1、Designation: C847 14C847 14aStandard 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 parentheses indicates
2、 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 U.S. Department of Defense.1. Scope*1.1 This specification covers sheet lath, expanded metal lath, diamond mesh, flat a
3、nd self-furring, and rib metal lath, 18 and 38in. (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 mathematicalconversion
4、s 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 fabricat
5、ed 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 shipping,
6、handling, orinstallation. Attachment of backing shall also allow lapping of metal to metal and backing to backing, 1 in. (25.4 mm) on the endsand 12 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 sh
7、all be 18 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 be 516in. (7.9 mm).4.2 WidthThe minimum width of metal lath shall be 27 in. (686 mm).27 in. (686 mm).4.3 LengthThe minimum length of
8、metal lath shall be 97 in. 97 in. (2464 mm).4.4 WeightThe weight of metal lath shall be as follows:4.4.1 U.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 Weights:Type: Weight, lb/yd2 (kg/m
9、2)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)1 This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility ofSubcommittee C1
10、1.02 on Specifications and Test Methods for Accessories and Related Products.Current edition approved June 1, 2014Nov. 1, 2014. Published July 2014November 2014. Originally approved in 1977. Last previous edition approved in 20122014 asC847C847 14.12. DOI: 10.1520/C0847-14.10.1520/C0847-14A.2 For re
11、ferencedASTM 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.This document is not an ASTM standard and is intended only to provide
12、 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 editions as appropriate. In all cases only the current versionof the sta
13、ndard as published by ASTM is to be considered the official document.*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 States14.5 Permissible VariationsThe permissible variations
14、 shall be as follows:4.5.1 Thickness, 6164 in. (0.4 mm).4.5.2 Width, 60 in., +38 in. (9.5 mm).4.5.3 Length, 0 in., + 1in., +112 in. (38.1 mm).4.5.4 Weight, 6 10 %.610 %.5. Finish5.1 Metal lath shall be fabricated from hot-dipped galvanized steel.6. Weight Test6.1 Significance and UseThis test method
15、 provides a procedure for 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
16、of 0.1 lb (0.05 kg) or 1 oz (28 g).6.2.2 Tape Measure, capable of measuring in increments of 116 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 s
17、hipmentfor testing.6.5 Specimen 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 th
18、e scale to a suitable support 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 th
19、e specimen in square inches (square mm) and dividing thearea by 1296 in.2/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
20、Tests and Retests:6.7.1 A sample 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 s
21、hall be chosen forretesting. If 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 numbe
22、r of specimens tested and the 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 i
23、n the procedure.7. Inspection7.1 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
24、 shallbe reported to the seller within 10ten 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.C847 14a29. Certification9.1 Where specified in the purchase
25、order, a producers or suppliers certification shall be furnished to the purchaser that thematerial was manufactured in accordance with this specification and has been found to meet the specified requirements.10. Marking and Identification10.1 Each bundle of metal lath shall be labeled with a tag, ba
26、nd, or label with the following information:10.1.1 The manufacturers identification (that is, name, logo or initials).10.1.2 Lath weight (pounds per square yard) (kilogram/meter squared).10.1.3 Meets Specification C847.10.2 Where color-coding of tags, banding, or labeling of like members is employed
27、 the color-coding of either the backgroundcolor or the lettering used shall be as indicated inTable 1.11. Packaging and Package Marking11.1 Metal lath shall be packaged ten sheets per bundle, and self-furring lath shall be packaged five or ten sheets per bundle(option of manufacturer).11.2 When ship
28、ped for resale, the name of the manufacturer or the supplier and the brand shall be legibly marked on each lathor package.12. Keywords12.1 gypsum cement plaster; lath; metal lath; portland cement plaster; rib lath; self-furring; sheet lathSUMMARY OF CHANGESCommittee C11 has identified the location o
29、f selected changes to this standard since the last issue(C847C847 14-12) that may impact the use of this standard. (Approved Nov. 1, 2014June 1, 2014.).)(1) Added newRevised subsection 4.5.2Section 10(2) Added newRenamed Section 11Table 1(3) Removed subsection 11.2.Committee C11 has identified the l
30、ocation of selected changes to this standard since the last issue (C847 12)that may impact the use of this standard. (Approved June 1, 2014.)(1) Added new Section 10.(2) Added new Table 1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with an
31、y 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 by the responsible technical
32、 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 receive careful consideration at
33、 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 International, 100 Barr Harbor D
34、rive, 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Color CodesLath Weightlb/yd2 (kg/m2) Color2.5 lb/yd2 (1.4 kg/m2) Blue3.4 lb/yd2 (1.8 kg/m2) RedC847 14a3
