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ATTIC VENTILATION CALCULATIONS - B1 (TRB <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />(No Upper Ventilators <br />1/300 Rule <br />Ridge <br />Vent Amt <br />Off -Ridge <br />Req.) <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />Amt. <br />_ <br />- - <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 />of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQINof <br />Ventilators <br />ventilation <br />required soffit <br />ventilation <br />vented <br />soffit <br />be provided <br />by upper <br />Ventilation <br />. . <br />Ventilation <br />(See Elev) <br />needed <br />required <br />needed <br />ventilators <br />22 <br />2 <br />Main <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <br />606.0 <br />_.__.__ <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: Y4"=V-0" <br />I Attic Ventilation I <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 SO. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT. <br />• STUCCO SOFFIT VENTS - 126 SO. 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) 19 = Linear Ft. of Deck -Air Needed) <br />Y. <br />cad <br />U <br />�`�� <br />� k <br />f��f4filftt(IlZtt� . <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. 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 />n <br />M 7k <br />pOp pp <br />cb <br />N y a J LL <br />� S ik LL W <br />di <br />y t` rZ04 LL W O. <br />y M IT I N Sle <br />J 11, <br />LL LL d W S <br />I� <br />0V <br />Z <br />0 <br />t 0 <br />W <br />Nko �O <br />Z <br />LL <br />a <br />N MZ so O <br />V y <br />_ <br />W <br />❑�❑ <br />CD V <br />z � .- <br />z <br />z <br />�a. <br />Nij <br />z <br />w <br />Ow <br />Ln <br />Lu <br />C) <br />c <br />• <br />ch <br />E <br />ego <br />e <br />_E8� <br />� <br />R�U <br />Zg <br />ro <br />t <br />� <br />_ c <br />Y <br />IN <br />gLL <br />z <br />._I <br />Wes_ <br />g� <br />W <br />O <br />�w� <br />CID <br />o 3 <br />C <br />CO <br />L <br />� <br />o <br />> <br />U <br />r� <br />> <br />0 <br />m <br />� <br />O <br />T <br />co p <br />r <br />Ln <br />= 04 <br />r <br />.T� <br />E <br />1-M <br />d <br />z <br />r <br />E C) <br />D <br />z <br />a <br />0 S <br />a; <br />¢ p <br />-1 <br />JOB <br />NO: <br />21-1070 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />