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ATTIC VENTILATION CALCULATIONS - 131 <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. INof <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />. <br />Ventilation <br />Ventilation <br />(See Elev ) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />0.000000 <br />0.000000 <br />Floor <br />35 <br />34 <br />5 <br />17 <br />1 <br />8 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />9 <br />2.000000 <br />Floor <br />1533 <br />1472 <br />210 <br />736 <br />53 <br />368 <br />411.0 <br />135.0 <br />276.0 <br />(Zone 2) <br />**NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 6th ED. RESIDENTIAL. <br />'.ONE-1 <br />ITT I C SPACE <br />15 SQ. FT. <br />ROOF PLAN <br />SCALE: 14"=1'-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 />O WN <br />\v P f <br />..E • '% o <br />. Cid <br />J <br />01 <br />•, <br />•. <br />•••••......^'*•��. <br />t1� Qom: <br />; <br />p e`er <br />r R OFESS�O <br />-' <br />a�~ <br />To the best of the Engineer's 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. Engineer's signature and seal Is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />61 <br />W <br />9 E m Qp <br />O 8 . N N i! <br />CDM J LL <br />M N N CONLL <br />7 LL t�25211 LL LL d G. <br />a <br />y M <br />N T ii S 477' Lu W O <br />'f. <br />o O <br />C <br />Wl0 <br />f d' co0 <br />mo�CO mi°�� <br />W <br />Z <br />(nEZ,0 -joao <br />�BNao5' <br />N ¢Mz <br />z <br />L) ❑❑❑❑ <br />W <br />cq <br />Z N <br />Z <br />R <br />J f+I <br />� th <br />V) <br />z <br />. <br />u_ <br />�� <br />,V <br />w n <br />jL <br />O <br />L/) <br />c <br />N <br />E <br />' <br />o <br />U 00 <br />w <br />r— m E <br />O <br />= <br />o <br />t <br />u' <br />Q cm <br />14 <br />�w <br />M <br />o <br />Z O <br />s <br />N <br />Q <br />C <br />ce C <br />cL 0 <br />-' <br />2 0 <br />oa <br />E <br />'T 'd <br />_C <br />O <br />a'z <br />XOwu <br />VUo <br />a <br />OOU <br />¢ <br />Z <br />C <br />N <br />�o <br />w <br />• nJ <br />o <br />U <br />NO <br />o� o <br />gLL <br />YZ <br />Z <br />U) J <br />7b <br />r <br />y <br />O <br />N <br />T) <br />82 <br />o= <br />W <br />�3 <br />JoJ= <br />< <br />0x <br />a2 <br />�t <br />uw <br />A <br />Ntz <br />3 <br />J <br />�N <br />>Lo <br />a; <br />� <br />W, <br />.= <br />T <br />> <br />CV) <br />.-. <br />Cco <br />Cfl <br />m <br />aLO <br />d' <br />� <br />N <br />= T <br />T 04 <br />r <br />ui <br />y <br />M <br />c) (V <br />c <br />z <br />M <br />z <br />E O <br />a <br />o <br />U _j <br />¢ o <br />°i <br />JOB <br />NO: <br />20-0566 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5.0 <br />