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05/15/01 TUE 05:46 FA% I�004 <br /> �ay-11-ZODi 1�:OZam From-CITY OF•ORONo +g5ZZ4946i6 T-OZ7 P.004/005 F-B95 <br /> �071 Yrv��wa�r✓��-� . <br /> I • � . <br /> ��df�G/�1�0�2 � <br /> TWo excepdom p�u�vide for�idviced venatavon under cectain Fxc�pt for Group R.Division 3 �►d Group U Ovc�cies� <br /> condidons-These ezccpnons�s�e b�permiued�a�da dx De- d�codo prohibics ivof dtainagc wa[rx�ro�n a bwZaiag[o Aow <br /> �-/ pa:tmenc of Hoasiag and Urb��lopmenc minimua�praper� over public pa�p�rq►.71�a in�ant is aot aecessadly pr�►�naing <br /> [y sca�datds and►hc CABO On�and T►vo Farnily Dwe7lin,g Code &ait►�ge ws�at fra�flowit�g evet'p�tblic p�apeity"in gencrdl. <br /> pormaay years wi�oui nap,��ve zxpzeienae and.tbus.represeat bu�rathe��revendng draia�e N►aoa from flowmg ov�r a sid� <br /> etcepcable al�crnatives_ , a►alk�or ptdesQia�walkway c6a�Is between eh�buuldib8 end d1c <br /> pvblic sweet a��hezoug4fa�e. <br /> , lbere ane at ksst two probleios tbat eri�e vrt►en roof dwina,� <br /> S�CTION 7506--ROOF DfiAINAOE a+�'is allowad�o floy►wer a public sidewal� <br /> � i- Undec pYopet eonditfoas ot L�hc and uampasoua. algae <br /> Pes;xive mof drain�e i�r�eqy;red fo�es�"l1QaUy two re�tsons- wili fo�w6oie che wa�cr$o'ws saoas t'�e,sidew8lk aAd <br /> 1. ?o pravaac ponding of�+s.�ccr and tl�consogv�et rapid de- create a h�dous.slippery wa�hng su�fact. <br /> [eriorarion of th�roof-�a��ariug ma�al,including po�ao- ? Durin$heavy tsIDsw�ms.the velodry and fioroe of�e a►� <br /> dal for earlr failura oF�t�;roof covetipg. ur�rmiairg fra�th�drai�ca�,�rea�e ha�ous wallang <br /> 2_ To prevenc ponding an��e resulaag failure ef c6t roof coadirions fur ped�esoriae�s. <br /> soKcnu+e e�� alternad�•e�y. d�e deR►u�d for ine[eased The.eefore,the usual p�ocedme is m carry tbe mo+f deain lines <br /> SR'engch of�toof SQuce�u�c w wppor�ponding inside d�building�6 th�wsll of che b,alding and Wndet the <br /> A1rlwugh tbe U8C offe�s �:aloecnadve af sav�rel]y de- sidewalk�rougb a curb e�pening inm tbe gunrr. <br /> sfgning$r�f w snpporc any ��cumuladon of water e�mofs� <br /> wacer pondin�is highiy deulrcu:<�ral co tbc roof cov�ing and,as SEG770N 150T—aoo�-coveqiNG au►t�Ara�s <br /> a rP.,�uh.rha roof must be desi�,-�d wi�h a�ive dtaina$e slape <br /> of►/,unic veracal w 13 unia hnrizonnl(396 slope).This dtain- AND APPLICATI�N <br /> a�e slope genrrally ws�l p�ovid.a posi�i�e d�ainag�e sad w�l ro� I50?.2 Idaiei�inboo.CzrrBinly�uoofing msrerials mus�com• <br /> ��'"�P°°��' pIy wich gaaliry s�ar�dards�nbodiod in d�e UBC s�and�rds for <br /> v�th�re�he poof does not dr�ir vver�he adge.�CJBC roquires C6apar 15.Fur�hecmor�e,ideAdfica�ia�n of the mofing maaa'ia1� <br /> soof draias w be�ovided at e:s�t►low poine of ckre roof.�� i�mandaw�►ia oed�t'w v�ify thu�e�r co�nply wirh�}►e 4ualiry <br /> cbe da' of nc�noof drrins s:-�id be sach as io con �6�e w�. s�andards. <br /> [rr -��aeeca � u�anr oo . <br /> `�� n- Y enea5,such ss chc'�"ou[h.wesc,lu�ve mfi�equ.ent rsin- In addicion to bearing rhe manuEe,c�urer s label or ideociCying <br /> �f.aad it is qui�t pzobaEk drac��oof drai��s will ba�blockad maz�k on�he marMial.prap�d r�oo�ng and builaup zootuy�n� <br /> due Lo ah a�uu►ulsuon of laav.�s and otDer dzbris.FoC thli�a- ���1ui�ed by du cod�io a,�try a label of an ap�oved <br /> r�on d�e CBC Ta�uir�ti►sc ov�-�;low drains be providzd for ench �ncy having�savicx for ins on of ma�erial and�it�isf� <br /> mof drsia lho inle�flow lind cl the ovzetloa drain musc be lo- ����"�g�'���- 's,in es9a�ce,refers�o�c in- <br /> catzd ao more tban�inc6es(Sl anm)abov2 d'le low poia�of�e �don ses�+ice�pro�ded b otg2�izarinns such a>Underwti[ <br /> roo� ers Lsbo�stosies Ync. (UL�and Faetory Muussl(Fbn.Ot�er <br /> organi�ons also provido chis rypa of strvire�aad�hey can ba <br /> Wbeu the rnof drain is loe:,�w3 a4iacen<<o a parapec wsT],nc� de�a�mined by refeiri�� w rhe avalusrioa repor�s issued by <br /> code pcovides thae overAow s�upp�rs in tha adjacenL P�� ICBO ES. • <br /> may ba u3od�pRovided iheY ha.ye an area �hr��s �ha�r�e- $eeausa UL and FM gtnelally do noc provid.inspecdon a�d <br /> quired far�e rovf dcaia sn�d c}� Inl�t flow liae is]ocauzd no labellt�servioes for sbingles(excepe wt�en spoeifically a+csud <br /> mor��Z incbes(Si mrN 3q,c,va me low poiA�of che rovf. foc fac reeardmney),the code requires chat�be ideud�ed <br /> y nn.alarnaoe w the sepamtr-Qvc�'low scupper and roof drain by an appcovtd inspecrioh but'eau or agen�cy sbo�►ius�be arode <br /> is w pravide in oac scuppa�x�tnbined ovedtew�nd d�aia.Fig- of rhe materisL The ase of che w�d•'appsovtd"by zhe cod�in- <br /> urt 1506-1 sbows a sch�madc zle�'1 of this rype of d�sin.The �nds �o eonvey �he meaaiag e�cablisbod�for che de�'mido�oE <br /> opeaing is fouc umes dis req,�-�d drain 51ze—ohe dme fa��6e •'spprovad" in Cbap� 3. These agencios are quioe oft�n <br /> d�ain icself and duoe tiracs wc t6e reguired overFtow a+i�h a exaQe-rela�ed agencies�d tbcir tis�cao be found ia�he evabr <br /> mininnna lu6gltt of-0�inches(l�fii2 mtq).T1��s�cail bas tbe ad- r�ion nposzs o�IC$O ES_ <br /> vat��ge o�erzaong f�ewe�hok•s in d�e rooF d�ac a�+e pooenaal ava- q��t is roq�ic+ed by the eods t4 eany m�oA indi�[- <br /> nues of I,ak�.It is also of sv$i�i�ent size w prevea�r�s a�cvawla• iag�he flasb.polm of chC anaxzria�and[be nsme of the manufao- <br /> dop of nash aad debris-For�1,i,;�Pc eE de�sil.flashing�us�be amr.Fires ip roofing'ksttl�s at�jobsirs oxnr ofiaea eaou,Qt►ro <br /> eazrtaUy darailed ar�d�xecu�ai in rho field �o easure�rhe �C�C��ve l�ai�fc A9S�l QojOt be ideud6od. <br /> flashing �nds up �c para��[ abova thc highest probable <br /> wa«slinz at�te low poinL of�hz roof. Farous �+ooSng msc�rials sub f�eaecs ia gcnaal are m <br /> To�c�wn the iiu�enc af�he ct?�ie.che LTBC s�e �at over- qui=ed by rhe codc w be comosion�esist�t Clcazly,nc�roof Wn71 <br /> q�� be svbjec6ed W Asaistute a�d, th�a�, cot=+osiw►,resls�a <br /> flow dc8ins bc conqoccad w disin lincs d�a[ sa�independent maaberials aad fasr�ners are nq�. <br /> � fr�m t5e roof dreins.If the e��dswias are conaecord w a com- <br /> � mon dtaitt line,it io�comes easilY appe�u�hat a blotkage of� 15073 tbroogb 1507.]r1�l�,pplicstio�. U�rm Blt�ldr�g Cod� <br /> �on dram lioe woald a�ecF'baeh�he�of dtsin md�e ova- Tabtes 15 8-1 thmugh 15 F eoncatn i�he 6ssie�quarmmez o� <br /> flow aad woubd ds�feat�be pucp�e�se af d►e ovetflo�v. �c UBC foc�bc insealtaiioa of du various:nof-oov�ng maa=N <br /> 258 � <br />