International Code Requirements For Windows & Doors

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International Code Requirements for Windows & DoorsCourtesy of the American Architectural Manufacturers AssociationThe family of InternationalCodes published by the International Code Council is the mostwidely used set of model codes in thehistory of U.S. construction codes.In addition to their widespread usethroughout the 50 states, numerousfederal agencies—including theNational Park Service and the U.S.Department of Defense—have alsoadopted the International Codes. ICCis also starting to be adopted in countries other than the U.S., particularlyin the Middle East.The following is intended as asummary of the major requirementsset forth for windows, doors andother fenestration products in the2012 International Residential Code,the 2012 International Building Codeand the 2012 International EnergyConservation Code. Manufacturersand dealers that sell products in several states should be aware, however,that at this point, multiple editionsof the International Codes are beingenforced by various U.S. jurisdictions.Most states and local jurisdictionsare currently using the 2009 editionsof these codes. According to the ICCwebsite—as of fall 2013—the 2009IRC is being enforced either locallyor statewide in 22 states and the 2009IECC is being enforced either locallyor statewide in 32 states.Several states and local jurisdictions are still using the 2006 editionof these codes as well. The ICC website indicates the 2006 IRC is beingenforced either statewide or locally in11 states. There are even a few statesthat are still enforcing one of the firsttwo editions of the IRC–the 2000 or2003 edition.Adoption and enforcement of the2012 editions of the InternationalCodes, however, has begun to gettraction. According to the ICC website, as of fall 2013, the 2012 IRC andthe 2012 IECC were being enforced,either statewide or locally, in sevenstates. Various other states, includingFlorida and California, are completingtheir adoption of the 2012 I-codesand are expected to begin enforcingthem, with state amendments, in2014.The ICC website (www.iccsafe.org)offers updated information on whichedition of its codes is in effect in eachstate and various cities and countiesaround the country.The user of this summary is alsocautioned to realize it is not a fulldiscussion of all the requirementsof the 2012 International Codesfor fenestration products. Relevantsections of the codes are identifiedand more specific information canbe gained by obtaining a copy of therelevant code or codes from ICC. Itis also important to note that somejurisdictions adopt one or more ofthe International Codes, and thenmake their own amendments at thestate or local level. As a result, manyjurisdictions have their own versionsof these particular codes.This summary does not attemptto address all of these variations ofthe base model code. In some cases,these jurisdictional-specific versionsof the International Codes can be obtained from the ICC. In other cases,the jurisdictional-specific versionsmust be obtained directly from thatparticular jurisdiction. Contact information for ICC and other organizations mentioned in this article can befound in the Association Directory.RECENT CHANGESThere are several significant changesbetween the 2009 edition and the2012 edition of the InternationalCodes that relate to fenestrationproducts. Cumulatively, these changes include: An update to the 2011 editionof AAMA/WDMA/CSA 101/I.S.2/A440-11 NAFS/North AmericanFenestration Standard/Specification for Windows, Doors,and Skylights, Removal of separate energyconservation provisions for residential construction in boththe IECC and the IRC Updating to the strengthdesign based wind speed mapsof ASCE 7-10 Minimum DesignLoads for Buildings and OtherStructures for the determination of design wind pressure inthe IBCThe addition of an exceptionto the minimum windowsill height requirements forwindows equipped with window opening control devices(WOCDs) in the IRC and IBC,A change in the minimum sillheight required for operablewindows in the IBC.TESTING AND LABELING OFWINDOWS AND DOORSExterior windows and doors arecovered in Section 1710.5 of the 2012IBC and Section R612 of the 2012IRC. These sections require windowsand sliding doors to be tested andlabeled in accordance with AAMA/WDMA/CSA 101/I.S.2/A440-11. Thestandard was developed jointly by theAmerican Architectural Manufacturers Association, the Window & DoorManufacturers Association and theCanadian Standards Association. (Thecomplete document is available fromall three organizations.)The 2011 edition of the standardreferenced in the 2012 IBC andIRC represents an update from theprevious reference to AAMA/WDMA/CSA 101/I.S.2/A440-08 in the 2009IBC, IECC and IRC. As in the 2009IBC/IRC, the latest edition of thestandard applies to windows and“sliding doors” in the 2012 IBC and2012 IRC. Other types of fenestration assemblies not includedwithin the scope of AAMA/WDMA/CSA 101/I.S.2/A440-11, includingcurtain wall and storefront, are alsoaddressed in Section 1710.5 of the2012 IBC. These assemblies are to betested to 1.5 times allowable stressdesign load in accordance withASTM E330-02, and the glass is to bedesigned in accordance with ASTME1300-07e01.www.WindowandDoor.com 137

International Code Requirements for Windows & DoorsExterior swinging doors can betested and labeled in accordance withAAMA/WDMA/CSA 101/I.S.2/A440-11or tested to 1.5 times allowable stressdesign load in accordance with ASTME330-02. The 2012 IBC also permitsgarage doors to be tested to ANSI/DASMA 108-05, in lieu of ASTM E330.AAMA/WDMA/CSA 101/I.S.2/A44011 contains provisions for some typesof exterior swinging doors. AAMAhas also put into place a program tocertify these types of products forcompliance with this standard. Thisprogram depends upon testing ofeach proposed door assembly, ratherthan the component-based approachoffered by ANSI A250.13 and others.Unit skylights are also required tobe tested and labeled in accordancewith AAMA/WDMA/CSA 101/I.S.2/A440-11 by both the 2012 IBC and2012 IRC. Unit skylights are factorymanufactured fenestration assembliesintended to be installed in a singleroof opening without intermediateframing members. Tubular daylighting devices are included within thedefinition of unit skylights in the2012 IBC and 2012 IRC.The requirements for skylights andsloped glazing occur in Section 2405of the 2012 IBC and R308.6 of the2012 IRC. Section 2405.5 permits unitskylights to be evaluated for differentpositive and negative design pressures. This is unique to unit skylights.Skylights are subject to snow loadas well as wind and dead load. Thecombination of these loads will oftenresult in varying required ratings forpositive and negative pressures onunit skylights.The 2012 IBC requires exteriorwall cladding systems—includingcurtain wall, storefront and punchedopenings—in high wind areas to besubject to special inspections. Thehigh wind areas are determined byexposure category of the building. Ifthe building is in Exposure CategoryB (surrounded by low- to mid-risebuildings) then special inspectionis required if the Allowable Stress138 Window&Door 2014 Buying GuideDesign wind speed is 120 mph orgreater. If the building is in ExposureCategory C (open prairies) or D (nearlarge bodies of water) then specialinspection is required if the AllowableStress Design wind speed is 110 mphor greater.Special inspections, by definitionin the IBC, are to be performed bypersons who are specifically qualifiedto inspect the installation in question.They are only required for that partof the system design that requiresa registered design professional. Sofor a punched window opening, thespecial inspection would be of thestructural components—predominately the anchorage—whose designmust be conducted by a registereddesign professional.DESIGN LOADSProvisions for design loads are setforth in Section R301 of the 2012 IRCand Chapter 16 of the 2012 IBC. Thedesign loads of concern for verticalglazing are design wind load and impact resistance. Skylights and slopedglazing are also subject to snow loadand dead load.Wind Loads—Tables R301.2(2) andR301.2(3) of the 2012 IRC give thedesign wind loads for glazed openings, based on the design wind speedof the specific location where construction is to take place, the meanheight of the building and its exposure. These tables are based on theAllowable Stress Design wind speedsgiven in the 2012 IRC.There are significant changes tothe design wind load requirementsfor fenestration between the 2009IBC and the 2012 IBC. These are dueto significant changes to the windload provision of the ASCE 7 standardbetween the 2005 and 2010 editions.For the most part, however, thesechanges were not brought forth forthe 2012 IRC.The design wind load provisions ofthe 2005 and earlier editions of ASCE7 were based upon Allowable StressDesign of building components. Theintent of this method was to provideloads to which the building components had a fairly high likelihood ofbeing exposed during the service lifeof the building. The building components were then designed to remainserviceable (i.e. not require replacement) when subjected to that load.The 2010 edition of ASCE 7 provides design wind load provisionsthat are based upon Strength Designof building components. This method provides loads that have a lowerlikelihood of occurring during theservice life of the building. The building components are then designednot to fail (rupture) when subjectedto that load.This change in methodologyresults in higher design wind speedsand pressures when Strength DesignLoads are calculated. At first glance,this might give the appearance ofrequiring higher DP ratings for exterior windows, doors and skylights.In actuality, the 2012 IBC containsprovisions to multiply this new, higher Strength Design load by a factorof 0.6 for the purpose of conversionto the more traditional method ofdetermining the design wind pressure based upon Allowable StressDesign. It is very important that thebuilder, code official, manufacturerand anyone else involved in choosingor approving the windows, doors orskylights for a particular applicationunderstand that the higher designwind pressure provided by the 2012IBC must be multiplied by this 0.6conversion factor for the purposes ofcomparison to the Design Pressurerating of the fenestration product. Inmost, but not all, cases this conversion results in required designpressure ratings for fenestration thatare roughly comparable to the moretraditionally determined values.AAMA, WDMA, FMA and DASMA havepublished a technical bulletin on thistopic. This bulletin can be downloaded from the AAMA website at www.aamanet.org.ASCE7-10 also provides three dif-

ferent design wind speed maps. Thedifferent maps are based upon the assigned Risk Category of the buildingbeing designed.There is one map for buildingswhose collapse would present a lowrisk to human life. These includebarns and storage facilities.There is a second map for buildingswhose collapse is considered to be amoderate hazard to human life. Mostbuildings fall within this category, including low rise residential buildings.The new maps result in higher designwind loads for buildings in this category than for those that present a lowrisk to human life.There is a third map for buildingswhose collapse is considered a highthreat to human life, and for thosewhich are considered essential facilities. The former includes assemblyor education buildings designed tohouse groups of 250 or more people,outpatient type medical care facilities, prisons and any other buildingsdesigned to house 5,000 peopleor more. Essential facilities includeoccupancies such as hospitals, policeand fire stations, emergency shelters and power generating facilities.The integrity of these buildings isessential during emergency responsesituations.The highest design wind speedsare given by the third map for buildings of high hazard to human life andessential facilities. These wind speedsresults in the highest design windloads. Previous editions of ASCE 7and the IBC also required these typesof buildings to be designed to higherdesign loads, but the actual increasewas applied in a different manner.The 2012 IRC retains the traditional method of determining designwind pressure based upon AllowableStress Design. For the most part,the required DP rating of the 2012IRC for fenestration therefore hasnot changed. There have been somechanges to the design wind speedmap, however, that will change theactual required DP rating in somecoastal areas. The user of the 2012IRC should be aware that, unlike the2012 IBC, the design wind pressurevalues obtained from the 2012 IRCare not to be multiplied by 0.6 forthe purposes of comparison to theDP rating of the fenestration product. The design wind pressure valuesof the 2012 IRC have already beenadjusted to be consistent with otherdesign provisions of the 2012 IRCthat are based upon Allowable StressDesign. This includes the DP rating offenestration products under AAMA/WDMA/CSA 101/I.S.2/A440.There has been concern that thetwo sets of provisions in the commercial code (IBC) vs. the residentialcode (IRC) could result in confusionwhen they are implemented. Therefore some states, such as Florida,have amended the 2012 IRC forconsistency to the design wind loadprovisions of the 2012 IBC.Dead Loads—The provisions fordead load in Section 1606 of the 2012IBC are also based on ASCE 7-10.There are no significant changes tothe dead load requirements for fenestration between the 2009 IBC and2009 IRC, and the 2012 editions ofthe same codes.Impact Resistance—Section1609.1.2 of the 2012 IBC and SectionR301.2.1.2 of the 2012 IRC outlinethe locations where impact-resistantproducts are required. All exterioropenings in wind-borne debris areasare required to be impact resistant inthe 2012 IBC and 2012 IRC.The geographical locations whereimpact protection of openings isrequired are similar to those given inASCE 7-10 and are primarily definedby design wind speed. Since threedifferent design wind speed maps aregiven in the 2012 IBC, it means someareas may be considered wind-bornedebris areas for buildings such asessential facilities, but not for buildings whose collapse is considered tobe of moderate threat to human life.In other words, in some parts of thecountry impact-resistant openingswill be required for hospitals and police and fire stations, but not for office buildings and retail stores. It maybe appropriate to provide a higherlevel of safety for the former buildings, but it will also require thoseselling fenestration products in thoseareas to be aware of this distinctionand when it applies in their market.Products that need to meet impactresistance requirements must betested to one of a few different setsof standards. One option that existsin both the 2012 IBC and 2012 IRCis testing in accordance with ASTME1886-05 and ASTM E1996-09, whichmust be used together. The 2012IRC also recognizes the AAMA 506certification label tab as evidence thata product has been tested appropriately. The AAMA 506 tab provides amethod for window manufacturers todemonstrate that their product hasbeen successfully tested in accordance with ASTM E 1886 and ASTME 1996 by placing a tab right on theirproduct, adjacent to the requiredAAMA/WDMA/CSA 101/I.S.2/A440label. Both the 2012 IBC and IRC alsopermit the use of “other approvedtests.” This may include Miami-DadeCounty test protocols, if approved bythe authority having jurisdiction.For residential applications, use ofprotective wood panels as an alternative to impact-resistant glazing orshutters continues to be permittedfor limited applications. The 2012 IBCand IRC limit the use of protectivewood panels to openings in one- andtwo-story, single-family dwellings, duplexes and residential care facilities.ENERGYRequirements for energy performancein both residential and commercialbuildings are spelled out in the 2012International Energy ConservationCode. The energy conservationrequirements for one- and two-familyhomes and townhouses three stories or less in height are also given inChapter 11 of the 2012 IRC. Beginning with the 2012 Internationalwww.WindowandDoor.com 139

International Code Requirements for Windows & DoorsCodes, however, the energy conservation provisions of Chapter 11 ofthe IRC are an exact duplicate of theprovisions of the IECC for the samebuilding. Previously, there was somevariation in the energy performancerequirements for residential buildingsthat were included in both the IECCand the IRC. In jurisdictions using the2009 or earlier editions of the IECCand IRC, it is essential to verify whichset of requirements are to be complied with for residential constructionbefore beginning a project.The 2012 IECC has three compliance paths for residential construction and two compliance paths forcommercial construction. For bothresidential construction and commercial construction, one availablepath of compliance is the prescriptivepath, which is the simplest to use,providing one set of energy efficiencyrequirements for each component ofthe building envelope.For residential construction, underthe prescriptive provisions there isno limit on the percentage of glazingin the exterior wall. There is also nolimit on the percentage of roof areathat is skylights under the prescriptive provisions for residential construction.Use of the prescriptive path incommercial buildings is limited tobuildings where the vertical glazingand skylight area do not exceedcertain limits. New to the 2012 IECC,these limits are dependent uponwhether or not automatic daylightingcontrols are provided in the daylitareas of the building. The limit onvertical glazing also depends uponthe extent to which the interior ofthe building is daylit.If (1) a building is equipped withautomatic daylighting controls, (2) atleast 50 percent of the conditionedfloor area is in a daylight zone, and(3) the glazing has a VT/SHGC ratiogreater than 1.1, then 40 percent ofthe above grade wall area of a commercial building is permitted to befenestration area. If all three of these140 Window&Door 2014 Buying Guidecriteria are not met, then the fenestration area is limited to 30 percent ofthe above grade wall area.Similarly for skylights, if a buildingis equipped with automatic daylighting controls, up to 5 percent of theroof area is permitted to be skylights.If the building is not equipped withautomatic daylighting controls, thenskylights are not to exceed 3 percentof the roof area under the prescriptive provisions of the 2012 IECC.Automatic daylighting controlsreduce the level of artificial lightingprovided when daylighting is provided to a room or space. Combiningautomatic daylighting controls withwell-placed fenestration allows fenestration to have a positive impact onthe overall energy use of the buildingby reducing the lighting load duringdaylight hours.The prescriptive paths for both res-idential and commercial constructionestablish maximum permitted U-factors and solar heat gain coefficientsfor fenestration. U-factor is to bedetermined in accordance with NFRC100-09 or by use of a default table inthe 2012 IECC. Similarly, the SHGC ofthe fenestration is to be determinedin accordance with NFRC 200-09 orby use of a default table in the 2012IECC. Figs. 1 and 2 show the maximum permitted U-factors and SHGCfor vertical fenestration and skylightsin low-rise residential constructionwhen the prescriptive path of the2012 IECC and 2012 IRC is used.The residential provisions of the2012 IECC apply to one and twofamily homes, and other types ofresidential buildings, such as multifamily buildings and assisted-livingfacilities, that are three stories or lessin height. For these buildings, theFig. 1—Maximum U-factor and SHGC values for vertical fenestrationin low-rise residential construction in the 2012 IECC and IRCFig. 2—The maximum U-factors and SHGC for skylights in low-riseresidential construction

residential provisions of the 2012IECC govern if it has been adoptedby the applicable jurisdiction. Othertypes of residential occupancies, suchas multifamily buildings and assistedliving facilities greater than threestories in height, and hotels andmotels of any height, are governed bythe provisions of the 2012 IECC forcommercial buildings.The other two compliance pathsfor residential construction in the2012 IECC permit some tradeoffsin levels of energy efficiency fromone building component to another.One of these—designated the UAalternate method—only permitstradeoffs between different elementsof the building envelope. The othermethod—performance-based designof the whole building—permitstradeoffs between some components of the residence that impactenergy use. The ability to trade off amore efficient mechanical system forother components of the building,however, is not included in the listof permitted tradeoffs in the 2012IECC. This change from previouseditions of the IECC removed asignificant incentive to builders toinstall more efficient mechanical systems than what is currently requiredby federal law.Beyond not being able to tradeoff for the installation of moreefficient mechanical systems, theamount of tradeoff that is permitted for fenestration when followingthe UA alternate or whole buildingperformance compliance pathsalso continues to be capped in the2012 IECC. In the Northern climatezones (climate zones 6 to 8, whichcorrespond roughly with Wisconsinto Alaska), the U-factor, when tradeoffs are used, is not to exceed 0.40.In mid-level climates zones 4 and 5Fig. 3—Maximum U-factor and SHGC values for vertical fenestrationin commercial construction in the 2012 IECCFig. 4—Maximum U-factor and SHGC values for sklights incommercial construction in the 2012 IECC(Northern Tennessee to SouthernWisconsin), the U-factor is not toexceed 0.48. In Southern climatezones 1 to 3 (Tennessee on southto the tip of Florida), there is noU-factor cap, but the SHGC is notto exceed 0.50 when tradeoffs areused. When one of the alternativecompliance paths is used, the U-factor of skylights in climate zones 4to 8 is not to exceed 0.75. The sameSHGC cap of 0.50 that applies tovertical fenestration in climate zones1 to 3 also applies to skylights.The U-factor requirements discussed above for vertical fenestrationalso apply to exterior glass doors.Glass doors, by definition in theIECC, are considered to be doorswhich are more than 50 percent glassin area. If the door is equal to or lessthan 50 percent glass in area, it isconsidered to be an opaque door.Although opaque doors are includedin the definition of fenestration areain the 2012 IECC and 2012 IRC, theyare assigned a maximum U-factorof 0.35, separate from the U-factor requirements for glazing area.According to Table R303.1.3 of theIECC, this criteria is considered to bemet by any insulated, nonmetal edgeopaque door with glazing less than45% of the door area, if any glazingthat does occur in the door is doublepane. Also, one opaque door up to24 square feet in area is exempt fromthe maximum U-factor requirementin the 2012 IECC and 2012 IRC.The 2012 IECC and IRC requireair leakage resistance of windows,door assemblies and unit skylightsto be determined in accordancewith AAMA/WDMA/CSA 101/I.S.2/A440-11 or NFRC 400-09, similar tothe requirements in the 2009 IECCand IRC. The 2012 IECC also requiresair-leakage resistance of curtain wall,storefront glazing and commercialdoors to be determined in accordance with ASTM E 283-04.Previous editions of the IECC usedthe same pass/fail criteria for air leakage of window, door and skylightswww.WindowandDoor.com 141

International Code Requirements for Windows & Doorsin commercial buildings as that established by AAMA/WDMA/CSA 101/I.S.2/A440. The 2012 IECC, however, establishes more stringent criteria thanthat currently in place for certainPerformance Classes for windows incommercial buildings. Specifically,the maximum air leakage rate permitted for windows, sliding and swingingdoors, and unit skylights withoutcondensation weepage openings incommercial buildings is 0.2 cfm/ft²when tested at 1.57 psf. The maximum air leakage rate permitted byAAMA/WDMA/CSA 101/I.S.2/A440 forsome Performance Classes of fenestration is 0.3 cfm/ft² when tested atthe same pressure.Previous editions of the IECC contained separate provisions for metaland nonmetal framed windows anddoors other than the main entrancedoor in commercial buildings. Thisdistinction has been discontinued inthe 2012 IECC. The 2012 IECC establishes maximum U-factors for fenestration in commercial buildings basedupon whether it is a fixed, operable,or entrance door. Figs. 3 and 4 showthe maximum U-factor and SHGCpermitted for fenestration in commercial buildings under the prescriptive provisions of the 2012 IECC.EMERGENCY ESCAPE AND RESCUEOPENINGSBoth the 2012 IBC and 2012 IRCrequire emergency escape and rescueopenings in sleeping rooms belowthe fourth floor of a building, andin all basements except those thatare used only to house mechanicalequipment which are less than 200square feet in area. The 2012 IBCalso contains some exceptions to thisfor rooms in buildings that are fullyequipped with a fire sprinkler system,or for rooms that open directly to acorridor that leads to an exit in twodirections.The requirements for sizes, locations, etc., are set forth in Section1029 of the 2012 IBC and SectionR310 of the 2012 IRC. It is important142 Window&Door 2014 Buying Guideto note that the required openingsize of 24 inches high, 20 inches wideand 5.0 or 5.7 square feet in areamust be met by “normal” operationof the window, door or skylight without the use of keys, tools or specialknowledge, and without the removalof a second sash from the opening.Typically the emergency escape andrescue opening requirements are metwith operable windows or doors. Operable skylights and roof windows arealso permitted to be used as emergency escape and rescue openings ifthey meet the size requirements andthe bottom of their opening is within44 inches of the floor below.MINIMUM WINDOW-SILL HEIGHTSThe 2012 IBC and 2012 IRC requirethe bottom of openings created byoperable windows to be a minimumheight above the adjacent interiorfloor when they are more than 6 feetabove the grade outside the window.In the 2012 IBC, the required heightof that window sill above the adjacentinterior floor is 36 inches. In the 2012IRC, the required height is 24 inches.Both codes include an exceptionfor windows that do not open morethan 4 inches or that are equippedwith window guards that comply withASTM F2006-10 or ASTM F2090-08or window opening control devices(WOCDs) that comply with ASTMF2090-08. The WOCD must limit theinitial opening of the window to nomore than 4 inches, but must alsobe releasable with no more than 15pounds of force to open more fully.The intent of this later provision is topermit windows that are equippedwith WOCDs to also be used to meetthe Emergency Escape and RescueOpening requirements of the 2012IBC and 2012 IRC.MEANS OF EGRESS DOORSSection R311.3 of the 2012 IRC andSection 1008.1.7 of the 2012 IBCrestrict the threshold height of therequired exit door in residences to1½ inches or ¾ inch, dependingupon the type of door, from thetop of the threshold to the floor orlanding on each side of the door.The rise from floor or landing to thetop of the threshold at other exteriordoors within the IRC, and for otherexterior doors that are not requiredto be accessible or which do notprovide access to a Type A or TypeB unit within the IBC, is limited to7¾ inches, which is the riser heightpermitted for stairs.Section R311.3 of the 2012 IRC alsospecifies that the width of the clearopening provided by the requiredegress door is to be at least 32 incheswhen measured from the face of thedoor to the door stop at the jambof the opening, and the height ofthe clear opening provided is tobe a minimum of 78 inches whenmeasured from the door stop at thehead of the opening to the top of thethreshold.WINDOW INSTALLATIONSection R612.1 of the 2012 IRCrequires that windows and doorsbe installed in accordance with thefenestration manufacturers’ installation instructions and flashed inaccordance with Section R703.8. Section 1405.4 of the 2012 IBC requireswindow openings to be flashed “insuch a manner as to prevent moisturefrom entering the wall or to redirectit to the exterior.”Section R703.8 of the 2012 IRCgives more specific provisions for theinstallation of flashing around thewindow. It requires that flashing beinstalled in shingle-fashion in such amanner as to prevent entry of waterinto the wall cavity or penetrationof water to the building structuralframing components, and that theflashing is to extend to the surfaceof the exterior wall finish or to thewater-resistive barrier for subsequentdrainage.The 2012 IRC also references anAAMA standard for self-adhered flashing. Section 703.8 of the 2012 IRCrequires self-adhered membranes

used as flashing to comply withAAMA 711-07.SAFETY GLAZINGSection 2406.4 of the 2012 IBC andSection R308.4 of the 2012 IRCestablish the locations where safetyglazing is required. They include thefollowing: Glazing in and near swingingand sliding doors; Large lites of glass near walkways; Glazing around tubs, showers,pools and similar fixtures; Glazing near stairways, rampsand the landings for both.In these applications, the glazingmust be labeled per the ConsumerProduct Safety Commission CPSC 16CFR 1201 requirements. There aresome exceptions for applications thatare considered less hazardous, suchas openings less than 3 inches indiameter in doors, decorative glass,and glazing provided with a protective bar, etc.The previous exception for wiredglass in fire-rated assemblies thatcomplied with ANSI Z97.1 in otherthan educational-use groups hasbeen removed. In the 2012 IBC,wired glass is only permitted in doorsthat meet CPSC 16 CFR 1201, just likeany other type of glass. The 2012 IBCand IRC also permit the use of glassthat meets the two most stringentcategories of ANSI Z97.1 i

IRC represents an update from the previous reference to AAMA/WDMA/ CSA 101/I.S.2/A440-08 in the 2009 IBC, IECC and IRC. As in the 2009 IBC/IRC, the latest edition of the standard applies to windows and “sliding doors” in the 2012 IBC and 2012 IRC. Other types of fenes-tration assemblies not included within the scope of AAMA/WDMA/

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