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Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 1
Technical Issues and Update MarkS.Graham,NRCAVicePresidentofTechnicalServices
Georgiacoderequirements
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 2
ProfessionalRoofing,December2011
Link
Interna1onalEnergyConserva1onCode,2009Edi1on(IECC2009)
4
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 3
ClimatezonesIECC2012,SecQonC301andSec.R301—ClimateZones
5
Roofing-specificadapta?onofTable402.1.1Interna)onalEnergyConserva)onCode,2009Edi)on(ResidenQalbuildings)
Insula?onandFenestra?onRequirementsbyComponenta
Climatezone CeilingR-value
1
302
3
438
5
6
497
8aR-valuesareminimums.…[Otherfootnotesomi]edforclarity]
6
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 4
Roofing-specificadapta?onofTable502.2(1)Interna)onalEnergyConserva)onCode,2009Edi)on(Commercialbuildings)
OpaqueThermalEnvelopeAssemblyRequirements
Climatezone
Roofassemblyconfigura?on
Insula?onen?relyabovedeck
Metalbuildings(withR-5thermalblocks)
APcandother
1 R-15ci R-19 R-30
2
R-20ciR-13+R-13
R-38
3
4
5
6
R-13+R-197R-25ci
8 R-49ci=ConQnuousinsulaQonLS=Linersystem(aconQnuousmembraneinstalledbelowthepurlinsanduninterruptedbyframingmembers;
uncompressed,facedinsulaQonrestsontopofthemembranebetweenthepurlins)
7
WinddesignforroofassembliesSpecifyingawindwarrantee,initself,
isnotproperwinddesign
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 5
Properwinddesign• Determinewindloads– IBCCh.16-StructuralDesign– ASCE7-10,“MinimumDesignLoadsforBuildingsandOtherStructures”
• Designforresistance– FM4474– UL580orUL1897
IBCrequires(Sec.1603)designwindloadstobeshownintheConstruc)onDocuments
Designwindloaddetermina?onwww.roofwinddesigner.com
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 6
FM1-28hasbeenupdatedwww.fmglobaldatasheets.com
• October2015update• BaseduponASCE7-05withenhancements
• Reforma]ed• BecauQousofFM-insuredprojects
• SeeProfessionalRoofing,March2016
ProfessionalRoofing,March2016
• UseRoofNav’sraQngscalculator
• Applya2.0safetyfactor• Roofoverhangfactors(Table7)
• WindbornedebrisseparaQondistances
• Roof-mountedequipment(ASCE7-10)
• Tornado-resistantdesign(Appendix)
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 7
ComparingFM1-28toASCE7-05andASCE7-10
Document Basicwindspeed(mph)
Designwindpressure(psf)
Zone1(Field)
Zone2(Perimeter)
Zone3(Corner)
FM1-28(withoutSF)
v=12043 72 108
FM1-28(w/2.0SF) 86 144 216
ASCE7-05(withoutSF)
v=12038 63 95
ASCE7-05(w/2.0SF) 76 126 190
ASCE7-10Strengthdesign vULT=150 59 99 148
ASCE7-10ASD(withoutSF)
vASD=11635 59 89
ASCE7-10ASD(w/2.0SF) 71 118 178
Example:AmanufacturingbuildinglocatedinNewOrleans,LA.Thebuildingisanenclosedstructurewithalow-sloperoofsystemandaroofheightof33o.ThebuildingislocatedinanareathatiscategorizedasExposureCategoryC.
ASCE7-16(publicreviewdra[)
• Revisedbasicwindspeedmap• Changes(andnew)pressurecoefficients• RevisedperimeterandcornerzonesExpecthigherfield,perimeterandcorner
upliMpressures
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 8
ASCE7-10basicwindspeedmapFig.1607A--VultforRiskCategoryIIBuildings
ASCE7-16(dra[)basicwindspeedmapRiskCategoryIIBuildings
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 9
GCppressurecoefficientsh≤60o.,gableroofs≤7degrees
Zone ASCE7-10 ASCE7-16(dra[)
1’ -- -0.9
1 -1.0 -1.7
2(perimeter) -1.8 -2.3
3(corners) -2.8 -3.2
Zonesh≤60o.,gableroofs≤7degrees
ASCE7-10 ASCE7-16(dra[)
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 10
ProperwinddesignisoMen)mesavoided…andit’sonlygoingtogetmorecomplicated
TheNRCARoofingManual
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 11
NRCAApp
• NRCAAppavailableontheAppleStoreandGooglePlayStorefortablets
• iPhoneAppalsoavailable• RegisterwithinAppasbeinganNRCAmember
• TheNRCARoofingManualisviewabletoNRCAmembers
• Favoriteandsendpagesfeatures
Manualonlinewww.nrca.net
• AvailabletoallNRCAmemberregisteredusers(mulQpleuserspermembercompany)
• “Membersonly”secQon,clickon“Myaccount”,the“Electronicfile”
• View,downloadandprint
Technicalissues&update Juen9,2016
NRCARoofingIndustryRegionalSummit 12
Mark S. Graham
Vice President, Technical Services
Na>onal Roofing Contractors Associa>on (NRCA)
10255 W. Higgins Road, Suite 600
Rosemont, IL 60018
(847) 299-9070
www.nrca.net
TwiVer: @MarkGrahamNRCA