Relate
10、d Building Materials and Systems and is the direct responsibility ofSubcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.Current edition approved Oct.April 1, 2010.2012. Published November 2010.May 2012. Originally approved in 1977. Last previous edition approv
11、ed in 2010 as C84710a.DOI: 10.1520/C0847-10a. 10.1520/C0847-12.2For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website
12、.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior e
13、ditions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-
14、2959, United States.4.5.1 Thickness, 6164 in. (0.4 mm).4.5.2 Width, 638 in. (9.5 mm).4.5.3 Length,0in.,+112 in. (38.1 mm).4.5.4 Weight, 6 10 %.5. Finish5.1 Metal lath shall be fabricated from hot-dipped galvanized steel.6. Weight Test6.1 Significance and UseThis test method provides a procedure for
15、measuring the weight of a single sheet of metal lath. Itshall be used to determine compliance with this specification. The degree of performance of this test method with serviceperformance has not been determined.6.2 Apparatus:6.2.1 Scale, capable of weighing in increments of 0.1 lb (0.05 kg) or 1 o
16、z (28 g).6.2.2 Tape Measure, capable of measuring in increments of116 in (1.6 mm).6.3 Materials shall satisfy the following:6.3.1 Metal LathSpecification C847.6.4 SamplingOne sheet shall be selected from each bundle or package, but not more than five sheets from any one shipmentfor testing.6.5 Speci
17、men Preparation:6.5.1 Measure and record the width and length of each specimen.NOTE 1For paper-backed lath, remove the paper and glue from the lath before weighing the specimen.6.5.2 Each specimen to be weighed shall be permitted to be folded.6.6 Procedure:6.6.1 Attach the scale to a suitable suppor
18、t and tare the scale to zero.6.6.2 Attach the specimen to the scale.6.6.3 Record the weight of the specimen.6.6.4 Calculate the number of square yards of material present in each specimen.NOTE 2The number of square yards per specimen is determined by taking the area of the specimen in square inches
19、(square mm) and dividing thearea by 1296 in2/yd2(995 389 mm2/m2).6.6.5 Calculate the weight per square yard for each specimen.NOTE 3The weight per square yard is determined by dividing the weight per specimen by the number of square yards of each specimen.6.7 Number of Tests and Retests:6.7.1 A samp
20、le consisting of five specimens of each type of lath shall be tested. If more than two specimens fail, the samplehas failed to meet the requirements of this test.6.7.2 If one of the five test specimens fails to meet the requirements, two more additional test specimens shall be chosen forretesting. I
21、f not more than one of the two additional test specimens fail, the sample has met the requirements of this test.6.7.3 If more than one of the test specimens fails, the sample has failed to meet the requirements of the test.6.8 ReportReport shall indicate the total number of specimens tested and the
22、number of specimens meeting the requirementsof this specification.6.9 Precision and BiasNo statement is made about either the precision or bias of this test method since the result merely stateswhether or not there is conformance to the criteria for success specified in the procedure.7. Inspection7.
23、1 Inspection of the material shall be agreed upon between the purchaser and supplier as part of the purchase contract.8. Rejection and Rehearing8.1 Any rejection shall be based upon the specific cause of failure to conform to the requirements of this specification, and shallbe reported to the seller
24、 within 10 working days from the receipt of the shipment by the purchaser.8.2 Claims for rehearing shall be valid only if made within 20 working days from receipt of notice of specific cause for rejection.9. Certification9.1Where9.1 Where specified in the purchase order, a producers or suppliers cer
25、tification shall be furnished to the purchaserthat the material was manufactured in accordance with this specification and has been found to meet the specified requirements.10. Packaging and Package Marking10.1 Metal lath shall be packaged ten sheets per bundle, and self-furring lath shall be five o
26、r ten sheets per bundle (option ofmanufacturer).C847 12210.2 When shipped for resale, the name of the manufacturer or the supplier and the brand shall be legibly marked on each lathor package.11. Keywords11.1 gypsum cement plaster; lath; metal lath; portland cement plaster; rib lath; self-furring; s
27、heet lathSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C84710a, that may impact the use of this specification. (Approved October 1, 2010)April 12, 2012)(1) Revised 4.5.3.(2) Revised 9.1.Committee C11 has identified the loca
28、tion of selected changes to this specification since the last issue,C84709, that may impact the use of this specification. (Approved May 1, 2010)(1) Revised 4.2, 4.3, and 4.5.3.(2) Deleted Sheet lath4.5 lb/yd2fromThe term nominal was removed from 4.4, 4.4.1.(3) Added new Section 6.C847 123Committee
29、C11 has identified the location of selected changes to this specification since the last issue,C84706, that may impact the use of this specification. (Approved May 1, 2009)(1) Revised the tolerance in 4.5.2 from316 in. to38 in. , and 4.4.2.ASTM International takes no position respecting the validity
30、 of any patent 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
31、to revision at 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
32、. Your comments 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
33、 copyrighted by 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/).C847 124
