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nbb� <br />roinrcm rr(�Gj.mm <br />r•c�:u��� iz.?oo; <br />'I'ony Lcc <br />Plans Gsamincr <br />City of Iivurott <br />1'aiginccring / Public ticr� iccs Dept. <br />3200 Ccdar Strcet <br />Bvcrett, �VA 9R201 <br />i;��� ��-�;a� <br />Subjcct: Clarilicatiun ol Gruup �' Parking �;;ir;igc Rrquircmcn�s <br />Dcir'fony. �o20�i.a� 7 <br />�G�c�����v��� <br />�EB 1 8 2009 �� <br />c„�� , . � <br />Perrn � �p � C��S••�.,r. <br />I cd I3uddcn Icli a voicc mess;igc �cilli Ihc Garagc Prujccl \1:m;igcr Ibr NA i\lottcnsnn <br />rep;irding scction I:A(1�-7in thc '97 U13C codc. l�cd quolcd Ihis scction of lhc rndc for Group <br />ti I';irking G:iragcs anJ nolcd thcrc is a rcquiremcnt �hat "conncctinc oflices. ��;�iting rooms. <br />tickct booths and similar uscs sh;dl bc supplicd wi�h conditioned air undcr positivc pressurc.. <br />I Ic ihui askcd thc qucstion if �hc s�airs, cicvator shalis, and cicvator lobbics arc also <br />..pressuriud...� No, ihc Ul3C docs not rcquirc thc slaiis, clevaror shatis und lobbics in thc <br />car;igc to hc pressurizcJ. <br />1. 'I'he code only requires.;taincay enclosures to he pressurized in high rise buildines. <br />13uildings with Iloors morc ihan 75 fict abovc thc lo�rest Icvcl of �irc departmcnt <br />acorss rcyuire smokc proof cxit cnclosivcs. Stainva�� prcssurization is dic most <br />com�non mc�hoJ o�lnccting thc rcquircmcn�s lor a smokc pronf cnclosurc. Src .ccrriun <br />IOOi.9..i. ;. l'hc g:uagc is mostly bdo�v cradc. Only thc roof or plaza on top of thc <br />�ar:igc is abovc gradc by approcim;ucly 14' on Ihc Sou�hcast cnrncr. <br />'. I loist�cays rcquirc cithcr pressurization or a lobby in t�va condilions in thc UBC <br />�udc. <br />a. ('h;ip�cr 10 specifics Ihat devators thal open into corriJors th�u have a lirc <br />rrsisiivc raling must bc sep:iratcd Gom thc corridor by onc hour f irc rcsisti� c <br />ratcd construction. or Ihc hoist�ray pressuriud. Our clevaior lobbies ure not <br />runnxicd to a"corridor". Gxil corridors arc not rcquired in a sprinklcrcd <br />�,urking Faragc as lanc as an esit is �cithin 2�0 �cct Gom am• poin� on a flour. <br />�, ,� crc rian IOOJ.1.? '?. 'I'he daars to thc csit stairs arc �vcll �vithin ihat limit. <br />h. C'h:iplcr d requires lhal cic•;ators in high risc buildings opcn into onc huur �ire <br />rcsis�ivc ratrd lobbies. or Ihc hoist�rays be pressurized. "I'he Gnr,ige is not a <br />„hich-risc" building. <br />l'hc \1'AC �'�)G ')G rcyuircs that cleca�or hoisne;n•s bc providcd �� i�h cithcr <br />pressurizati.�n or openin�s to Ihe outside to precent the :iccunmlation of smoke in thc <br />hoist�ca} .\Vc do ha�c ccntil;niun grills at thc top of ihc cicvamr hoishem ihat mec�s <br />ihc rcquircmcn� of seclion .i I 1.6, 71 I.I and 71 I.G. <br />Nu�� h�rc rke in ihc codc :u� prcssurizcd hoist�ca� s or stainc:�cs rcyuircd. <br />11I •�'Viu �-�l h5U9 SIHf CL SC�fTIE 1A1 ,91Ja 1� :��u ::? SS��9 f� :Or �_�1 21�1d <br />�✓ <br />