1、Designation:C148702(Reapproved 2012)Standard Guide forRemedying Structural Silicone Glazing1This standard is issued under the fixed designation C1487;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide provides recommendations for remedyingexisting structural sealant glazing(hereinafter called SSG)installations in situ.Remedial work ma
3、y be necessary when alite of glass is replaced,for routine maintenance,or afterdistress is discovered.This guide focuses on large-scaleremedies.1.2 Committee C24 is not aware of any comparable stan-dards published by other organizations.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of B
4、uilding Seals and SealantsC1392 Guide for Evaluating Failure of Structural SealantGlazingC1394 Guide for In-Situ Structural Silicone Glazing Evalu-ationC1401 Guide for Structural Sealant GlazingE330 Test Method for Structural Performance of ExteriorWindows,Doors,Skylights and Curtain Walls by Unifor
5、mStatic Air Pressure DifferenceE997 Test Method for Evaluating Glass Breakage Probabil-ity Under the Influence of Uniform Static Loads by ProofLoad TestingE1233 Test Method for Structural Performance of ExteriorWindows,Doors,Skylights,and Curtain Walls by CyclicAir Pressure Differential3.Terminology
6、3.1 DefinitionsDefinitions of the terms used in this guideare found in Terminology C717.3.2 Definitions of Terms Specific to This Standard:3.2.1 distress,nthe individual or collective physical mani-festations of a failure as perceivable problems.For structuralsealant glazing,such distress may includ
7、e sealant adhesivefailure,sealant cohesive failure,shifting of a lite,loss of a lite,or water infiltration(see Guide C1394).3.2.2 qualified person,none with a recognized degree orprofessional registration and extensive knowledge and experi-ence in the field of structural sealant glazing,and who isca
8、pable of design,analysis,and evaluation in the subject.4.Significance and Use4.1 Guidelines are provided for remedying existing SSGinstallations.Refer to Guide C1401 for a complete discussionof proper SSG design,installation,and materials.4.2 Due to the unlimited range of materials that may be usedi
9、n a particular building,and because each design is unique,theinformation contained in this guide is general in nature.4.3 This guide should not be the only reference consultedwhen designing remedies for SSG.For example,the localbuilding code and the manufacturers product literature for theactual mat
10、erials used,if known,also should be considered.Thesealant manufacturer(s)should be involved fully with theremedial design.4.4 This guide is intended to be a resource,but it is not asubstitute for experience and judgement in designing remediesfor the specialized types of construction discussed.It isi
11、ntended to be used in conjunction with other resources as anaid in remedying problems with existing SSG.5.Introduction5.1 There are numerous reasons that a building owner ormanager,hereinafter referred to as owner,may choose toremedy an SSG system,including routine maintenance or tocorrect discovere
12、d deficiencies.Regardless of the reason thatsuch a remedy is undertaken,it is recommended that theremedial design and construction be performed under thesupervision of a qualified person.5.2 It is essential to begin the remedial process with acomprehensive evaluation,in accordance with the guideline
13、sestablished in Guide C1394.The underlying cause of failuremust be understood fully prior to implementing a remedy;otherwise,the failure may be repeated.1This guide is under the jurisdiction ofASTM Committee C24 on Building Sealsand Sealants and is the direct responsibility of Subcommittee C24.10 on
14、Specifications,Guides and Practices.Current edition approved June 1,2012.Published July 2012.Originally approvedin 2000.Last previous edition approved in 2007 as C148702(2007).DOI:10.1520/C1487-02R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service a
15、t 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 5.3 Based on the outcome of the evaluation,various rem-e
16、dies may be indicated.The potential remedies include,de-pending on the pervasiveness and the nature of the problem,the following:5.3.1 Isolated repairs(such as the replacement of an indi-vidual lite of glass)can be performed by a competent glaziertrained in the proper installation of SSG.If the original SSGwas properly performed,then such minor repairs can beeffected by careful duplication of the original procedures.5.3.2 In-situ remedial work is necessary where pervasiveproblems exist in an SSG
