1、Designation: C 933 09Standard Specification forWelded Wire Lath1This standard is issued under the fixed designation C 933; 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.1. Scope*1.1 This specification covers welded wire lath, flat orself-furring, with or without backing, designed for use as a baseto receive portland cement-based interior plaster
3、 and exteriorstucco.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A 641/A 641M Specifica
4、tion for ZincCoated (Galvanized)Carbon Steel WireC11 Terminology Relating to Gypsum and Related Build-ing Materials and Systems2.2 Federal Specifications:UU-B-790 Building Paper, Vegetable Fiber: (Kraft, Water-proofed, Water Repellent and Fire Resistant)33. Terminology3.1 Definitions of terms used i
5、n this standard shall be inaccordance with Terminology C11.4. Materials and Manufacture4.1 Welded wire lath shall be fabricated from not less than0.0625 in. (1.588 mm), cold-drawn, galvanized steel wire,conforming to Specification A 641/A 641M.4.1.1 The wire shall be zinc-coated (galvanized) in acco
6、r-dance with Specification A 641/A 641M.4.1.2 The backing shall conform to Federal SpecificationUU-B-790. The backing shall be either absorptive or waterresistant. The backing shall have a bursting strength of not lessthan that required to maintain integrity under normal hand- ormachine-application
7、pressures.4.1.3 The backing shall be attached to the lath to preventaccidental removal during shipping, handling or installation.Attachment of the backing shall allow lapping of wire-to-wireand backing-to-backing of not less than one mesh at ends andedges and shall permit full embedment, in not less
8、 than14 in.(6 mm) of plaster, of not less than one-half of the total lengthand width of the wire.4.1.4 The thickness of the embedment of the lath and plastershall be measured from the back plane of the back wire,exclusive of furring, to the backing or surface of the substrate.5. Dimensions and Permi
9、ssible Variations5.1 Openings and Stiffening:5.1.1 Lath shall be welded at all intersections of wire toform openings not more than 2 in. (51 mm) by 2 in. (51 mm).5.1.2 Heavy-duty lath shall be stiffened continuously andparallel to the long dimension of the lath at intervals of notmore than 6 in. (15
10、2 mm). Wire stiffeners used for this purposeshall range from 15-gauge (0.072 in.) to 11-gauge (0.1205 in.).The weight per square yard shall range from 1.14 to 1.95lb/yd2(0.618 to 1.058 kg/m2) for the heavy-duty lath.5.1.3 Self-furring crimps on self-furring lath shall projectnot less than14 in. (6.4
11、 mm) from the plane of the back of thelath.5.2 ThicknessThe nominal thickness shall be18 in. (3.2mm), exclusive of self-furring crimps, with a permissiblevariation of 6132 in. (0.8 mm).5.3 WidthThe nominal width shall be 28 in. (710 mm) to54 in. (1370 mm), with a permissible variation of 634 in. (19
12、mm).5.4 LengthThe minimum length shall be 48 in. (1220mm) for sheets or a maximum of 150 ft (45.720 m) for rollswith a permissible variation of 634 in. (19 mm) for sheets orrolls.5.5 WeightThe nominal weight, exclusive of backing,shall be from 1.14 to 1.95 lb/yd2(0.618 to 1.058 kg/m2).Permissible va
13、riation in percentage over and under the nominalweights shall be in accordance with mill tolerances.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Tes
14、t Methods for Accessories andRelated Products.Current edition approved July 15, 2009. Published August 2009. Originallyapproved in 1980. Last previous edition approved in 2007 as C 933 07b.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servic
15、eastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1*A Summary of Changes section appears at
16、 the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Sampling6.1 When specified by the purchase agreement, samples ofwelded wire lath shall be taken at the place of manufacture orat the place of destination. If
17、 samples are taken at thedestination, such samples shall be taken within 24 h of thereceipt of the material.6.2 At least 0.25 % of the number of sheets of welded wirelath in a shipment, but not less than three sheets, shall be soselected as to be representative of the shipment and shallconstitute a
18、sample for the purpose of tests by the purchaser oruser.7. Inspection7.1 Inspection of the welded wire lath shall be agreed uponbetween the purchaser and the producer or supplier as part ofthe purchase agreement.8. Rejection8.1 Rejection of welded wire lath that fails to conform to therequirements o
19、f the specification shall be reported to theproducer or supplier promptly and in writing. The notice ofrejection shall contain a statement documenting how thewelded wire lath has failed to conform to the requirements ofthe specification.9. Packaging and Package Marking9.1 Welded wire lath shall be p
20、ackaged in bundles or rolls.9.2 Unless otherwise required by the purchase agreement,lath shall have legibly marked thereon the following: theproduct description; the name of the producer or seller; thebrand name (if any); and the ASTM designation for theproduct.9.2.1 Each bundle or roll of lath with
21、 no backing shall bemarked with metal or paper tags securely attached to thebundles or rolls.9.2.2 Each sheet of lath with backing shall be marked on thebacking material.10. Keywords10.1 lath; metal plaster base; plaster; self-furring lath;stucco; wire lathSUMMARY OF CHANGESCommittee C11 has identif
22、ied the location of selected changes to this specification since the last issue,C 933 07b, that may impact the use of this specification. (Approved July 15, 2009)(1) Revised 4.1.3 to change the embedment depth from18 in.to14 in.ASTM International takes no position respecting the validity of any pate
23、nt 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
24、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. Your comme
25、nts 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
26、 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).C933092
