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1'-0" <br />ATTIC VENTILATION CALCULATIONS - B1 <br />ATTIC VENTILATION <br />REQUIRED <br />UPPER VENTILATION <br />PROVIDED <br />Off -Ridge <br />1/150 Rule <br />1/300 Rule <br />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 />SO. FT. <br />SQ. IN. of <br />by Upper <br />SO. IN. of <br />of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />required soffit <br />ventilation <br />vented <br />soffit <br />be provided <br />by upper <br />Ventilation <br />Ventilation <br />(See SElev) <br />needed <br />required <br />needed <br />ventilators <br />Main <br />0.000000 <br />0.000000 <br />Floor <br />35 <br />34 <br />5 <br />17 <br />1 <br />8 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />9 <br />2.000000 <br />Floor <br />1533 <br />1472 <br />210 <br />736 <br />53 <br />368 <br />411.0 <br />135.0 <br />--._ <br />276.0 <br />(Zone 2) <br />'*NOTE*' <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 6th ED. RESIDENTIAL. <br />'-ONE-1 <br />ATTIC SPACE <br />15 SQ. FT. <br />ROOF PLAN <br />SCALE: Y4'=l'-0" <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 6th Edition <br />(2017) 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 />• RIDGE VENTS 15 SO. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SQ. FT. <br />`� P •".- N S <br />•. <br />H <br />'� ••' F L <br />•NP <br />r71 rl�lllli!llttlllt����` <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 2017 Florida Building Code - <br />Residential 6th 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 />w <br />(� <br />p8p� <br />N C <br />N <br />N U. <br />ao <br />LL 4 <br />�i <br />N <br />yMM <br />N LL U. <br />LL <br />u- <br />W N <br />a <br />7S <br />"11 <br />J <br />m S 0 <br />W <br />M N <br />J <br />D_ <br />IL <br />IL 0 <br />2c <br />N Cl) <br />dU <br />o SQ <br />0 <br />Z <br />❑❑❑ <br />W <br />z� <br />Q <br />d NNN <br />V) <br />- f+1 <br />z <br />■ <br />0 <br />V) <br />W <br />c <br />U as <br />Q <br />� Q <br />N <br />se <br />M <br />J <br />E 8 <br />8 <br />S <br />2Q <br />H• 6 <br />N CY <br />C <br />gfx <br />z <br />I <br />z <br />gIW <br />W <br />S <br />U <br />g <br />w <br />° <br />8.5 <br />Sx <br />N <br />Lo <br />L <br />� <br />� <br />^1 <br />W <br />ro <br />c� <br />.> <br />0) <br />�—. <br />�o <br />x <br />> <br />I— <br />m <br />= <br />(0 <br />0 <br />7- <br />j 04 <br />E <br />m <br />T <br />N r <br />H <br />o <br />z <br />Z <br />c <br />E <br />E <br />a; <br />m <br />c <br />c <br />n� <br />U <br />Q p <br />3 <br />JOB <br />NO: <br />20-6578 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5.0 <br />