1、Designation: C933 13Standard Specification forWelded Wire Lath1This standard is issued under the fixed designation C933; 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 t
2、he 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 a
3、nd 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:2A641/A641M Specification
4、 for ZincCoated (Galvanized)Carbon Steel WireC11 Terminology Relating to Gypsum and Related BuildingMaterials and Systems2.2 Federal Specifications:UU-B-790 Building Paper, Vegetable Fiber: (Kraft,Waterproofed, Water Repellent and Fire Resistant)33. Terminology3.1 Definitions of terms used in this s
5、tandard 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 A641/A641M.4.1.1 Diameter tolerance for galvanized wire shall be inaccordance
6、 with Specification A641/A641M.4.1.2 The wire shall be zinc-coated (galvanized) in accor-dance with Specification A641/A641M.4.1.3 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 l
7、essthan that required to maintain integrity under normal hand- ormachine-application pressures.4.1.4 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
8、 not less than one mesh at ends andedges and shall permit full embedment, in not less than14 in.(6 mm) of plaster, of not less than one-half of the total lengthand width of the wire.4.1.5 The thickness of the embedment of the lath and plastershall be measured from the back plane of the back wire,exc
9、lusive 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 welded at all intersections of wire toform openings not more than 2 in. (51 mm) by 2 in. (51 mm).5.1.2 Reinforced lath shall be permitted to be reinfo
10、rcedcontinuously and parallel to the long dimension of the lath atintervals of not more than 6 in. (150 mm). Wires used for thispurpose shall range from 0.072 in. (1.9 mm) to 0.1205 in. (3.1mm). Reduction of the size of the openings to less than 2 in.(51 mm) by 2 in. (51 mm) shall also be permitted.
11、5.1.3 Self-furring crimps on self-furring lath shall projectnot less than14 in. (6 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
12、be 28 in. (700 mm) to54 in. (1370 mm), with a permissible variation of 634 in. (19mm).5.4 LengthThe minimum length shall be 48 in. (1200 mm)for sheets or a maximum of 150 ft (45.720 m) for rolls with apermissible variation of 634 in. (19 mm) for sheets or rolls.1This specification is under the juris
13、diction 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 approved May 1, 2013. Published June 2013. Originallyapproved in 1980. Last
14、previous edition approved in 2011 as C933 11. DOI:10.1520/C0933-13.2For 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 Document Summary page onthe ASTM we
15、bsite.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.*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
16、. United States15.5 WeightThe weight, exclusive of backing, shall be aminimum of 1.14 lb/yd2(0.618 kg/m2). The weight of rein-forced lath, exclusive of backing, shall be a minimum of 1.95lb/yd2(1.058 kg/m2).6. Sampling6.1 When specified by the purchase agreement, samples ofwelded wire lath shall be
17、taken at the place of manufacture orat the place of destination. If 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 sosele
18、cted as to be representative of the shipment and shallconstitute a 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 Rejec
19、tion of welded wire lath that fails to conform to therequirements of 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 specificat
20、ion.9. Packaging and Package Marking9.1 Welded wire lath shall be packaged 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 AST
21、M 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 lath; metal plaster base; plaster; self-furrin
22、g lath;stucco; wire lathSUMMARY OF CHANGESCommittee C11 has identified the location of selected changes to this specification since the last issue,C933 11, that may impact the use of this specification. (Approved May 1, 2013)(1) Revised paragraph 5.1.2. (2) Revised paragraph 5.5.ASTM International t
23、akes no position respecting the validity 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
24、responsibility.This standard is subject 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 addr
25、essed to ASTM International Headquarters. 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
26、the address shown below.This standard 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C933 132
