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v <br />N <br />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 />b Upper <br />Y PPe <br />SQ. IN. of <br />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />(See Elev ) <br />required sow <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />needed <br />required <br />needed <br />ventilators <br />Main <br />22.00000 <br />2.000000 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <br />0 <br />606.0 <br />330.0 <br />276.0 <br />(Zone 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-Bl <br />SCALE: Y4'=V-0" <br />I Attic Ventilation I <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 comice vents. <br />**CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN** <br />(Values to be verified with Manufacturer Specifications) <br />• RIDGE VENTS 15 SO. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SO. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SO. 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 />��• �i" <br />RC W IN k <br />•'�N . <br />••'* G0 <br />y,� <br />O N <br />_ ,• O <br />11'rl'r��rft 100 <br />To the best of the Engineers knowledge, information and belief, <br />the structural plans and specifications contained within these <br />drawings comply with the 2017 <br />Florida Building Code - <br />Residential 6th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />a <br />11- <br />Q <br />E co <br />pp <br />s � 8 N N it <br />O <br />m J <br />N <br />N <br />to 1-"i LL LL a <br />N N <br />a <br />a <br />Z���e�,z�o <br />�LLLL <br />Gp0 C! m13 0 <br />:3WrN`_ m�a <br />0 2 rn Q <br />z <br />ILW <br />rna <br />L0 MZ �O� <br />Z <br />N O U ❑❑❑ <br />W <br />z <br />z <br />z <br />a � <br />V) <br />N <br />f7 <br />z a <br />4 <br />LL <br />4 <br />'U <br />0 <br />LLJ <br />w <br />8 <br />Of <br />Qesd <br />N <br />O <br />M <br />M <br />i <br />O <br />J <br />LL <br />CO <br />g E <br />io <br />¢ <br />g <br />O0 <br />2O <br />V <br />�0 <br />a8 <br />oa <br />O <br />Z <br />E <br />N <br />ao <br />E3 <br />rc� <br />L <br />C <br />< O <br />9 <br />m M <br />O <br />irZ <br />Z <br />- C <br />J <br />yo <br />�m <br />m <br />>rZ <br />gZK <br />W <br />m 3 <br />Q <br />U � <br />8° <br />ado <br />-0 <br />a <br />r� <br />N LLLL <br />F <br />J <br />O <br />w 2 <br />yl� <br />zlaT0 <br />a <br />3 <br />T <br />>M <br />3 <br />.� <br />LO <br />CO <br />� <br />C) <br />� <br />M0 <br />N <br />so <br />O <br />O <br />T- <br />� <br />= <br />>% N <br />� � <br />r <br />Lri <br />T <br />Lo <br />USn <br />T <br />N <br />o <br />m <br />T <br />E O <br />iri <br />H <br />Z <br />C <br />C <br />d <br />U J <br />w <br />Q 0 <br />J <br />JOB <br />NO: <br />20-6221 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />