1、Designation: C1861 17Standard 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. Scope1.1 This specification contains the minimum requirementsfor lathing and furring acce
3、ssories, 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 The
4、 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 recognized
5、 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 f
6、or 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(Galvaniz
7、ed) 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 S
8、crews 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 Chlo
10、ride) (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 b
12、etweenthe 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, by
13、 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 Acc
14、essories andRelated Products.Current edition approved July 1, 2017. Published August 2017. DOI: 10.1520/C186117.2For 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
15、standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the
16、 Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.4 drip flange, nthe narrow flange element of a lathingaccessory that facilitates a drainage function, projects fro
17、m 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 flexible pleat, nthe flexible element of a control jointlathing accessory that accommodates movement of the cementplaster cladding assembly caused by shr
18、inkage and thermalvariations.3.2.7 ground, nthe element of a lathing accessory thatprovides an edge, end, or termination for a cement plaster panelarea, with a ground dimension to assist in cement plasterthickness control.3.2.8 key attachment flange, nthe attachment flange ele-ment of a lathing acce
19、ssory that is full of holes or is expandedsheet metal that provides a means for accurate alignment,facilitates complete embedment of the key attachment flangeand adjacent lath by cement plaster, and is used to attach thelathing accessory.3.2.9 movement gap, nthe element of an expansion jointlathing
20、accessory that accommodates some degree of move-ment in the stucco cladding assembly caused by movement ofthe building, the substrate, or its components.3.2.10 screed, nsynonymous with ground.3.2.11 solid attachment flange, nthe solid attachmentflange element of a lathing or furring accessory that p
21、rovides ameans for accurate alignment, facilitates drainage where drain-age is required by integration of the solid attachment flangewith the water-resistive barrier, and which has no holes exceptfor optional fastener holes used to fasten the lathing accessory.3.3 Illustrations (Fig. 1) are intended
22、 to generically depictexamples of common lathing and furring accessory shapes andfasteners, by depicting their functional elements in relationshipto each other, without literally depicting specific manufacturedproducts. Variations of lathing and furring accessory shapesand fasteners illustrated shal
23、l be acceptable when the functionand performance is equivalent to or exceeds the illustratedaccessory or fastener.4. Materials and Manufacture4.1 General:4.1.1 Lathing and furring accessories, and fasteners shall befree of deleterious amounts of rust, oil, or other foreign matterthat could cause bon
24、d failure or unsightly discoloration.4.1.2 Lathing and furring accessories shall include keyattachment flanges or solid attachment flanges. Solid attach-ment flanges shall accommodate self-piercing fasteners with-out deforming the attachment flange or shall include optionalfastener holes used to fas
25、ten the lathing accessory.4.1.3 Lathing and furring accessories shall facilitate lathingand furring installation, cement plaster application, and func-tionality of the completed stucco cladding assembly. Lathingand furring accessories shall be configured to serve one ormore functions such as to assi
26、st in cement plaster thicknesscontrol, to reinforce cement plaster corners, to facilitatedrainage, to reduce cracking by accommodating movement, toseparate cement plaster from dissimilar materials, load bearingmembers and penetrating elements, and to provide an edge,end, or termination for a cement
27、plaster panel area.4.1.4 Lathing accessories shall be configured to accommo-date application of the specified cement plaster thickness. Theground dimension of lathing accessories shall be determined bythe specified thickness of the cement plaster with considerationof the installed configuration of t
28、he lathing accessory to the lath(lathing accessory located under or over the lath).4.1.5 Lathing accessories serving a drainage function shallinclude a drainage surface and a solid attachment flange.4.2 Materials:4.2.1 SteelSpecification A653/A653M, with a G60 coat-ing.4.2.2 Stainless SteelSpecifica
29、tion 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 PlasticSpecification D1784 orD4216.4.2.6 Lathing accessories shall be corrosion resistant andfabricated from galvanized (zinc-coated) steel, stainless
30、steel,rigid PVC or CPVC plastic, zinc alloy, or anodized aluminumalloy. Lathing accessory base material and minimum thicknessshall be as indicated in Table 1.4.2.7 Fasteners shall be fabricated from steel or stainlesssteel and comply with Specifications C954, C1002, and F1667as applicable. Steel fas
31、teners shall have a corrosion resistantplating or coating.4.2.8 Wire shall be corrosion resistant steel wire, annealed,Specification A641/A641M with a Class I galvanized coating,or stainless steel wire, annealed, Specification A580/A580M.4.2.9 Adhesive shall be a materials compatible, exterior,gun-g
32、rade, construction adhesive. Expandable foam adhesivesare prohibited.4.2.10 Clips shall be formed from galvanized steel wire,Specification A641/A641M or steel sheet, Specification A653/A653M, depending on use and manufacturers requirements.4.2.11 Rod hanger and strap hanger shall be mild steel, andg
33、alvanized, zinc electroplated, or protected with a rust-inhibiting paint.4.2.12 Cold-rolled channel furring shall be cold-formedsteel, 33 000 psi (228 MPa) yield strength, 0.0538 in.(1.37 mm) bare steel thickness, with a galvanized G60 coating,Specification A653/A653M.4.3 Lathing Accessories to Faci
34、litate Drainage:4.3.1 Weep ScreedLathing accessory located at the bottomof exterior framed or framed and sheathed walls; used as ascreed to assist in cement plaster thickness control; to facilitatedrainage; and to provide an edge, end, or termination for acement plaster panel area. Weep screed shall
35、 include a solidvertical attachment flange 312 in. (89 mm) long minimum, anda drainage surface that is sloped and either perforated ornon-perforated, or non-sloped and perforated with a captureflange, or non-sloped and non-perforated without a captureflange.C1861 172FIG. 1 Lathing and Furring Access
36、ories, and FastenersC1861 173FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 174FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 175FIG. 1 Lathing and Furring Accessories, and Fasteners (continued)C1861 176FIG. 1 Lathing and Furring Accessories, and Faste
37、ners (continued)C1861 1774.3.2 Designated Drainage ScreedLathing accessory lo-cated at designated exterior locations in addition to the bottomof exterior framed, or framed and sheathed walls, such as atfloor lines of multi-story buildings, at soffit corners, above wallopenings and projecting element
38、s; used as a screed to assist incement plaster thickness control; to facilitate drainage; toseparate cement plaster from dissimilar materials, load bearingmembers and penetrating elements; and to provide an edge,end, or termination for a cement plaster panel area. Designateddrainage screed shall inc
39、lude a solid vertical attachment flangeand a drainage surface that is sloped and non-perforated, ornon-sloped and perforated with a capture flange, or non-slopedand non-perforated without a capture flange.4.3.3 Perforations, where provided on lathing accessorydrainage surfaces to facilitate drainage
40、, 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 Casing:4.4.1 Casing BeadLathing accessory used as a screed toassist in cement plaster thickness control; to separate cementplaster from dissimilar mate
41、rials, 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 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 expande
42、d sheet metal.4.5 Lathing Accessories to Reinforce Corners:4.5.1 Internal Corner ReinforcementLathing accessoryused to reinforce internal cement plaster 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 Exter
43、nal Corner ReinforcementLathing accessoryused to reinforce external cement plaster corners; as a screed toassist in cement plaster thickness control; and 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 t
44、o 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 assist in cement plaster thickness control; to reduce crackingby accommodating movement of the stucco cladding assemblycaused by movement of the b
45、uilding or its components beyondcement plaster shrinkage and thermal variations; to separatecement plaster from dissimilar materials, load bearing mem-bers and penetrating elements; and to provide an edge, end, ortermination for a cement plaster panel area.An expansion jointlathing accessory shall b
46、e 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 in cement plaster thickness control; to reduce cracking byaccommodating movement of the cement plaster claddingassembly caused by shrinkage and the
47、rmal variations, alongpredetermined, usually straight, lines; 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. A control joint lathingaccessory shall be formed as a single
48、prefabricated piece withkey attachment flanges and a flexible pleat, or assembled froma pair of casing beads installed back to back, with keyattachment flanges and a flexible element functionally similarto the pleat, between them.4.7 Furring Accessories:4.7.1 Rod Hanger, Strap HangerFurring accessor
49、ies 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) wide andinside corner radii18 in. (3 mm) maximum.4.7.3 Z-furringZ-furring used to support lath and lathingaccessories and its fasteners for faste
