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rn <br />Of <br />rn <br />Of <br />c <br />v <br />'s <br />rn <br />0 <br />0 <br />J <br />N <br />tL0 <br />I <br />cG <br />O <br />J <br />N <br />tr° <br />I <br />i <br />0 <br />3 <br />C.) <br />Q <br />O <br />d <br />N <br />E <br />O <br />O <br />C <br />C <br />J <br />h <br />GJ <br />r7 <br />O <br />V <br />O <br />C <br />O <br />UI <br />U <br />N <br />�O <br />a <br />0 <br />U <br />J <br />tz <br />N <br />N <br />0 <br />0 <br />0 <br />a <br />cV <br />0 <br />LO <br />_o <br />Q <br />m <br />0 <br />ATTIC VENTILATION CALCULATIONS <br />- Al (TRA) <br />Attic Ventilation <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <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 />1/150 Rule <br />1/300 Rule <br />Ridge <br />Off -Ridge <br />j <br />space. The ventilating area may be reduced to 1/300 provided that at least 40% <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />Vent Amt <br />Amt. <br />but no more than 50% of the required ventilation is provided in the upper portion of <br />Req.) <br />(Ft.) <br />the space to be ventilated. Upper ventilators shall be located no more than 3 feet <br />Total <br />(measured vertically) below the ridge or highest point of the space, with the <br />Ventilation <br />balance of the required ventilation provided by eave or cornice vents. <br />ATTIC <br />SQ. FT. SQ. IN. of <br />Provided <br />by Upper <br />-CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN'" <br />SPACE <br />SQ. IN. of SQ. FT. <br />Total SQ. <br />of ventilation to <br />I <br />Ventilators <br />(Values to be verified with Manufacturer Specifications) <br />of vented <br />' IN. of <br />. <br />SQ. INof <br />SQ. IN. of <br />. OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />ventilation soffit <br />ventilation <br />vented be provided <br />Ventilation <br />Ventilation <br />(See Elev) <br />. SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT, <br />required <br />needed <br />required <br />soffit I by upper <br />• STUCCO SOFFIT VENTS - 126 SQ. IN. OF NET FREE AREA / SQ. FT. <br />needed ventilators <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 />Main 29 1 <br />Floor 2373 2278 325 1139 81 570 <br />(Zone 1) 435.0 138.0 <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 />573.0 <br />ROOF PLAN - ELEV-Al <br />SCALE: %4"=l'-0" <br />W/V <br />��,•, <br />ram. <br />Pr.,. <br />45 <br />Q O� <br />•4,, <br />FL.CO) <br />To 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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