Extreme Winds Test Wood Pole Strength _ Overhead Transmission Content From TDWorld
5
May 1, 2007 TWEET COMMENTS 0 Extreme Winds Test Wood Pole Strength Michael Engel, Midwest Energy; Richard Brown and Edmund Phillips, InfraSource Technology; and Nelson Bingel, Osmose | T&D World Magazine SEVERE WINDSTORMS OCCUR IN ALL PARTS OF THE UNITED STATES AND AROUND THE WORLD. Since 2004, the Southeastern United States has been hit with nine major hurricanes causing billions of dollars in damage to electrical and telecommunications infrastructure. And in December 2006, the Pacific Northwest experienced its worst windstorm in more than a decade, knocking out power to more than 1.5 million homes and businesses, and killing at least six people. State utility commissions are increasingly investigating the response of utilities after a storm and investigating infrastructure damage that occurs during the major storm. Utilities are taking notice and are beginning to consider the possibility of exceeding minimum safety standards so that structures will be less likely to fail during extreme winds. In August 2006, Midwest Energy (Hays, Kansas, U.S.) experienced a windstorm that blew down a 2mile (3.2km) stretch of wood transmission and distribution poles in western Kansas. All poles broke at the ground line. Thousands of customers experienced outages. After these failures, Midwest Energy had many questions, primarily related to the transmissionpole failures. Should these transmission poles have failed? Should the failures have occurred at the ground line? Did these transmission poles exceed their design criteria? Should inspections have identified these poles as being at risk for failure? Are there other issues related to the pole failures that are not typically considered during design and inspection? STRENGTH VERSUS LOADING Midwest Energy is a customerowned electric and gas utility that serves about 80,000 customers in central and western Kansas. It is located in what the National Electrical Safety Code (NESC) designates as the Heavy Loading District. This requires all structures to comply with winterstorm loading criteria for heavy combined ice and wind loading conditions: 40 mph wind with 0.5 inches (64 km/h with 13 mm) of radial ice on the conductors. In addition, when this particular transmission line was designed, the NESC required structures more than 60 ft (18 m) tall to withstand extreme summer wind loading: 90 mph (145 km/h) wind on bare conductor. The loadings are then factored differently for the grade of construction. (Note: A new design under the 2007 NESC would not be subject to greater loadings.) The transmission line with the failed poles was originally designed in 1983. It consists of 70ft (21m) Class 2 Douglas Fir poles set 9 ft (2.7 m) deep. Conductors are 477 kcmil ACSR attached at 57, 45 and 37 ft (17, 14 and 11 m) above ground with a 0.375inch (9.5 mm) steel shield wire at the top. To meet Grade B strength requirements, span lengths for this design are limited to 425 ft (130 m). The average span length is approximately 388 ft (118 m). For most short poles, the theoretical point of maximum stress will occur at or below the ground line. However, if most of the wires are attached near the top of a taller pole, the maximum stress point can be above ground line. As the location of the wire attachments spreads down from the top of taller poles, the maximum stress point moves toward the ground line. An obvious question was whether there was deterioration at the ground line, reducing the JUL 16, 2015 JUL 16, 2015 JUL 16, 2015 JUL 16, 2015 AUG 18, 2014 JUL 18, 2014 JUL 2, 2014 Connect View All Webinars » Latest News ARTICLE Finding Generation Options NEWS EEI and DOE Announce Initiative to Drive Veterans to Utility Industry Jobs ARTICLE Report from CIRED 2015 ARTICLE Marianna Vaiman: Protecting the Power Grid Project Spotlight: AMFC ARTICLE The Inside Scoop on the Advanced Meter Fort Collins Project INFOGRAPHIC 20 Questions to Ask Before You Buy a Smart Meter GALLERY HOME > OVERHEAD TRANSMISSION > EXTREME WINDS TEST WOOD POLE STRENGTH SHARE Subscribe About Us Magazine Issues Advertise Shop Electrical Jobs Today Newsletters Energy Times Overhead Distribution Overhead Transmission Underground T&D Substations Smart Grid Smart Consumer Renewables REGISTER LOG IN
description
pole test
Transcript of Extreme Winds Test Wood Pole Strength _ Overhead Transmission Content From TDWorld
-
7/17/2015 ExtremeWindsTestWoodPoleStrength|OverheadTransmissioncontentfromTDWorld
http://tdworld.com/overheadtransmission/extremewindstestwoodpolestrength 1/5
May1,2007
TWEET COMMENTS 0
ExtremeWindsTestWoodPoleStrengthMichaelEngel,MidwestEnergyRichardBrownandEdmundPhillips,InfraSourceTechnologyandNelsonBingel,Osmose|T&DWorldMagazine
SEVEREWINDSTORMSOCCURINALLPARTSOFTHEUNITEDSTATESANDAROUNDTHEWORLD.Since2004,theSoutheasternUnitedStateshas
beenhitwithninemajorhurricanescausingbillionsofdollarsindamagetoelectricalandtelecommunicationsinfrastructure.AndinDecember2006,thePacificNorthwestexperienceditsworstwindstorminmorethanadecade,knockingoutpowertomorethan1.5millionhomesandbusinesses,andkillingatleastsixpeople.Stateutilitycommissionsareincreasinglyinvestigatingtheresponseofutilitiesafterastormandinvestigatinginfrastructuredamagethatoccursduringthemajorstorm.Utilitiesaretakingnoticeandarebeginningtoconsiderthepossibilityofexceedingminimumsafetystandardssothatstructureswillbelesslikelytofailduringextremewinds.
InAugust2006,MidwestEnergy(Hays,Kansas,U.S.)experiencedawindstormthatblewdowna2mile(3.2km)stretchofwoodtransmissionanddistributionpolesinwesternKansas.Allpolesbrokeatthegroundline.Thousandsofcustomersexperiencedoutages.
Afterthesefailures,MidwestEnergyhadmanyquestions,primarilyrelatedtothetransmissionpolefailures.Shouldthesetransmissionpoleshavefailed?Shouldthefailureshaveoccurredatthegroundline?Didthesetransmissionpolesexceedtheirdesigncriteria?Shouldinspectionshaveidentifiedthesepolesasbeingatriskforfailure?Arethereotherissuesrelatedtothepolefailuresthatarenottypicallyconsideredduringdesignandinspection?
STRENGTHVERSUSLOADING
MidwestEnergyisacustomerownedelectricandgasutilitythatservesabout80,000customersincentralandwesternKansas.ItislocatedinwhattheNationalElectricalSafetyCode(NESC)designatesastheHeavyLoadingDistrict.Thisrequiresallstructurestocomplywithwinterstormloadingcriteriaforheavycombinediceandwindloadingconditions:40mphwindwith0.5inches(64km/hwith13mm)ofradialiceontheconductors.Inaddition,whenthisparticulartransmissionlinewasdesigned,theNESCrequiredstructuresmorethan60ft(18m)talltowithstandextremesummerwindloading:90mph(145km/h)windonbareconductor.Theloadingsarethenfactoreddifferentlyforthegradeofconstruction.(Note:Anewdesignunderthe2007NESCwouldnotbesubjecttogreaterloadings.)
Thetransmissionlinewiththefailedpoleswasoriginallydesignedin1983.Itconsistsof70ft(21m)Class2DouglasFirpolesset9ft(2.7m)deep.Conductorsare477kcmilACSRattachedat57,45and37ft(17,14and11m)abovegroundwitha0.375inch(9.5mm)steelshieldwireatthetop.TomeetGradeBstrengthrequirements,spanlengthsforthisdesignarelimitedto425ft(130m).Theaveragespanlengthisapproximately388ft(118m).
Formostshortpoles,thetheoreticalpointofmaximumstresswilloccuratorbelowthegroundline.However,ifmostofthewiresareattachednearthetopofatallerpole,themaximumstresspointcanbeabovegroundline.Asthelocationofthewireattachmentsspreadsdownfromthetopoftallerpoles,themaximumstresspointmovestowardthegroundline.
Anobviousquestionwaswhethertherewasdeteriorationatthegroundline,reducingthe
JUL16,2015
JUL16,2015
JUL16,2015
JUL16,2015
AUG18,2014
JUL18,2014
JUL2,2014
Connect
ViewAllWebinars
LatestNews
ARTICLE
FindingGenerationOptions
NEWS
EEIandDOEAnnounceInitiativetoDriveVeteranstoUtilityIndustryJobs
ARTICLE
ReportfromCIRED2015
ARTICLE
MariannaVaiman:ProtectingthePowerGrid
ProjectSpotlight:AMFC
ARTICLE
TheInsideScoopontheAdvancedMeterFortCollinsProject
INFOGRAPHIC
20QuestionstoAskBeforeYouBuyaSmartMeter
GALLERY
HOME > OVERHEAD TRANSMISSION > EXTREME WINDS TEST WOOD POLE STRENGTH
SHARE
Subscribe AboutUs MagazineIssues Advertise Shop ElectricalJobsToday Newsletters
EnergyTimes OverheadDistribution OverheadTransmission UndergroundT&D Substations SmartGrid SmartConsumer
Renewables
TDWorldREGISTER LOGIN
http://tdworld.com/webinarshttps://facebook.com/pages/Transmission-Distribution-World/110964078942390http://tdworld.com/underground-tdhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-01/current/displayhttp://www.electricaljobstoday.com/http://tdworld.com/td-workplace-learning-centerhttp://tdworld.com/news/finding-generation-optionshttp://twitter.com/sharehttp://tdworld.com/penton_ur/nojs/user/register?path=node%2F14061&nid=14061&source=emailhttp://tdworld.com/smart-grid/distribution-automationhttp://tdworld.com/about-ushttp://tdworld.com/smart-energy-consumerhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-08/current/displayhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-02/current/displayhttp://tdworld.com/penton_ur/nojs/loginhttp://tdworld.com/substationshttp://tdworld.com/renewableshttp://tdworld.com/grid-optimization-homehttp://tdworld.com/photo-galleries/advanced-meters-fort-collins-residential-meter-installation-galleryhttp://tdworld.com/newsletters-0https://penton.sub-forms.com/PEN6138_TWlandhttp://tdworld.com/vegetation-managementhttp://www.penton.com/PrivacyStatement/tabid/75/Default.aspxhttp://tdworld.com/smart-energy-consumer/utilities-call-centerhttp://tdworld.com/etrain/report-cired-2015http://tdworld.com/smart-grid/amihttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-14/current/displayhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-05/current/displayhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-06/current/displayhttp://tdworld.com/newsletters/signuphttp://tdworld.com/electric-utility-operationshttp://tdworld.com/smart-gridhttp://www.linkedin.com/groups/Transmission-Distribution-World-4078692?http://tdworld.com/http://tdworld.com/smart-energy-consumer/demand-responsehttp://tdworld.com/magazine-issues/td-worldhttp://tdworld.com/smart-grid/ems-scadahttp://tdworld.com/penton_ur/nojs/user/registerhttp://tdworld.com/etrain/eei-and-doe-announce-initiative-drive-veterans-utility-industry-jobsjavascript:void(0);http://enewspro.penton.com/preview/transmissiondistributionworld/TDW-11/current/displayhttp://tdworld.com/overhead-transmissionhttp://tdworld.com/advanced-meter-fc/inside-scoop-advanced-meter-fort-collins-projecthttp://tdworld.com/smart-grid/distribution-management-systemshttp://tdworld.com/etrain/marianna-vaiman-protecting-power-gridhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-07/current/displayhttp://tdworld.com/energy-timeshttps://twitter.com/tdworldmaghttp://tdworld.com/rss.xmlhttp://tdworld.com/etrain/eei-and-doe-announce-initiative-drive-veterans-utility-industry-jobshttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-10/current/displayhttp://tdworld.com/http://tdworld.com/smart-energy-consumer/billinghttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-13/current/displayhttp://videos.tdworld.com/http://tdworld.com/overhead-distributionhttp://tdworld.com/etrain/marianna-vaiman-protecting-power-gridhttp://enewspro.penton.com/preview/transmissiondistributionworld/TDW-04/current/displayhttp://tdworld.com/advanced-meter-fc/inside-scoop-advanced-meter-fort-collins-projecthttp://tdworld.com/advertisershttp://tdworld.com/overhead-transmissionhttp://url.fortinet.net/rate/submit.php?id=5845337268166F477A3468383C6A2623&cat=11&loc=http://tpc%2egooglesyndication%2ecom%2fsafeframe%2f1%2d0%2d2%2fhtml%2fcontainer%2ehtml&ver=6http://tdworld.com/webinarshttp://tdworld.com/etrain/report-cired-2015http://tdworld.com/infographics/20-questions-ask-you-buy-smart-meterhttps://event.on24.com/eventRegistration/EventLobbyServlet?target=registration.jsp&eventid=898145&sessionid=1&key=B3B13BE3F0B7C5C141770B8B5E7D8B03&partnerref=website&sourcepage=registerhttp://tdworld.com/infographics/20-questions-ask-you-buy-smart-meterhttp://tdworld.com/news/finding-generation-options -
7/17/2015 ExtremeWindsTestWoodPoleStrength|OverheadTransmissioncontentfromTDWorld
http://tdworld.com/overheadtransmission/extremewindstestwoodpolestrength 2/5
strengthatthislocationandcreatingapointoffailure.Thesepoleshadbeenregularlyinspectedandtreated,andvisualexaminationdidnotrevealthepresenceofsignificantdecay.Aforensicloadinganalysiswasperformedtotestwherethetransmissionlinesshouldhavebrokenassumingnodeterioration.Thiswasdoneintwostages:apolestrengthcalculationandapoleloadingcalculation.
Thepolestrengthiscomputedateachpoleheight.Thisisfirstdoneatthegroundlineusingstandardmethods.Thestrengthatallotherheightscaneasilybecomputedknowingthatthestrengthofthepoleatagivenheightisproportionaltothecubeofcircumferenceatthisheight.Polestrengthversusheightcorrespondstothetopofthegreenareainthegraphonpage37.
Thewindforceonthepoleateachheightiscomputedusingstandardmethods.Thisforceisthenusedtocomputethecorrespondingbendingmomentateachpositionbelow.Thesumofallmomentsateachpointcorrespondstothetotalbendingmomentatthatpoint.Assuminga122mph(196km/h)wind,poleloadingversusheightcorrespondstothetopoftheyellowareainthegraph.
ThisprocesswasperformediterativelyandthroughitMidwestEnergyfoundthata122mphwindisrequiredtoblowdownthepole,assumingthepoleisat100%strength.Thegraphshowsthatthepolestrengthexceedsthepoleloadingabovethegroundline.Thismeansthatagroundlinebreakcanbeexpectedforthisparticulardesign.
DETERIORATIONANALYSIS
TheNESCrequiresthatwoodstructuresbereplacedorrehabilitatedwhendeteriorationreducesthestructurestrengthtotwothirdsofthatrequiredwheninstalled.GradeBconstructionrequiresthatawoodpolewithstandatleastfourtimes(overloadfactor)theloading.Replacementorreinforcementisrequiredwhendeteriorationreducestheoverloadfactorbelow2.67.Fieldmeasurementsofseveralfailedpolesindicatethattheeffectiveoverloadfactormayhavebeenreducedto3.5.Furtherreviewofpoleinspectionreportsrevealedthatnofailedtransmissionpoleswererecommendedforreplacementorrehabilitation.
Assumingaonethirdlossofstrength,analysesindicateagroundlinebreakwouldhappenat99mph(160km/h)winds.TheNESCsummerwindcriterionis90mph(145km/h).Recordedmaximumwindgustspeed,measuredseveralmilesfromthelinefailure,was88mph(142km/h).Thisstillraisesquestionsaboutwhetherornotthesepolesshouldhavefallendown.
RADIALBORINGEFFECTS
ThepolesinstalledontheMidwestEnergylinewereborednearthegroundlinetoallowtheinitialpreservativetreatmentamoreeffectivepenetration.Approximately24boringswithadiameterofeither0.25inches(6.4mm)or0.313inches(7.9mm)extend4.5inches(114mm)towardthecenterofthepole.Theseboringsimpactpolegroundlinestrength,andthisstrengthreductionisnotaccountedforbecauseofthebenefitofimproveddecayprevention.
Strengthreductionestimateshavebeenmadeassuminga47inch(1.2m)groundlinecircumferencewith24boringsaroundthecircumferencewitharepeatingpatternthatextends2ft(0.6m)aboveand4ft(1.2m)belowgroundline.Calculationsshowthattheremainingstrengthfromthe0.25and0.313inchboringsisapproximately83.5%and79.8%,respectively.Becausethemaximumstresspointoccurredatthegroundlineofthefailedpoles,theradialboringslikelyaffectedthefailurewindspeed.
Throughboringisanotheroptionforanimprovedinitialpreservativepoletreatment.Theboringsrunparalleltothedirectionofthewiresandgoallthewaythroughthepole.A2005studybyOregonStateUniversitydeterminedthattheimpactstrengthwiththroughboringseemslessthanradialboring.Thus,throughboringmaybeanoptionforutilitiestoconsiderinthefuture.Resultswillbereviewedatthe2007annualmeetingoftheANSIO5committeetodetermineiftheimpactonnewpolestrengthneedstobeaddressedintheANSIO5.1newpolespecifications.
WOODPOLEMAINTENANCE
MidwestEnergyregularlyinspectsandtreatsitswoodpoles.Whennecessary,treatmentisaccomplishedbyboringholesnearthegroundlineandinsertinganaluminumtubewiththefumigantmethylisothiocyanate(MITC).Afterthe2006storm,theutilityraised
DEC10,2014
AdvancedMetersFortCollins:ResidentialMeterInstallationGallery 3
WEBINAR
Webinar1:InsideAMFCWatchOnDemand
WhitePapers
CanusCorporation:UtilityIndustryLaborSourcingStrategyCostAnalysis
IBMWhitePaper:GainingInsightfromIncidentAnalysistoManageFutureIncidents
MOREWHITEPAPERS
T&DWLearningCenter
HandbookofEnergyEngineeringCalculationsSOLVEENERGYPROBLEMSQUICKLYANDACCURATELY
AmericanElectrician'sHandbookSixteenthEdition
Foracentury,theAmericanElectricians'Handbookhasservedasthedefinitiveindustryreferencefor...
TemporaryGroundingforLineworkerProtection
Thisessentialsafetyreferenceshowshowtoinstallgrounds...
VIEWCATALOG VIEWSHOPPINGCART
Featured Video3MACCRCorrosionPerformanceHawaiiFieldTest
SHARE
SponsoredBy:
MORET&DTVVIDEO
http://tdworld.com/webinar/webinar-1-inside-amfc-watch-demandhttp://tdworld.com/carthttp://tdworld.com/temporary-grounding-lineworker-protectionhttp://tdworld.com/white-papers/canus-corporation-utility-industry-labor-sourcing-strategy-cost-analysishttp://tdworld.com/american-electricians-handbook-sixteenth-editionhttp://tdworld.com/photo-galleries/advanced-meters-fort-collins-residential-meter-installation-galleryhttp://tdworld.com/whitepapershttp://tdworld.com/handbook-energy-engineering-calculationshttp://tdworld.com/photo-galleries/advanced-meters-fort-collins-residential-meter-installation-galleryhttp://tdworld.com/whitepapers/ibm-white-paper-gaining-insight-incident-analysis-manage-future-incidentshttp://videos.tdworld.com/http://tdworld.com/photo-galleries/advanced-meters-fort-collins-residential-meter-installation-gallery#commentshttp://tdworld.com/temporary-grounding-lineworker-protectionhttp://tdworld.com/handbook-energy-engineering-calculationshttp://tdworld.com/american-electricians-handbook-sixteenth-editionhttp://tdworld.com/webinar/webinar-1-inside-amfc-watch-demandhttp://tdworld.com/cataloghttp://tdworld.com/video/3m-accr-corrosion-performance-hawaii-field-test -
7/17/2015 ExtremeWindsTestWoodPoleStrength|OverheadTransmissioncontentfromTDWorld
http://tdworld.com/overheadtransmission/extremewindstestwoodpolestrength 3/5
thequestionastowhethertheboringsfromthemaintenanceprogramwerehavingameasurableimpactonpolestrength.Forthetransmissionstructuresinquestion,fourboringsarespacedaroundthepolecircumference90degreesapartsothattheentirecrosssectioncanbetreatedmoreeffectively.Eachboringis6to8inches(150to200mm)higheronthepole,creatingaspiralpattern.
Onlyoneoutofthefourboringswillimpactpolebendingstrengthforaspecificwinddirection.Itisestimatedthatthereductioninstrengthresultingfromoneboringwillreducethepole'stransversebendingstrengthbylessthan5%.Thisisnotsignificant,becausetheaveragepolestrengthhasavariationofapproximately20%.Theinspectionandmaintenanceprogramwillcontinuesothatsupplementalpreservativescanhelpextendapole'susefullife.
DISTRIBUTIONPOLES
Thedistributionpolesthatblewoverwererightacrossthestreetfromthetransmissionlines.Thispresentedtheopportunitytoexaminetheabilityofthesestructurestowithstandhighwindsandtocomparetheseresultstothetransmissionstructures.
BothClass4andClass5distributionpolesfailed.Allfailedpoleswere35ft(10.7m)tallSouthernPinewood,set5.5ft(1.7m)deep,andhad8ft(2.4m)crossarmssupportingthreeprimaryconductors.Aloadinganalysissimilartothetransmissionanalysisshowed,assumingnostrengthdeterioration,amaximumwindspeedof144mph(232km/h)fortheClass4polesand128mph(206km/h)fortheClass5poles.Assumingaonethirdstrengthreduction,maximumwindspeedscorrespondto118mph(190km/h)and105mph(169km/h).
Basedonthedistributionpoleanalysisandconservativeassumptions,windgustspeedswerehighlylikelytobegreaterthan118mph(190km/h).Thisisclosetoexceedingthedesignstrengthofthetransmissionstructuresassumingnodeterioration(122mph),andexceedsthedesignstrengthofthetransmissionstructureswhenaccountingfora20%strengthreductionduetoradialboring.Inthiscase,itseemslikelythatthewindloadingssimplyexceededstructuredesignstrength.
Recallthatlocalweatherstationsonlyrecordedmaximumwindgustspeedsof88mph(142km/h)inthearea.Animportantlessonisthatlocalizedweathereffectscanresultinwindsmuchstrongerthanthoserecordedatnearbyweatherstations.Inthiscase,itispossiblethatamicroburstoccurred,whereprecipitationcooledairrushesrapidlytowardthegroundandthenspreadsoutatveryhighspeeds.Damagefrommicroburstscanbesimilartodamagefromtornadoes.
SYSTEMHARDENING
Hardeninginfrastructureforhighwindisanemergingbutimportanttopic.Ideally,autilitycancomputetheexpecteddamagethatwilloccurinfuturestorms,computethecostofvarioushardeningoptionsandcomputetheexpecteddamagereductionthatwillresultfromeachoftheseoptions.Thisprocessallowsfordecisionstobemadebasedonquantifiablecostsandbenefits,andgoesfarbeyondthedesignofastructuretoaspecificwindspeed.Possibilitiesforstrengtheningtransmissionanddistributionlinesincludestrongerpoles,upgradedpoles,shorterspans,smallerconductors,stormguying,pushbraces,lesspolemountedequipment,fewerthirdpartyattachments,aggressivetreeremovalandamultitudeofotheroptions.
Achievingtheproperlevelofinfrastructureperformanceduringhighwindsatthelowestpossiblecostisadauntingtask,butwillincreasinglybedemandedofutilitiesbytheirregulatorsandcustomers.Nowisthetimeforutilitiestostartcollectingdetaileddataonfailuresthatoccurduringextremeweather.Nowisthetimeforutilitiestoperformforensicinvestigationsonstormdamage.Nowisthetimeforutilitiestoquestionwhethertheuseofexistingdesignstandardsasthebasisofstructurestrengthwillresultinadequateperformance,orwhetherhardenedsystemsareintheirfuture.
MichaelV.EngelisthevicepresidentofengineeringandassetmanagementforMidwestEnergy.HeisformerchairofboththeMidwestEnergyAssociationElectricActivitiesandtheIEEEPlanningandImplementationCommittee.EngelearnedhisBSEEdegreefromKansasUniversityandhisMBAdegreefromFortHaysStateUniversity.mengel@mwenergy.com
RichardE.BrownisthevicepresidentofoperationsforInfraSourceTechnology.Heis
MoreJobs>>
FeaturedJobs
Bet You Haven't SeenThis
RooftopSolarisNotInherentlyCostEffective 4
Rooftopsolariswastingbillionsofdollarsperyearand
isn'tgreenaccordingtoacommentaryintheWallStreetJournal....
More
mailto:[email protected]://tdworld.com/renewables/rooftop-solar-not-inherently-cost-effectivehttp://directory.tdworld.com/http://tdworld.com/renewables/rooftop-solar-not-inherently-cost-effective#commentshttp://tdworld.com/renewables/rooftop-solar-not-inherently-cost-effectivehttp://tdworld.com/distribution/first-installment-quadrennial-energy-reviewhttp://tdworld.com/distribution/first-installment-quadrennial-energy-reviewhttp://jobs.electricaljobstoday.com/jobs/search/results?radius=0&view=List_Detail&sort=score+desc&rows=15http://tdworld.com/renewables/rooftop-solar-not-inherently-cost-effective -
7/17/2015 ExtremeWindsTestWoodPoleStrength|OverheadTransmissioncontentfromTDWorld
http://tdworld.com/overheadtransmission/extremewindstestwoodpolestrength 4/5
Site FeaturesMediaCenter
Subscribe
Newsletters
RSS
Sitemap
ViewMobileSite
Penton CorporateAboutUs
Advertise
TermsofService
PrivacyPolicy
Follow Us
Search TDWorld.com
EC&M ElectricalWholesaling ElectricalMarketing TDCompare Lineman'sRodeo
TDWorld.com
OverheadDistribution OverheadTransmission UndergroundT&D Substations SmartGrid Business SmartEnergyConsumer
Renewables
Related Penton Sites
PRINT REPRINTS FAVORITE EMAIL
TWEET
NAME: Anonymous
SignInorregistertouseyourTDWorldID
EMAIL:
YOURCOMMENT:*
anIEEEfellow,vicechairofitsPlanningandImplementationCommittee,andauthorofthebookElectricPowerDistributionReliability.HeearnedhisBSEE,MSEEandPhDdegreesfromtheUniversityofWashingtonandhisMBAdegreefromtheUniversityofNorthCarolina.richard.brown@infraSourceinc.com
EdmundG.PhillipsisanadvisorforInfraSourceTechnology.HeearnedhisBSEEandMSEEdegreesfromFloridaInternationalUniversity,wherehewasawardedElectricalEngineeringGraduateoftheYear.edmund.phillips@infraSourceinc.com
NelsonG.BingelisthevicepresidentofengineeringforOsmoseUtilitiesServices.HeischairmanoftheANSIO5Committee,whichisresponsiblefornewwoodpolespecifications,andisaprincipalmemberoftheStrengthandLoadingSubcommitteeoftheNationalElectricalSafetyCode.HeisagraduateofPurdueUniversity.
DiscussthisArticle 0
SUBMITCOMMENT
Related Articles
TheScienceofPoleSelection
AussieWidgetMeasuresWoodPoleStrength
PoleTestingEnsuresHighReliabilityandLongLife
HardeningUtilityLines?
CompositePolesSupporttheCircuitoftheFuture
COUNTRY*
EMAIL*
Signuptoreceiveourfreenewsletters
Energizing(Weekly)ViewSample
TheSmarterGrid:Initiatives,Insights,Innovations(BiWeekly)ViewSample
Test,Monitor&Control(BiWeekly)ViewSample
ProjectsinProgress(Monthly)ViewSample
Etrain(BiWeekly)ViewSample
GridOptimization(Weekly)ViewSample
VegetationManagementInsights(Monthly)ViewSample
ProductInsider(Monthly)ViewSample
ExperienceStationNewsletter(Monthly)ViewSample
DailyEnergyFix(Daily)ViewSample
IEEEPESShowUpdate(ShowDaily)ViewSample
TheEnergyTimes(Weekly)ViewSample
UnitedStatesEnteryouremailabovetoreceivemessagesaboutofferingsbyPenton,itsbrands,affiliatesand/orthirdpartypartners,consistentwithPentonsPrivacyPolicy.
SHARE
http://tdworld.com/mediahttp://tdworld.com/overhead-distribution/aussie-widget-measures-wood-pole-strengthhttp://tdworld.com/substationsmailto:[email protected]://www.penton.com/GeneralTermsofService/tabid/187/Default.aspxhttp://tdworld.com/archive/science-pole-selectionhttp://tdworld.com/renewableshttp://tdworld.com/penton_ur/nojs/user/register?nid=14061&source=printhttp://tdworld.com/penton_ur/nojs/user/register?path=node%2F14061&nid=14061&source=emailhttp://tdworld.com/archive/pole-testing-ensures-high-reliability-and-long-lifehttp://tdworld.com/energy-timeshttps://twitter.com/tdworldmaghttp://tdworld.com/underground-tdhttp://tdworld.com/about-ushttp://tdworld.com/penton_ur/nojs/user/register?source=comment&nid=14061http://electricalmarketing.com/http://tdworld.com/overhead-distribution/hardening-utility-lineshttp://tdworld.com/newsletters-0http://tdworld.com/rss.xmlhttp://tdworld.com/userhttp://www.penton.com/PrivacyStatement/tabid/75/Default.aspxhttp://tdworld.com/overhead-distribution/composite-poles-support-circuit-futurehttp://tdcompare.com/http://ecmweb.com/http://tdworld.com/advertisershttps://penton-sub.halldata.com/site/PEN005631TWland/init.dohttp://tdworld.com/device/mobilehttp://tdworld.com/penton_ur/nojs/loginhttp://ewweb.com/https://facebook.com/pages/Transmission-Distribution-World/110964078942390http://tdworld.com/sitemaphttp://www.linemansrodeokc.com/mailto:[email protected]://tdworld.com/smart-energy-consumerhttp://tdworld.com/smart-gridhttp://tdworld.com/overhead-distributionhttp://tdworld.com/overhead-transmissionhttp://wrightsmedia.com/sites/penton/electrical-systems-energy-construction/http://tdworld.com/http://www.linkedin.com/groups/Transmission-Distribution-World-4078692?http://twitter.com/sharejavascript:void(0); -
7/17/2015 ExtremeWindsTestWoodPoleStrength|OverheadTransmissioncontentfromTDWorld
http://tdworld.com/overheadtransmission/extremewindstestwoodpolestrength 5/5
Copyright2015Penton
http://penton.com/javascript:void(0);
