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ATTIC VENTILATION CALCULATIONS - 131 (TRB) <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1l300 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 />soffit <br />ventilation <br />vented <br />be provided <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 />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 />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 V300 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 />.w� <br />�•�v y}�J� <br />{� <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 <br />6th Edition. Engineer's signature and seal is only for <br />the structural engineering portions <br />of the drawing pages bearing <br />Engineer's signature and seat. <br />... <br />s} <br />Q <br />E co tOp- <br />O pU N # <br />N N m ILL <br />w10 <br />ix <br />JILL <br />I IZ <br />w <br />a <br />Z <br />Qj MN M <br />W N <br />mrJi i� a a <br />J Z 0 <br />t @ m O <br />x <br />W <br />y_ <br />O O r-r- m Q <br />4 <br />Z <br />LL <br />co co N Z W O <br />co U Or <br />Z <br />N J <br />Q <br />o I <br />(D M <br />� N Q <br />Z <br />< <br />— <br />waft <br />-J <br />a N <br />v) <br />N <br />c7 <br />''Z^^ D <br />—1 <br />V - <br />4-1 <br />W @ <br />0 � <br />O <br />O <br />Nr ^ <br />W <br />y <br />U N <br />LU J <br />i— — E <br />I <br />v o � <br />• <br />Q N <br />sm <br />o <br />w <br />Mi <br />C7 <br />o <br />ZZZ <br />Q <br />� <br />W <br />E <br />Q <br />O <br />wZ <br />z <br />N <br />Q N <br />oa <br />U <br />'o <br />w c <br />~ <br />_ <br />O <br />o¢ <br />aF <br />so <br />o� <br />N F <br />z <br />�o <br />w <br />az <br />� <br />yam- L <br />(o <br />on i <br />¢a <br />U <br />m0 <br />m0 <br />O <br />O <br />Z <br />ZN <br />Qw <br />z <br />Q <br />01 <br />Z <br />U <br />ao <br />aLL <br />Z <br />= f- <br />A <br />O <br />Li <br />�o <br />O <br />V <br />0I< <br />a <br />o <br />C <br />o <br />T <br />y <br />N <br />�M <br />N <br />f0 <br />`J <br />(0 <br />cc <br />N <br />O <br />< <br />C�11 <br />F_ <br />W m <br />'� <br />o <br />r <br />co oN <br />O <br />LO <br />N <br />r <br />1/1 <br />T <br />I CU <br />T <br />r r <br />Lo <br />r <br />N <br />N <br />M <br />r <br />ZM <br />Z <br />E O <br />n. <br />E <br />U 0 <br />JOB <br />NO: <br />20-8077 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />