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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 11150 of the area of the vented <br />space. The ventilating area maybe 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 />ATTIC <br />"CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN - <br />to be verified with Manufacturer Specifications) <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 />• 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 />I � <br />I I <br />1 <br />O <br />i <br />d <br />I J <br />� <br />, cN <br />12'-0" RIDGE VENT <br />0 <br />J <br />T <br />I to <br />RIDGE <br />N <br />T <br />LO <br />LU <br />i <br />a <br />O <br />CO i <br />�!! <br />4'-0" ROOF VENT <br />�—, <br />r <br />Z <br />p <br />I :12� SLOPE <br />I I <br />O <br />S O <br />SOP <br />5: <br />o <br />I ZONE-2 <br />5:12 SLOP I <br />Uj <br />I ATTIC SPACE <br />L <br />, <br />�, J <br />i <br />ZONE-1 <br />�. 17 SQ. FT. <br />i <br />ATTIC SPACE <br />I <br />ZONE-3 u <br />i <br />733 SQ. FT. <br />ATTIC SPACE <br />I <br />4'-0" ROOF VENT <br />I <br />I <br />I <br />1552 SQ. FT. I <br />z <br />o I <br />LU <br />I a <br />o <br />I <br />I <br />LLJ <br />W <br />o <br />t\ IL <br />O <br />lJ.l <br />o <br />w <br />i <br />T <br />I <br />I <br />I <br />i <br />I <br />i <br />ROOF <br />PLAN - ELEV-Al- <br />SCALE: %4"=l'-0" <br />ATTIC VENTILATION CALCULATIONS - Al <br />Tr <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. f o <br />of vented <br />IN. of <br />of <br />ventilation <br />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 />ventilatorsCIA <br />Main <br />0 <br />2 <br />Floor <br />733 <br />704 <br />101 <br />352 <br />25 <br />176 <br />276.0 <br />0.0 <br />275.0I <br />(Zone 1) <br />Main <br />0 <br />0 <br />Floor <br />17 <br />16 <br />2 <br />8 <br />1 <br />4 <br />0.0 <br />0.0 <br />(Zone 2) <br />0.0 <br />Upper <br />12 <br />2 <br />Floor <br />1552 <br />1490 <br />213 <br />745 <br />53 <br />372 <br />456.0 <br />(Zone 3) <br />180.0 <br />276.0 <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 />3 <br />J <br />Q <br />r2 <br />rh <br />1.0 <br />O <br />J <br />a) <br />O <br />1 <br />N <br />a <br />00 <br />M <br />V7 <br />r� <br />0 <br />1.0 <br />O <br />O <br />O <br />C/7 <br />O <br />H <br />Q <br />N'J <br />O <br />a <br />H <br />N <br />E <br />0 <br />x <br />0 <br />C <br />C <br />J <br />O <br />v <br />0 <br />J <br />O <br />N <br />N <br />rh <br />0 <br />16 <br />a <br />rrs <br />0 <br />a� <br />0 <br />0 <br />9 <br />0 <br />+ate as <br />0 <br />o <br />r m m <br />0 <br />v <br />d <br />s <br />c � <br />o <br />a v <br />y <br />M <br />N <br />O <br />N <br />a i'i F • li f <br />. <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 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 />W <br />d' E '0 N <br />O M UU c, m d' <br />� <br />y N fA � LL li <br />N tgtir--° k w <br />N 6cNov � w or a <br />Q J <br />