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! ! I I. I , . 1 j7 t nri .. 11 wtr t. <br />h7t <br />3 <br />m <br />0 <br />r7 <br />v <br />r7 <br />0 <br />M <br />.cpV- <br />J <br />c� <br />m <br />L0 <br />A <br />L0 <br />L <br />R <br />0 <br />L0 <br />L <br />0 <br />dr <br />H <br />Q <br />O <br />E <br />1.-0y <br />N <br />E <br />EZ <br />12 <br />v <br />C� <br />CT <br />0 <br />M <br />LO <br />a <br />3 <br />rn <br />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. IN. of <br />SO. 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 />0 <br />0 <br />Floor <br />30 <br />29 <br />4 <br />14 <br />1 <br />7 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />16 <br />2 <br />Floor <br />1820 <br />1747 <br />250 <br />874 <br />62 <br />437 <br />516.0 <br />240.0 <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 FLORIDA BUILDING CODE 7TH EDITION (2020) RESIDENTIAL. <br />-1 <br />SPACE <br />. FT. <br />ROOF PLAN — ELEV—B1 <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 comice vents. <br />"CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN" <br />(Values to be verified with Manufacturer Specifications) <br />• OFF -RIDGE VENTS 138 SO, IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. 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 -Air Needed) <br />N <br />N <br />o <br />> "' <br />C <br />o � <br />0 <br />ci a o <br />CD <br />C Nco N <br />-es m <br />x <br />N C 6L- a <br />�o o <br />4 � C4 <br />3 d <br />N7 G im <br />E <br />�O o <br />a u <br />• -;3 <br />1 <br />o the best of the Engineers knowledge, information and belief, <br />the structural plans and specifications contained within these <br />drawings comply with the 2020 Florida Building Code - <br />Residential 7th Edition. 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