ASTM_C_797_-_99.pdf

Designation:C 797 99Standard Practices forUse of Oil-and Resin-Based Putty and Glazing Compounds1This standard is issued under the fixed designation C 797;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 the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 These practices describe procedures for the identifica-tion,selection,and application of oil-and resin-based putty andglazing compounds,in glazing installations.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:C 669 Specification for Glazing Compounds for Back Bed-ding and Face Glazing of Metal Sash2C 717 Terminology of Building Seals and Sealants22.2GANA Industry Standards:Glazing Manual,1997 Edition33.Terminology3.1 Definitions:3.1.1 Refer to Terminology C 717 for definitions of thefollowing terms:bed,bite,compatibility,compound,faceglazing,glazing,light.3.1.2 Refer to Terminology C 717 for descriptions of thefollowing terms:channel glazing,point,united millimetres(united inches).4.Significance and Use4.1 These practices provide standard procedures for theproper identification,selection,and use of glazing compoundsfor specific types of glazing applications(see SpecificationC 669).4.2 Face GlazingShould be limited to single lights ofglass or panels that do not exceed 1905 united mm(united 75in.)(See Fig.1.).4.3 Channel GlazingShould be limited to single lights ofglass or panels that do not exceed 3175 united mm(125 unitedin.)(See Fig.2.).4.4 The compound should be identified on the exterior of itspackage as to its intended usage for channel or face glazing andshould state its appropriateness for use on wood or metal orboth.4.5 The compound should be selected for application inaccordance with the manufacturers specifications and recom-mendations for usage.Under no circumstances shall it be usedin a manner contrary to the manufacturers recommendations.4.6 The compounds described in these practices are nor-mally not suitable for glazing high-rise construction or for usein conjunction with high performance glasses such as heatabsorbing,reflective,insulating,etc.Contact individual manu-facturers for specific recommendations for these types of glassproducts.5.Glazing Procedures5.1 Sash and Glass Preparation:5.2 The glass should be of the thickness recommended by1These practices are under the jurisdiction of ASTM Committee C-24 onBuilding Seals and Sealants and are the direct responsibility of SubcommitteeC24.12 on Oil and Resin Base Glazing and Caulking Sealants.Current edition approved Feb.10,1999.Published April 1999.Originallypublished as C 797 75.Last previous edition C 797 94.2Annual Book of ASTM Standards,Vol 04.07.3Available from GlassAssociation of NorthAmerica,3310 SW Harrison Street,Topeka,KS 666112279.A Finish edge of glazing or sealing surfaceG Fixed stopB BiteH Removable stopC Bed thicknessI Lite(glass or panel)D Edge clearanceJ Lite thicknessE Channel or rabbet depthK Face dimensionFIG.1 Face Glazing Detail1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.its manufacturer for the size and loading of the opening to beglazed,and should meet safety glazing requirements whereapplicable.5.2.1 Cut the glass in accordance with the tolerances pre-scribed in the Glazing Manual.35.2.2 Sash to be glazed must be clean and dry.Seal cornersof metal sash prior to glazing.5.2.3 Completely remove oil,grease,dust,moisture,sol-vents,and other contaminations of the sash and glass surfacesbefore the actual process of glazing begins.5.3 Glazing Compound,Storage and Thinning:5.3.1 For usage during cold weather,store the glazingcompound in a warm place prior to application.5.3.2 Thinning of glazing compound is generally not rec-ommended,but if absolutely necessary,it should be done bymeans and manner specified or recommended by its manufac-turer.5.4 Installation:5.4.1 When the face glazing method is used,install the glasswith a sufficient number of clips or points to hold the glass inplace without the glazing compound.This can usually beaccomplished by spacing the clips approximately every 305mm(12 in.)but in no case shall there be less than one clip oneach side.5.4.2 The minimum requirements for bite should be asfollows:Up to 1270 united mm(or 50 united in.)6.35 mm(14in.)Up to 2540 united