1、Designation: C1861 18Standard Specification forLathing and Furring Accessories, and Fasteners, for Interiorand Exterior Portland Cement-Based Plaster1This standard is issued under the fixed designation C1861; the number immediately following the designation indicates the year oforiginal adoption or,
2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification contains the minimum requirementsfor lathing and furring acc
3、essories, and fasteners, as compo-nents of interior and exterior portland cement-based plasterassemblies, used to facilitate lathing and furring installation(Specifications C1063, C1787), cement plaster application(Specification C926), and functionality of the completed stuccocladding assembly1.2 Th
4、e 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.1.3 This international standard was developed in accor-dance with internationally recognize
5、d principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification
6、for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for PressureVessels and for General ApplicationsA580/A580M Specification for Stainless Steel WireA641/A641M Specification for ZincCoated (Galvanized)Carbon Steel WireA653/A653M Specification for Steel Sheet, Zinc-Coated(Galvani
7、zed) or Zinc-Iron Alloy-Coated (Galvannealed)by the Hot-Dip ProcessB69 Specification for Rolled ZincB221 Specification for Aluminum and Aluminum-Alloy Ex-truded Bars, Rods, Wire, Profiles, and TubesC926 Specification for Application of Portland Cement-Based PlasterC954 Specification for Steel Drill
8、Screws for theApplicationof Gypsum Panel Products or Metal Plaster Bases to SteelStuds from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) inThicknessC1002 Specification for Steel Self-Piercing Tapping Screwsfor Application of Gypsum Panel Products or MetalPlaster Bases to Wood Studs or Steel StudsC1063
9、 Specification for Installation of Lathing and Furringto Receive Interior and Exterior Portland Cement-BasedPlasterC1787 Specification for Installation of Non Metallic PlasterBases (Lath) Used with Portland Cement Based Plaster inVertical Wall ApplicationsD1784 Specification for Rigid Poly(Vinyl Chl
10、oride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) CompoundsD4216 Specification for Rigid Poly(Vinyl Chloride) (PVC)and Related PVC and Chlorinated Poly(Vinyl Chloride)(CPVC) Building Products CompoundsF1667 Specification for Driven Fasteners: Nails, Spikes, andStaples3. Terminology3.1
11、 Definitions:3.1.1 Definitions shall be in accordance with SpecificationC1063.3.2 Definitions of Terms Specific to This Standard:3.2.1 capture flange, nthe narrow flange element of alathing accessory that projects from a ground and returns ontothe exterior stucco cladding surface to conceal the gap
12、betweenthe ground and stucco cladding.3.2.2 cement plaster panel area, nthe surface of a cementplaster area between lathing accessory grounds.3.2.3 drainage surface, nthe sloped or non-sloped, perfo-rated or non-perforated surface element of a lathing accessorythat facilitates a drainage function, b
13、y directing water frombehind the stucco cladding to the exterior of the stuccocladding.1This test method is under the jurisdiction ofASTM Committee C11 on Gypsumand Related Building Materials and Systems and is the direct responsibility ofSubcommittee C11.02 on Specifications and Test Methods for Ac
14、cessories andRelated Products.Current edition approved April 15, 2018. Published April 2018. Originallyapproved in 2017. Last previous edition approved in 2017 as C1861 17. DOI:10.1520/C1861-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at s
15、erviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*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. Un
16、ited StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barrie
17、rs to Trade (TBT) Committee.13.2.4 drip flange, nthe narrow flange element of a lathingaccessory that facilitates a drainage function, projects from adrainage surface and directs water to the exterior of the stuccocladding.3.2.5 fastener, na nail, screw, staple or power actuatedfastener.3.2.6 flexib
18、le pleat, nthe flexible element of a control jointlathing accessory that accommodates movement of the cementplaster cladding assembly caused by shrinkage and thermalvariations.3.2.7 ground, nthe element of a lathing accessory thatprovides an edge, end, or termination for a cement plaster panelarea,
19、with a ground dimension to assist in cement plasterthickness control.3.2.8 key attachment flange, nthe attachment flange ele-ment of a lathing accessory that is full of holes or is expandedsheet metal that provides a means for accurate alignment,facilitates complete embedment of the key attachment f
20、langeand adjacent lath by cement plaster, and is used to attach thelathing accessory.3.2.9 movement gap, nthe element of an expansion jointlathing accessory that accommodates some degree of move-ment in the stucco cladding assembly caused by movement ofthe building, the substrate, or its components.
21、3.2.10 screed, nsynonymous with ground.3.2.11 solid attachment flange, nthe solid attachmentflange element of a lathing or furring accessory that provides ameans for accurate alignment, facilitates drainage where drain-age is required by integration of the solid attachment flangewith the water-resis
22、tive barrier, and which has no holes exceptfor optional fastener holes used to fasten the lathing accessory.3.3 Illustrations (Fig. 1) are intended to generically depictexamples of common lathing and furring accessory shapes andfasteners, by depicting their functional elements in relationshipto each
23、 other, without literally depicting specific manufacturedproducts. Variations of lathing and furring accessory shapesand fasteners illustrated shall be acceptable when the functionand performance is equivalent to or exceeds the illustratedaccessory or fastener.4. Materials and Manufacture4.1 General
24、:4.1.1 Lathing and furring accessories, and fasteners shall befree of deleterious amounts of rust, oil, or other foreign matterthat could cause bond failure or unsightly discoloration.4.1.2 Lathing and furring accessories shall include keyattachment flanges or solid attachment flanges. Solid attach-
25、ment flanges shall accommodate self-piercing fasteners with-out deforming the attachment flange or shall include optionalfastener holes used to fasten the lathing accessory.4.1.3 Lathing and furring accessories shall facilitate lathingand furring installation, cement plaster application, and func-ti
26、onality of the completed stucco cladding assembly. Lathingand furring accessories shall be configured to serve one ormore functions such as to assist in cement plaster thicknesscontrol, to reinforce cement plaster corners, to facilitatedrainage, to reduce cracking by accommodating movement, tosepara
27、te cement plaster from dissimilar materials, load bearingmembers and penetrating elements, and to provide an edge,end, or termination for a cement plaster panel area.4.1.4 Lathing accessories shall be configured to accommo-date application of the specified cement plaster thickness. Theground dimensi
28、on of lathing accessories shall be determined bythe specified thickness of the cement plaster with considerationof the installed configuration of the lathing accessory to the lath(lathing accessory located under or over the lath).4.1.5 Lathing accessories serving a drainage function shallinclude a d
29、rainage surface and a solid attachment flange.4.2 Materials:4.2.1 SteelSpecification A653/A653M, with a G60 coat-ing.4.2.2 Stainless SteelSpecification A240/A240M, Type304 or 316.4.2.3 Zinc AlloySpecification B69, 99 % pure zinc.4.2.4 Anodized Aluminum AlloySpecification B221.4.2.5 PVC and CPVC Plas
30、ticSpecification D1784 orD4216.4.2.6 Lathing accessories shall be corrosion resistant andfabricated from galvanized (zinc-coated) steel, stainless steel,rigid PVC or CPVC plastic, zinc alloy, or anodized aluminumalloy. Lathing accessory base material and minimum thicknessshall be as indicated in Tab
31、le 1.4.2.7 Fasteners shall be fabricated from steel or stainlesssteel and comply with Specifications C954, C1002, and F1667as applicable. Steel fasteners shall have a corrosion resistantplating or coating.4.2.8 Wire shall be corrosion resistant steel wire, annealed,Specification A641/A641M with a Cl
32、ass I galvanized coating,or stainless steel wire, annealed, Specification A580/A580M.4.2.9 Adhesive shall be a materials compatible, exterior,gun-grade, construction adhesive. Expandable foam adhesivesare prohibited.4.2.10 Clips shall be formed from galvanized steel wire,Specification A641/A641M or
33、steel sheet, Specification A653/A653M, depending on use and manufacturers requirements.4.2.11 Rod hanger and strap hanger shall be mild steel, andgalvanized, zinc electroplated, or protected with a rust-inhibiting paint.4.2.12 Cold-rolled channel furring shall be cold-formedsteel, 33 000 psi (228 MP
34、a) yield strength, 0.0538 in.(1.37 mm) bare steel thickness, with a galvanized G60 coating,Specification A653/A653M.4.3 Lathing Accessories to Facilitate Drainage:4.3.1 Weep ScreedLathing accessory located at the bottomof exterior framed or framed and sheathed walls; used as ascreed to assist in cem
35、ent plaster thickness control; to facilitatedrainage; and to provide an edge, end, or termination for acement plaster panel area. Weep screed shall include a solidvertical attachment flange 312 in. (89 mm) long minimum, anda drainage surface that is sloped and either perforated ornon-perforated, or
36、non-sloped and perforated with a captureflange, or non-sloped and non-perforated without a captureflange.C1861 182FIG. 1 Lathing and Furring Accessories, and FastenersC1861 183FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 184FIG. 1 Lathing and Furring Accessories, and Fasten
37、ers (continued)C1861 185FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 186FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 1874.3.2 Designated Drainage ScreedLathing accessory lo-cated at designated exterior locations in addition to the bottomof exterior
38、 framed, or framed and sheathed walls, such as atfloor lines of multi-story buildings, at soffit corners, above wallopenings and projecting elements; used as a screed to assist incement plaster thickness control; to facilitate drainage; toseparate cement plaster from dissimilar materials, load beari
39、ngmembers and penetrating elements; and to provide an edge,end, or termination for a cement plaster panel area. Designateddrainage screed shall include a solid vertical attachment flangeand a drainage surface that is sloped and non-perforated, ornon-sloped and perforated with a capture flange, or no
40、n-slopedand non-perforated without a capture flange.4.3.3 Perforations, where provided on lathing accessorydrainage surfaces to facilitate drainage, shall be in. (6 mm)diameter minimum or an equivalent non-circular perforationarea, at 8 in. (200 mm) on center maximum.4.4 Lathing Accessories for Casi
41、ng:4.4.1 Casing BeadLathing accessory used as a screed toassist in cement plaster thickness control; to separate cementplaster from dissimilar materials, load bearing members andpenetrating elements; and to provide an edge, end, or termina-tion for a cement plaster panel area.4.4.2 Casing BeadSolid
42、flange, a casing bead with a solidattachment flange.4.4.3 Casing BeadKey flange, a casing bead with anattachment flange full of holes or of expanded sheet metal.4.5 Lathing Accessories to Reinforce Corners:4.5.1 Internal Corner ReinforcementLathing accessoryused to reinforce internal cement plaster
43、corners, with keyattachment flanges of not less than 2 in. (50 mm) length, bentto an interior angle between the flanges greater than 90.4.5.2 External Corner ReinforcementLathing accessoryused to reinforce external cement plaster corners; as a screed toassist in cement plaster thickness control; and
44、 to provide anedge, end, or termination for a cement plaster panel area, withkey attachment flanges of not less than 2-12 in. (63 mm) length,bent to an interior angle between the flanges less than 90.4.6 Lathing Accessories to Reduce Cracking:4.6.1 Expansion JointLathing accessory used as a screedto
45、 assist in cement plaster thickness control; to reduce crackingby accommodating movement of the stucco cladding assemblycaused by movement of the building or its components beyondcement plaster shrinkage and thermal variations; to separatecement plaster from dissimilar materials, load bearing mem-be
46、rs and penetrating elements; and to provide an edge, end, ortermination for a cement plaster panel area.An expansion jointlathing accessory shall be formed from two or more separatepieces with solid attachment flanges and a movement gap.4.6.2 Control JointLathing accessory used as a screed toassist
47、in cement plaster thickness control; to reduce cracking byaccommodating movement of the cement plaster claddingassembly caused by shrinkage and thermal variations, alongpredetermined, usually straight, lines; to separate cementplaster from dissimilar materials, load bearing members andpenetrating el
48、ements; and to provide an edge, end, or termina-tion for a cement plaster panel area. A control joint lathingaccessory shall be formed as a single prefabricated piece withkey attachment flanges and a flexible pleat, or assembled froma pair of casing beads installed back to back, with keyattachment f
49、langes and a flexible element functionally similarto the pleat, between them.4.7 Furring Accessories:4.7.1 Rod Hanger, Strap HangerFurring accessories usedto suspend and support cold-rolled channel furring. Rodhangers shall be permitted to be smooth or threaded. Straphangers shall be 1 in. wide by316-in. (25 by 5 mm) thick.4.7.2 Cold-rolled Channel FurringFurring accessory usedto suspend and support lath and lathing accessories. Cold-rolled channel furring shall be in the sizes and weightsindicated in Table 2, with flanges12 in. (13 mm)
