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�l <br />J <br />N <br />O <br />ATTIC VENTILATION CALCULATIONS - 131 (TRH_ <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />(No Upper Ventilators <br />1/300 Rulepp <br />Ridge <br />Vent Amt <br />Off -Ridge <br />Req.) <br />(Must Provide Upper Ventilators) <br />(Ft) <br />Amt. <br />Total <br />Ventilation <br />ATTIC <br />Provided <br />SPACE <br />SQ. FT. <br />Total SQ. <br />SQ. FT. <br />SO. IN. of <br />by Upper <br />SQ. IN. of <br />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />. <br />SQIN. of <br />SQ. IN. of <br />Ventilators <br />(See Elev ) <br />required soffit <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />__..._ <br />needed <br />required <br />needed <br />ventilators <br />Main _ <br />.._._. <br />22.00000 <br />2.000000 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />460 <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—Bal <br />SCALE: %4'=l'-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 SO, 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 / 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 />�RW, N y <br />.. •.. <br />`. <br />U. <br />�\�,, <br />o <br />Or Ess��� <br />�$ <br />�,'7rrllf t l t I l 00 <br />To the best of the Engineer's knowledge, Information and belief, <br />the structural plans and spedfications contained within these <br />drawings comply with the 2017 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 />W <br />F-$ <br />�" <br />S N 4 <br />Lo 0 <br />N J <br />w ^ # 5 <br />tl! <br />Q <br />fQn�1---a <br />` J M ,x�C• � rA <br />LL LL S <br />= <br />0 0 <br />rr 0o <br />O <br />J <br />J(Qe� � <br />z <br />ILW <br />� M � <br />°" <br />z <br />❑O❑ <br />W <br />z <br />z <br />a <br />(nLn <br />Q) <br />z <br />C <br />C1 <br />t'13 <br />w <br />� <br />V <br />O <br />c <br />�N <br />U � <br />_ <br />:I <br />Q <br />0 <br />so <br />� <br />M <br />w� <br />WZZ <br />oLL <br />4 <br />ZY <br />QE <br />E <br />z$ <br />if <br />m� <br />J <br />a <br />SY <br />N� <br />o <br />ZW <br />�w <br />W <br />� <br />T <br />w <br />U <br />aZ <br />N W <br />2 <br />H� <br />o <br />}¢Q <br />ZI� <br />V <br />0 <br />> ce) <br />L <br />M <br />> <br />cD <br />'> <br />U <br />M <br />Q <br />C <br />' <br />0 <br />O <br />CL <br />I—oc <br />m <br />C7 <br />CO <br />\� <br />E <br />T <br />• <br />_ <br />Qi <br />r <br />T <br />I M <br />� <br />P o <br />LO <br />r <br />W <br />E <br />O <br />c T <br />M <br />Z <br />Z <br />a <br />E <br />E O <br />v <br />< <br />o <br />JOB <br />NO: <br />20-8074 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />