ASTM_C_1467_-_C_1467M_-_00_2016.pdf

Designation:C1467/C1467M00(Reapproved 2016)Standard Specification forthe Installation of Molded Glass Fiber Reinforced GypsumParts1This standard is issued under the fixed designation C1467/C1467M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the installation of molded glassfiber reinforced gypsum(GRG)parts.1.2 The values stated in either inch-pound units or SI(metric)are to be regarded separately as the standard.Withinthe text,SI units are shown in brackets.The values stated ineach shall be used independent of the other.Values from thetwo systems shall not be combined.1.3 All references to finishes,dimensions and tolerancesshall refer to the finished surface of the part.1.4 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.2.Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC754 Specification for Installation of Steel Framing Mem-bers to Receive Screw-Attached Gypsum Panel ProductsC840 Specification forApplication and Finishing of GypsumBoardC1007 Specification for Installation of Load Bearing(Trans-verse and Axial)Steel Studs and Related AccessoriesC1381 Specification for Molded Glass Fiber ReinforcedGypsum Parts3.Terminology3.1 Definitions Definitions of terms shall be in accordancewith Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 critical lighting,nstrong side lighting from naturalor artificial light sources.3.2.2 primer,npaint material formulated to fill the poresand equalize the suction difference between the GRG part andfinishing compounds used.4.Materials4.1 Molded GRG parts shall meet the requirements ofSpecification C1381.5.Environmental Conditions5.1 Room temperature shall be maintained at not less than40 F 4 C during the installation of GRG parts except whenadhesive is used for the bonding or attachment of parts to eachother or to a substrate.For the bonding of adhesive and jointtreatment the room temperature shall be maintained at not lessthan 50 F 10 C for 48 hours prior to application andcontinuously thereafter until completely dry.5.2 When a temporary heat source is used,the temperatureshall not exceed 95 F 35 C in any given room or area.5.3 Installed GRG shall be protected from direct exposure torain,snow,sunlight and other excessive weather conditions.NOTE1Installation in conditions of excessive humidity is not recom-mended.The ideal conditions to install molded GRG parts is 70 F 21 Cand 50%RH.6.Substrate Preparation6.1 Substrates to accept GRG parts shall be installed straightand true within18in.in 8 ft 3 mm in 2500 mm and shall befree of obstructions and interference that prohibits correctattachment of GRG parts.6.2 Metal framing members shall be of the proper size anddesign for the intended use and shall be sufficient to properlysupport the installed GRG parts.Metal framing members shallbe installed in accordance with Specification C754 or C1007 asrequired.7.Tolerances of Installed GRG Parts7.1 Parts shall be installed plumb and not be out of linemore than 618in.in 8 ft 3 mm in 2500 mm in any direction.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.03 on Specifications for theApplication of Gypsum and OtherProducts in Assemblies.Current edition approved Sept.1,2016.Published September 2016.Originallyapproved in 2000.Last previous edition approved in 2012 as C1467/C1467M 00(2012).DOI:10.1520/C1467_C1467M-00R16.2For 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 website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.2 The planar surface of any part shall not vary by morethan18in.3 mm from the planar surface of any adjacent part.7.3 GRG parts shall be installed so that the joints betweenparts are not more than14in.6 mm in width.8.Installation of GRG Parts8.1 GRG parts shall be installed to the tolerances stated inSection 7.8.2 GRG parts shall be installed according to manufactur-ers directions onto substrates and with fastening devices asspecified by the GRG manufacturer.9.Finishing of GRG Parts9.1 GRG parts shall be finished in accordance with themanufacturers directions.9.2 GRG parts subject to critical lighting or scheduled toreceive gloss or semi-gloss decoration shall be prepared as aLevel 5 finish in