Roof Drains Technical Data

1 roof DR AINTEC HN ICA L DAT A SECTIO NCUSTOMERDRIVENSMITH DEFIN IT ION - ORIG IN - USAGET hemodernroofdrainis designedtodrainoffrainwaterin themosteffec-tivemannerpossiblewhilemain taininganaestheticappealbecauseinmanyins tancesit is placedin ,Smithhasattemptedtosatisfyboththeartist iceyeofthearchitectandthecalculatingmind oftheengineer,concludingtheproperlydesig nedroofdrainmusthavethefollowingfeatures : Pleasingdomeshapewitha lowprofileandadequatefreedrainagearea Corrosion-resistingdomematerial Effectivedebrisprotection Overflowdrainagetoallowdrainageduringdeb risbuild-up Gravelstop PositiveFlashingClamp Seepagecontrolchannels Sumpdesignedtominimizeairentrapment CAL SM IT H ROOFDRA PolyethyleneDome7 DrainBody2 CombinedCastIronFlashingClampandGravelSt op8 SumpReceiver3 SecuredSquareHoleGrate9 UnderdeckClamp4 Flashing ClampforSquareGrate10 AdjustableExtensionSleeve5 FixedExtension11O-RingGasket6 FixedExtensionGasket12 Reversible Collar13 NeopreneGasketROO F DR AIN PARTSLI

2 CALCULATINGDRAINAGEREQUIREMENTSFOR .0104x R x GallonsperminuteR = Rainfallintensity- inches/hourA = Roofarea- Conversionfactor- for1"(one) " , .0104x 4"x 100, = 4, :a 4"leader[2] , 144= ( )29- 4" Table2: a 6"leader[2] , 424= ( )10- 6" VERTICALLEADERSAND HORIZONTALSTORMDRAINSALLOWABLEFLOWIN [2] [3][2] [4]HORIZONTALSTORMDRAINPIPEVERTICALSLOPE PER FOOTSIZELEADER1/8"[3]1/4"[3]1/2"[3]02231 0152003673448680414478110156052611391962 78064242223144450891347867795610 8601214172112 13841953276815 247334914946 SEL EC TING A ROO F DR AI NToselecttheproperroofdrain,thefollowing informationmustbedeter-minedbythedesigne r/specifier.

3 Typeofroofconstruction Roofpitch Maximumvolumeofexpectedrainfallandstormd esigncriteria(Thisinformationmustbeobtai nedfromyourlocalweatherbureauand/orlocal codeauthority) Desiredrateofdrainage Safetyoverflowrequirements( is recommendedtoprovidea 1 to1 ratio) Roofload(Themaximumpossiblerainwater[bui ld-up]loadshouldbedeterminedandprovidedt othestructuralengineerforinclusionin theroofstructuredesign) Locationofdrains(Consultyourlocalcodereq uirements) Size Vandal-proofing NOTE:ALWAYSCONSULTYOURLOCALCODEFOR SIZINGANDDESIGNCRITERIAWHENDESIGNINGTHE PRECEDENCEOVER CATA -LOG INFORMATION. DATA SHOWNIN TABLES1 AND 2 BELOWARE TAKENFROMTHEUNIFORMPLUMBINGCODE(UPC) - 2006 GEST ED STEPSFOR SE LEC TING PROPERROOFDRAI N LE ADERSIZES AN D NUM BER REQU IR ED FOR A GIVENROO F1.

4 Determinethemaximumhourlyrai nfa ll inin ches. (T hefigurecanbe acquiredfromyou r localweatherbureauand/orlocalcode au thority .)3. FromTable1,determinethenumber ofsquarefeetthatcanbe drainedbyon e roofle ad erat thelocalmaximumrainfallrat Divide thetotalroofar eabythear ea th aton e le aderwil l handle . Theaboveresultisth e nu mberofroofdrainsrequiredforthebu ilding. If theresult is a fractionless,useth e nexthi amp le: Usi ng a 4" VerticalLeader1. Totalroofarea- 500'by200'=100,000 Determinerateofrai nfall- forthisexampleuse4" .3. Afterstudyingbuildingplanandphysicalarra ngement,assumethat4"leadersarere qui re d forthi s FromTable1 - one4"leaderat4"rateofra infa ll will takecareof3, ofro of are Numberofroofleadersrequiredis 29(1 00,000 di videdby3, ),There fore29roofdrainswouldbere qui re le: Using a 6"VerticalLeader1.

5 Tota l roofarea- 500'by200'=100,0 00 Dete rminerateofrainfall- forthisexampleuse4".3. Afte r studyingbuildingplanandph ysicalarrangement,assumethat6"leadersare re quire d forthi s From Ta bl e 1 - one6"leaderat4"rateofra infa ll will takecareof10, ofro of are Numberofroofleadersrequiredis 10(1 00,0 00 di videdby10, ),There fo re10roofdrainswouldbere quire de rs SizeMaxi mu m Allo wab le Hor izo ntal Pr ojected Ro of Area[2 ] [4]Ope nSqu are Feet at VariousRai nfal l Rates [1]Pipe SizeAreaInche s SQ. R. 2 IN ./H R. 4 IN ./ IN. /H ,1761, ,4403,2202,1471,6101,2 881,0730412.

6 5613,8406,9204,6133,4602,7 682,3070519 .6025,12012, 56 08,3736,2805,0 244,1870628 .3040,80020, 40 013,60010,2008,1 606,8000850 .2588,00044, 00 029,33322,00017,60014,667TA BLE 1RO OF DRA IN VE RTIC ALLEA DER REQ UIR EME NT S FOR HORI ZONTALROOF AREAS AT VA RI OUS RAI NF ALL RATESTA BL E 1 IS BASED ON TABLE 11 -1 FR OM THE UNIF ORM PLUM BING CODE(UPC) - 2006 EDITION[1]Forrai nfall ra tesothertha n th oselisted,de termin e th e allowablero ofar eabydividingthear eagivenin the1 in. d ra in fa ll LE 2 IS BASED ON TABLE 11- 2 FR OM THE UNI FORMPLUM BINGCO DE (UPC ) - 2006 ED ITI ON.

7 [2] Thesizingda taforve rt icalco nd uct or s, le aders , anddrains ar e ba sedonthepipe s fl owing7/24 full . Headof wateroverdrainwilldetermineexactflo w ra te s.[3] Thesizingforthehorizont al pip ingis ba sedon th e pipes flo wing full.[4] To av oidseverehydraulic ju mpand /orbackpre ssure,goodengineer ingpr acticerequire s theve rti ca l lea de r transitionintoa lar gersize horizontalst or mdrain pertheGPMflowind icatedin Table 2 for1/8"and1/4" slopedst or ER FLOW DR AI LineRoofSurfaceROOFSLAB21/2"HighSolid Water NDA L PROOFI NGIllustratedis a typicalwaterprooftrafficbearingdeck co veringinstallationandanexampleofthe"dimp ling"eff , ,is usuallypreferredtotheinteriorstandpipeov erflowdrain, , IN TR OL roof DR ,withtemporaryretentionofrainwateronther oofuntilthestormabates, ,quantityandlocationofRAINTROL.

8 Whethertheyareattheroofdrainoratthevents tack, is thefinishedlookof anyroofandaredesignedwitha ventopenareatopipearearatioof3 DEC KIN DIR EC TWASTE RE CEPT OR SROOF-CEPTORS roofareasto receivewaste-waterfromairconditioninguni ts, 1/2" IX DXDesignatesa , regularlyfurnished4"in approximately3/16"thickandmaybeappliedov ermanysubsurfacessuchasconcrete, ,usedforrecreationalpurposes,balconies,a reaways,plazas,sundecks, requiredondrainsotherthanthoseshowninthi ssection, minimum4"widthwitha 3/16" water-proofdeckcoveringthicknessis greater(orless)than3/16 , "dimpling" "Dimpling"..CONCRETE DE CK INSTALLATIONST ypica l Deck Dra in withNickelBronze FlatGrateTypicalDeckDrai n withBucketandNi ckel BronzeFl at GrateNO TE :For Wood DeckIn stallati ons , See pg.

9 Tandpi peTypeOverfl owDra Dam Typ e Overfl owDrainSerie s 108 3-108 9-R ai nt ro l roof DrainDX124 0 See Pg. 1-1 1 See Pg. 1-1 1 Fig. 1748 Vent CapSee Pg. 1-18SI PHON IC ROOFDR AINCUSTOMERDRIVENSMITH PipeSpeedi-SetGasketNO-HUBBodyCaulkBodyS peedi-SealGasketNO-HUB ClampNO-HUB BodyPipePipeOakumLeadCaulkBodyPI PE CO NNE CTI ON SINSIDECAULKOUTLET-CSpeedi-SealSpeedi-Se t-LGASKET OUTLETNO-H UB CONNECTI ON-YA siphonic roofdra in lo oksmuchlik e a traditionalro fe atureofa siphonicroofdrainis theairbaffle. Thisair ba ff le is en gineeredandtestedtoprevent airfromenteringth e piping syste mat peakfl an th e baffle,a siphonic ro ofdrain ha s thesamefeatures asa tr ad itionalroof dr ainincluding a drainbody,flashingring,do mestrainer, andfasteninghardware.

10 Incontrast to tra dit ional ro ofdrains, siphonic ro ofdr ainsarenotdesigned witha la rgediamete r or deepsu mpbo wlbecausetheir op erationis bymeansofsub-atmosphe ricpressurege nerat edatth e undersi deofthebafflean d out theroofis de pe ndentonlyontheresistan cevalue ofthedr ainassembly whileop eratingunder si phoni c co scousweireff ectofthedrai n body becomesminoran d thefl ow is deter-minedby simpl e inert ial hydraulic ef fectof flo w fr oma hi ghpr essure (at mospheric pre ssure atthero ofsurface)tolowpr essure (wi thi n thepi pi ngsystem).Unl ikea tradit ional ro ofdrain system,a siphonicsystemisde signedto opera te wit h th e pi pi ngcompletelyfil ledwi thwaterdur inga rai nstorm.