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ATTIC VENTILATION CALCULATIONS Al (TRH <br />ATTIC VENTILATION REQUIRED I UPPER VENTILATION PROVIDED <br />1/150 Rule Ridge <br />1/300 Rule Off -Ridge <br />(No Upper Ventilators (Must Provide Upper Ventilators) Vent Amt Amt. <br />Req.) (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. ofSQ. <br />of <br />o <br />ventilationt <br />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 />( ) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main 29,00000 1,000000 <br />Floor 2373 2278 325 1139 81 570 0 573.0 <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 FBC 6th ED. RESIDENTIAL. <br />ROOF PLAN - ELEV-Al <br />SCALE: 14 "=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 < <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 / SO. FT. <br />• STUCCO SOFFIT VENTS - 126 SQ. IN. OF NET FREE AREA / SO. FT. <br />V not enough vented soffd is provided due to fire protection, the contractor shall use th <br />following approved vents: <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SO. 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 />O <br />[i <br />J <br />cog <br />c _3 <br />�ot1Z1lEtffFPf�tt <br />,,`�,• <br />.. <br />SRO WIVci <br />—j F � <br />" <br />_ U <br />�" � <br />I?- 11A <br />se F <br />E 5 S ti Ot, <br />t� <br />n`�ittttttft''Et`,� <br />To the beat 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 />Engineers signature and seal. <br />0) <br />8 <br />� <br />o <br />O Oj Grp 9k <br />aN� ,C14i, <br />LL W <br />dJ <br />j op iR <br />Vi r- r+ —r ku n <br />ajM00 LL. d Y <br />JMCM L L LL iL <br />V <br />_ <br />�O <br />�m 0�0(7 <br />W <br />Z <br />LLW <br />CD <br />N a 3 <br />imrn <br />a <br />0 <br />Z <br />N M z W <br />OU U-1 uvi <br />❑ ❑ ❑ <br />r <br />z <br />z <br />z � <br />J <br />d N <br />[^' ' <br />W <br />'' nn <br />V <br />.O <br />W <br />Q <br />V <br />~ EQ <br />2 � <br />x <br />U <br />• <br />N W <br />ti <br />g <br />CO <br />J__j <br />E14 <br />$to <br />FcV V <br />R` <br />Do <br />zE <br />Q <br />z <br />L <br />C <br />WWb <br />4000= <br />< Y <br />�3 <br />g <br />z <br />+J C <br />� J <br />mQ <br />cwaa <br />YZ <br />9N <br />lo <br />WU <br />gg <br />nj <br />W <br />$ICI <br />1 O <br />Ln <br />LL <br />120 <br />n� <br />W <br />t>s <br />C9 <br />.> <br />c <br />N <br />`° <br />J <br />N <br />^C^,, 0 <br />U <br />CO <br />� N <br />2 N <br />O <br />= C,4 <br />NLO <br />N <br />E <br />O <br />M <br />H <br />o <br />Z <br />Z <br />E <br />E <br />ai <br />a� <br />0 _j <br />JOB <br />NO: <br />20-8087 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />