1、Designation: C 933 07aStandard 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 indicate
2、s the year of last reapproval. Asuperscript epsilon (e) 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 plast
3、er and exteriorstucco.1.2 The values stated in inch-pound units are to be regardedas the standard. The SI (metric) values given in parentheses arefor information only.2. Referenced Documents2.1 ASTM Standards:2A 641/A 641M Specification for ZincCoated (Galvanized)Carbon Steel WireC11 Terminology Rel
4、ating 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 in this standard shall be inaccordance with Terminology C11.4. Materi
5、als 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 accor-dance with Specification A 641/A 641M.4.1.2 The backing shall conf
6、orm 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 pressures.4.1.3 The backing shall be attached to the lath to prevent
7、accidental 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 than18 in.(3.2 mm) of plaster, of not less than one-half of the tot
8、al 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 Permissible Variations5.1 Openings and Stiffening:5.1.1 Lath shall be w
9、elded 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. (152 mm). Wire stiffeners used for this purposeshall range from 15-ga
10、uge (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 mm) from the plane of the back of thelath.5.2 ThicknessThe nomina
11、l 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. (19mm).5.4 LengthThe nominal length shall be 96 in. (2440 mm)or 104 i
12、n. (2640 mm) for sheets or a maximum of 150 ft(45.720 m) for rolls with a permissible variation of 634 in. (19mm).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 variation in percentage over and under the nominalweights shall be
13、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 Test Methods for Accessories andRelated Products.Current edition app
14、roved Aug. 1, 2007. Published August 2007. Originallyapproved in 1980. Last previous edition approved in 2007 as C 933 07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, ref
15、er 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 the end of this standard.Copyright ASTM International, 100 Barr Ha
16、rbor 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 samples are taken at thedestination, such samples shall be taken w
17、ithin 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 sample for the purpose of tests by the purchaser oruser.7. Inspecti
18、on7.1 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 of the specification shall be reported to theproducer or supplier pr
19、omptly 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 packaged in bundles or rolls.Nominal 96 in. (2440 mm) lengths shall
20、be packaged with 12sheets 25 yd2(21 m2) per bundle; nominal 48 in. (1220 mm)lengths shall be packaged with 19 sheets 20 yd2(17 m2) perbundle.9.2 Unless otherwise required by the purchase agreement,lath shall have legibly marked thereon the following: theproduct description; the name of the producer
21、or seller; thebrand name (if any); and the ASTM designation for theproduct.9.2.1 Each bundle or roll of lath with 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
22、lath; metal plaster base; plaster; self-furring lath;stucco; wire lathSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C 933 07, that may impact the use of this specification. (Approved August 1, 2007)(1) Revised paragraphs 5.
23、1.2 and 5.5.Committee C11 has identified the location of selected changes to this specification since the last issue,C 933 05, that may impact the use of this specification. (Approved July 1, 2007)(1) Revised paragraphs 5.3, 5.4, 9.1, and 9.2.1.ASTM International takes no position respecting the val
24、idity 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 sub
25、ject 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 Headqua
26、rters. 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 standa
27、rd is 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).C 933 07a2
