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INDIAN RIVER COUNTY ADMINISTRATION COMPLEX <br /> TLC PROJECT NUMBER 503036 <br /> MAY 18 : 2006 <br /> ATRIUM SMOKE CONTROL <br /> PAGE 4OF6 <br /> ENGINEERING <br /> FOR ARCHITECTURE <br /> BUILDING 2 <br /> ATRIUM SMOKE EVACUATION <br /> ( BASIS NFPA 92B - 2000 EDITION , 2001 FBC) <br /> FBC-2001 Mechanical Code Section 403 . 6 . 6 <br /> 4U" Avdam ii amoa catvars " be <br /> �tiatke'wtia,a .' d'skrsg <br /> mmatuH�a.z....a etats9g gf6a tanoadRra <br /> a *if iif:+w ill waft Ream A0 Cd'.at..vWwd <br /> da��aa,4cu k <br /> as m is mnr tri ia� qr*m <br /> trt SS606.80 "kaI <br /> aromm"0404 01)orW auFaka <br /> *YWA sma U toaaud at Gro 4EI tt tta <br /> &I OMM aWtt VAWW 40,= afm <br /> sima to ftxa+t k a mkkaImofAw sk dowa fmr <br /> saVI * bUb way beI&Ixt#A) w . <br /> att kw of tta to &a to <br /> . ?346Oran <br /> 403k3.3 of a of <br /> iha provk1a13a4rA3mi�ltya�kts <br /> wbeat9eta�yatottkt. x5ktii:8 <br /> as sysxMSW ka PWMW m ft*6'04 is <br /> 40i. AI; >wmom* wMy * to iMI <br /> Lcm Sa° par ar IDa ob*= &d *0 6a <br /> yat dsa . . aahasnYka <br /> tpat� a�pifakNi dr75% a{tlae <br /> 03 *5 bumust emuch dwi ka pa ceded for aka <br /> am= she . 'W-1m*a cRtaat <br /> aysk tiaR 4*sO1kmhVrA&dby#4I <br /> kA WhawkA In 490W&Mt 44 th asWAA <br /> to"I desk sto be rOVkW sa dw4ibw 40M fm <br /> vi:W in a toatIda - b3' dm . . <br /> METHODOLOGY <br /> In accordance with 403 .6 .6 . 1 , the system exhausts 40 ,000 cfm of air from fan EF-2-2-3 <br /> (20 ,000 cfm) and EF-2-2-4 (20 ,000 cfm) . The atrium is under 600 ,000 cubic feet and <br /> has a height of less than 55 feet. In accordance with 403 .6 .6 .2 , 75 percent of makeup <br /> air (30,000 cfm) is introduced at the lowest level by opening doors 101A, 101B , and <br /> 101 C. Each door group is one pair of TxT doors. The combined area of these doors is <br /> 126 square feet, and each is on an electric operator. The velocity through the opened <br /> doors is 238 feet per minute . Air migrates to a plenum at the roof level in the cove <br /> ceiling . The plenum extends approximately 84 feet around the ceiling and is <br /> approximately 1 foot deep for a total of 84 square feet of opening into the fan section . In <br /> accordance with 403 .6 .6 . 5 , the system has manual control in addition to automatic <br /> control . The manual control station is located in the fire alarm control panel at the <br /> building entrance . <br /> RECEIVED <br /> MAYyig epr1 � 2[005 <br />