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ATTIC VENTILATION CALCULATIONS - B1 (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 of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQINof <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />. . <br />Ventilation <br />(See Elev) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />22 <br />2 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <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 FLORIDA BUILDING CODE 7TH EDITION (2020) RESIDENTIAL. <br />ROOF PLAN - ELEV-Bl_ <br />SCALE: %4"=1'-0" <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 7th Edition <br />(2020) 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 />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SQ. FT. <br />• STUCCO SOFFIT VENTS - 126 SQ, IN. OF NET FREE AREA / SQ. FT. <br />*If not enough vented soffit is provided due to fire protection, the contractor shall use the <br />following approved vents: <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. <br />**Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft. of Deck-Alr Needed) <br />N <br />O <br />N <br />E�� P c) <br />AA <br />i <br />A <br />a <br />vo <br />� <br />• <br />LU n <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 2020 <br />Florida Building Code - <br />Residential 7th 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 />0 <br />W <br />E <br />O co 8 <br />oo <br />coo <br />N r- it <br />LL <br />., <br />a) _ <br />� <br />Q <br />ENO <br />LL d <br />N <br />* <br />mLLL- <br />—r <br />a w <br />OO! <br />y� <br />�° <br />Zz <br />S <br />�° <br />L (6 <br />co <br />W O <br />W05 <br />91 <br />¢ ¢ <br />Z <br />IL <br />N M <br />OIL <br />(n O <br />aOU <br />Q <br />U� vv) <br />V M � <br />z N th <br />O 00 <br />0 N <br />z � � <br />Q � <br />J <br />n <br />E3 <br />N <br />N <br />M <br />z a <br />VJ <br />o <br />W g <br />� co <br />0^ <br />L ! <br />W o <br />Ly N <br />F— UJ <br />U <br />L1' <br />ie t. <br />� <br />r— — EEp <br />I <br />0 <br />�_♦ <br />V O N <br />Q N <br />�� <br />am A <br />O <br />w <br />M <br />zo <br />z <br />g <br />ill <br />J <br />L.L. <br />QC <br />C <br />E 0 <br />zo <br />o O <br />Z o <br />< N <br />2Q <br />O a <br />¢O <br />Wo <br />u O <br />z <br />� � <br />— O E <br />XCOi <br />OG <br />¢z <br />OK <br />az <br />N <br />o <br />o <br />N i <br />ao <br />m¢< <br />� <br />O <br />co <br />m <br />Q W <br />< <br />fn <br />Zn <br />N <br />Q <br />O¢ <br />Z Z <br />O <br />�O <br />Q ' <br />j> <br />� <br />a <br />�w <br />U <br /><o <br />a <br />x� <br />li <br />r 3 <br />OW <br />Conj <br />v <br />oa <br />> T <br />d r <br />°3 <br />0O <br />O <br />= <br />` <br />J <br />a; <br />Cq <br />U <br />O <br />Q <br />Q <br />o <br />C m <br />o <br />1� <br />\� <br />/CL <br />T <br />ECN <br />�• <br />r <br />(d p <br />C3� <br />LC) <br />= N <br />r <br />U <br />CD o <br />r= <br />N <br />05 N <br />r <br />O <br />E <br />c N <br />M <br />Z <br />Z <br />E O <br />CU <br />E <br />o <br />Q <br />d <br />U <br />Q p <br />JOB <br />NO: <br />21-2025 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />