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._.__ . , <br /> ,:- <br /> Uct 10 O1 04: 29p <br /> • � � p. l <br /> fPost-N"Fex Mote 7g7� oatc rd <br /> E��aNCE 9.,o.a� ��K. z <br /> ,oF u F� I <br /> Pw�, �E c 1. <br /> fIREPROTE f10N �� R �� ��E. <br /> rhau. <br /> N'l'!N(�L`�i.illtYllfC.COri1 • F8�� Fn�M <br /> �Ifl I2(r�i�fNt()/�� <br /> Cily of Fvere�t — <br /> duildiug Dep;�nmcnl nc�obcr IU, 7001 --- - <br /> Attn: Tony <br /> RE: Lverett �urgical Cenlr�i - Insul�uion <br /> Iony: <br /> 1 his IcUer i� p�r���ur roquest to explain why �lie insula�ion ;�� thr a6ove projert is bcing <br /> mov��cl. <br /> 1 he rxisting insula�inn is located at thc bot�om cord of the wo�d �russ cuns�rucli0n at thc <br /> third flooc bVe arc reques�ing th;{t tl�c insulation be moved up to Ihe undenide o(the roof <br /> deck or top cord a(the Uuss. The reasons for this requast are: <br /> • �'VIIh (I1P II15lII��1011 �l Illn���tlont cord and a suspended ceiling below the sprinkler <br /> syslem would requirc three Icvels of fire proicction duc to rc�mbustible <br /> constructfon, pne level a� die roof der.k, one levcil l�etween the bottom of truss, <br /> and the drup ceiling, �nd one lawyer lo cover the fbor arca. 4Vhile N.(.P.A does <br /> not require thc liydraulics ro flow thc hc;�ds abovc and below ihe ceiling, i� dues <br /> requirc the hvo Icvels of heads abovc thr.ceilinK to flow at the same iima lhis <br /> requiremen�p�its to much demand on the sprinkler systrm. In affect we would <br /> c,ilculate 4,00t�sq. fi, in place of ihe 2,ODU requireYl. <br /> • The insulation coidd fall on the lo"•er hrads and !�Inck their spray pattem if the <br /> heads ��avc wenl oH. <br /> • The exis�ing louition of Uic insul�uiori �p,i�;cs thc attic space a cold area rcyuiring a <br /> ��Y WP�sprinkler system. I he alfecl causes a couple o(problenu: <br /> r, fhe dry uprigh� he;ids are nol made or listed long enough to cnver the coid <br /> attic. <br /> � n��)' �)'I��'system in [he attic requims a greater percentage o(liydraulic�s <br /> (30°'� inrrrasrl and also d�anges thc"C" L�clor(rom .IZO to 10(1. Tliia puis <br /> a higher demand on the system, which makes thc piping irnpos;iMe tn meet <br /> drain,i�;i•codes. <br /> Please kecp in mind 16e follo�ving� <br /> • 1Ne only have a limiled supply of water and piessure lo�vork �vilh. <br /> • This arca ��-ill loou.i�c>ut 20 P.5.1 in static head (or elevation. <br /> • ihe sprinklrr nwst bc abl�to meet (lo�v in pnc muw,��r Icss. <br /> • b1'ith the piping geuin�; larger can tliis system rneet the GO-second code. <br /> • bVith a dry syslem�ve could have�aater in die tnpped seclions of ihe lines and <br /> mains, 1VI11CI7 N'pUld I11111IC((I1C SYSICIII IOf Ifl�111110. <br /> • nrainage (or a dry syylent per C<�de would be.dmost impos�il�lc Io a[complish <br /> 170G ;firF�orll1��v��Suulh. Spd(Uc41�A y(1174 . ;> >. `li' <br /> Ofi)GH. 6C,36. loll Fm�: !•8:�-(;?n-'q�7. 1 ax: pOG/ GS!-h744 <br />