ASTM_C_1394_-_03_2012.pdf

Designation:C139403(Reapproved 2012)Standard Guide forIn-Situ Structural Silicone Glazing Evaluation1This standard is issued under the fixed designation C1394;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()indicates an editorial change since the last revision or reapproval.INTRODUCTIONSSG is popular because of its unique method of retaining glass or other panels in smooth exteriorwalls,interrupted only by narrow sealant joints.The first four-sided SSG in commercial constructionis on the former corporate headquarters building of SHG Incorporated(formerly known as Smith,Hinchman&Grylls)in Detroit,MI,built in 1971.Since then,buildings containing two-or four-sided(or,occasionally,other numbers of sides of nonrectangular-shaped panels)SSG walls have beenconstructed within most cities,some as tall as 80 stories.While SSG popularity increases,the sealant industry remains concerned over potential failures dueto the increasing number of buildings containing structural glazing that are aging;unknown structuralsealant durability;and the level of understanding of the principles of SSG by glazers.This guideaddresses these concerns by providing suggestions for in situ evaluations of completed installations ofany age.1.Scope1.1 It is recommended to periodically evaluate the existingcondition of structural sealant glazing(hereinafter called SSG)installations in situ to detect problems before they becomesevere or pervasive.Evaluation of existing SSG installationsare required by certain building codes and local ordinances.This guide provides a program to evaluate the existingconditions,lists typical conditions,which might be found,andsuggests times when such evaluations are appropriate.Thecommittee with jurisdiction over this standard is not aware ofany comparable standards published by any other organiza-tions.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC1392 Guide for Evaluating Failure of Structural SealantGlazingC1401 Guide for Structural Sealant Glazing3.Terminology3.1 Definitions:The definitions of the following terms usedin this guide are found in Terminology C717:structural sealant;structural sealant glazing;two-sided structural sealant glazing;four-sided structural sealant glazing;fluid migration.3.2 Definitions of Terms Specific to This Standard:3.2.1 qualified personone with a recognized degree orprofessional registration and extensive knowledge and experi-ence in the field of structural sealant glazing,and who iscapable of design,analysis,evaluation,and specifications inthe subject.4.Significance and Use4.1 Guidelines are provided for the procedures to evaluateexisting SSG installations,including two-and four-sidedinstallations.Due to the unlimited range of materials that maybe used in a particular building,the information contained inthis guide is general in nature.For a discussion of new SSGinstallations,refer to Guide C1401.4.2 Typical conditions are listed that might be discoveredduring,or suggest the need for,such evaluations.Guidelinesare also suggested for times to perform evaluations.Theseguidelines are also necessarily general.Professional judgmentof a qualified person should be used in determining theappropriate time to perform an evaluation on a particularbuilding.4.3 This guide should not be the only reference consultedwhen determining the scope of a proposed evaluation.Forexample,the local building code and the manufacturers1This guide is under the jurisdiction ofASTM Committee C24 on Building Sealsand Sealants and is the direct responsibility of Subcommittee C24.10 onSpecifications,Guides and Practices.Current edition approved Dec.1,2012.Published December 2012.Originallyapproved in 1998.Last previous edition approved in 2008 as C139403(2008).DOI:10.1520/C1394-03R12.2For 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 product literature for the actual materials used(if known)should also be considered.4.4 This document is not a substitute for experience andjudgment in assessing the condition of the specialized types ofconstruction discussed.5.Reasons to Perform an Evaluation5.1 There are numerous reasons that a building owner ormanager(hereinafter“owner”)may choose to evaluate an SSGsystem,whether discretionary or to comply with an ordinance.The recommended evaluation levels,as discussed in Section 7,are referenced for each situation.The findings from one levelof investigation may trigger the need for a more in-depthinvestigation.At a minimum,it is recommended that anexisting SSG installation be