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IF <br />19 <br />ATTIC VENTILATION CALCULATIONS - 131 TRB <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />ATTIC <br />1/150 Rule <br />1/300 Rule <br />SPACE <br />(No Upper <br />(Must Provide Upper <br />Ridge <br />Vent Amt <br />Off -Ridge <br />Ventilators Req.) <br />Ventilators) <br />(Ft.) <br />Amt. <br />SQ. IN. SQ. FT. <br />Total <br />Ventilation <br />Total SO. <br />SQ. <br />SQ. IN. of <br />SQ. IN. <br />SQ. IN. of <br />Of of <br />IN. of <br />FT. of <br />ventilation <br />of <br />Ventilation <br />Provided <br />ventilatio vented <br />ventilatio <br />vented <br />to be <br />Ventilatio <br />by upper <br />n soffit <br />n required <br />soffit <br />provided by <br />n <br />Ventilators <br />required needed <br />neede <br />upper <br />(see Elev) <br />d <br />ventilators <br />Main <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <br />22 <br />2 <br />606.0 <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-B1 <br />SCALE: %4'=1'-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 c <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 / SQ. FT. <br />*If not enough vented soffit 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 />WN <br />' Ns t • •. '.: <br />6 <br />•,�• ••4 <br />%, ••,, FLO <br />F E S 51 W` <br />�ttlli4l! <br />To the best of the Engineer's knowledge, InWmatlon and beNef, <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 />Q <br />oo <br />E <br />N 6 C) J i1 <br />Loa <br />0 at u W <br />, <br />t,- <br />d) 0rN•u0� LL °' he <br />LLJ y <br />coLL W <br />1 v S <br />Z L Xs0, <br />A 0~ W <br />O: 4 c.4 W O <br />a <br />7• <br />L CLa <br />N MZ ENO <br />V U_j 0 <br />Zp <br />W ❑�❑ <br />2 <br />Z N �n <br />� h <br />tv <br />Co <br />u. <br />cn <br />(� ua <br />•O � <br />g <br />w $ <br />N C N <br />t� I- u) <br />U � <br />$ <br />_ <br />c <br />Q a <br />— • <br />M <br />w <br />= <br />M <br />� <br />E 0 <br />Za <br />22 <br />zo <br />wo <br />� <br />z <br />a <br />o <br />f0 <br />9 u <br />WLLzQ <br />z <br />z= <br />oa <br />so <br />zou <br />_ <br />N <br />�� <br />p <br />oz <br />Z <br />ro <br />c <br />- <br />H� <br />o <br />gLL <br />Z <br /><w <br />U <br />�o <br />W <br />Mill!O <br />�,u.,� <br />i1a <br />x <br />o 3 <br />m� <br />J <br />L <br />W <br />W <br />0 <br />.> c <br />00 <br />r1/ f J <br />M <br />LL <br />i� <br />T <br />o <br />0) <br />V) <br />.T� = N <br />r <br />r <br />i 00 n N <br />T <br />CO <br />r <br />E <br />M <br />N y <br />z <br />Z <br />E CD <br />E <br />a <br />U 0 ¢ p <br />JOB <br />NO: 20-8089 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />