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ATTIC VENTILATION CALCULATIONS - 131 (TRB) <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1/300 Rule <br />Ridge <br />Off -Ridge <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />Vent Amt <br />Amt. <br />Req.) <br />(Ft.) <br />Total <br />Ventilation <br />ATTIC <br />Provided <br />SPACE <br />SQ. FT. <br />Total SQ. <br />SQ. FT. <br />SQ. IN. of <br />by Upper <br />SQ. IN, of <br />of vented <br />IN, of <br />of <br />ventilation to <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />required soffit <br />ventilation <br />vented <br />soffit <br />be provided <br />by upper <br />Ventilation <br />Ventilation <br />(See Elev) <br />needed <br />required <br />needed <br />ventilators <br />Main <br />22.00000 <br />2.000000 <br />Floor <br />2000 <br />1920 <br />274 <br />960 <br />69 <br />480 <br />0 <br />606.0 <br />330.0 <br />276.0 <br />(Zone 1) <br />1 <br />**NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 6th ED. RESIDENTIAL. <br />ROOF PLAN - ELEV-B1 <br />SCALE: %4"=V-0" <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 6th Edition <br />(2017) Residential R806. <br />The Minimum net free ventilating area shall be 1/150 of the area of the vented <br />space. The ventilating area may be reduced to 1/300 provided that at least 40% <br />but no more than 50% of the required ventilation is provided in the upper portion of <br />the space to be ventilated. Upper ventilators shall be located no more than 3 feet <br />(measured vertically) below the ridge or highest point of the space, with the <br />balance of the required ventilation provided by eave or cornice vents. <br />-CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN* <br />(Values to be verified with Manufacturer Specifications) <br />• RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT. <br />Coastal Flashings <br />All flashing material for coastal locations (ex: within 3,000 feet of the <br />ocean) shall be corrosion resistant material (ex: zinc and/or stainless <br />steel) and shall be selected for compatibility with adjacent wood <br />preservatives per the manufacturer's recommendations. <br />k1 <br />• <br />V <br />w\ <br />w� <br />1,0 <br />y <br />a <br />aQ <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained <br />within these <br />drawings comply with the 2017 <br />Florida Building Code - <br />Residential 6th Edition. Engineer's signature and <br />seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />0`) <br />r <br />Q <br />co N - o�p <br />N iL <br />O <br />Q <br />O O p� <br />M N n a)C <br />M Ul <br />�p <br />Lo LL <br />N <br />LL N <br />U. J (LJ <br />LL <br />Za(Co, <br />6r0 <br />� 0' iL: <br />rn <br />Lu vi <br />°- <br />a <br />" <br />O <br />�uro <br />x <br />X00 <br />m <br />0° m <br />W <br />ro o�c_o <br />� E91w <br />_J <br />* <br />CN r Q M Z <br />V O A <br />Z <br />O U <br />❑❑❑ <br />W <br />m <br />N O <br />_ � O <br />aNa <br />� Q <br />V <br />— <br />�t O <br />d N <br />M <br />2 <br />� <br />l <br />T <br />Ch Y <br />r.aa n <br />0 <br />r� Q <br />OL9J <br />'V'^) <br />v ' <br />20 <br />E <br />Of o <br />N <br />tames <br />T! <br />� V <br />o <br />� m <br />L.l.d <br />O <br />S <br />z <br />£ v <br />m <br />rn o <br />® a <br />� m <br />Ak <br />m <br />w <br />M <br />Cl) <br />z <br />p <br />ZZZ <br />J <br />t1 <br />Q E <br />u c <br />zo <br />wo <br />Z <br />>N <br />z® <br />o a <br />ca <br />_ C <br />O C <br />o <br />a F <br />z <br />? p <br />OQ <br />az <br />N <br />It <br />L <br />¢o <br />wo <br />¢o <br />wZ <br />�wi <br />m0 <br />� <br />z <br />U <br />O <br />O <br />Z , <br />Q W <br />z <br />Q <br />0 ¢ <br />LL <br />Z O <br />U <br />d <br />�w <br />CD <br />CD <br />oLL <br />w'h <br />=3 <br />r� <br />O <br />r7' <br />a ¢ <br />a <br />pU s� <br />CO <br />> Iy <br />L <br />� <br />W <br />c� <br />T <br />� <br />L <br />O <br />� <br />m <br />cc <br />O <br />N <br />T.. <br />O O <br />Lo <br />�'^ <br />T N <br />T <br />a <br />� LO <br />O r <br />CM <br />o <br />E <br />Z <br />c T <br />E <br />w <br />2 <br />Z <br />c <br />a <br />E .. <br />U .°r <br />Q p <br />� <br />JOB <br />NO: <br />20-2741 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />