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ATTIC VENTILATION CALCULATIONS - 131 (TRB <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 />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 />SQ. IN. of <br />Ventilators <br />ventilation <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Ventilation <br />(See Elev) <br />required needed <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />22.00000 <br />2.000000 <br />Floor <br />2000 <br />1920 <br />274 <br />960 <br />69 <br />480 <br />0 <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 FBC 6th ED. RESIDENTIAL. <br />ROOF PLAN - ELEV-B1 <br />SCALE: %4'=1 r-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 SQ. IN. OF NET FREE AREA / LINEAR FT. <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 />Coastal Flashings <br />All flashing material for coastal locations (ex: within 3,000 feet of the <br />ocean) shall be corrosion resistant material (ex: zinc and/or stainless <br />steel) and shall be selected for compatibility with adjacent wood <br />preservatives per the manufacturer's recommendations. <br />o`�O�N <br />•r <br />J <br />1,7 <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained <br />within these <br />drawings comply with the 2017 <br />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 />W <br />E,y' <br />Q <br />c� <br />aD O 00 <br />f° <br />O V N N <br />Oppp m <br />N n N <br />co J <br />LE. <br />�j 0 <br />H <br />MM 0)J <br />� <br />'7 -j <br />LL <br />LJc. d <br />a <br />13 N <br />Z <br />N <br />yco <br />�mLL <br />> <br />a, <br />w yu w <br />aa� <br />0 o <br />@ 4: o <br />00 O <br />W <br />M 0 r- <br />2 Ec' <br />m <br />o a <br />Z <br />ILW <br />0) 9 N 0 <br />N Q M <br />Q O 7 <br />Z <br />Q <br />U <br />U H J <br />❑❑❑ <br />W <br />� <br />Z o <br />0 0 <br />� co <br />Z N <br />O <br />� <br />Q <br />J C) <br />d N <br />N <br />(7 <br />f6 <br />/—L/nn O <br />W <br />V LL <br />(10 <br />ui 0 <br />W p <br />d Q <br />Q) <br />O <br />CN <br />cN <br />(p <br />W f <br />c a <br />N <br />rA <br />r— o <br />U <br />W m <br />F— E <br />N <br />O <br />l� .. <br />= <br />U O <br />m <br />O <br />CO <br />w <br />M <br />c> <br />i Z <br />oS <br />Z <br />a <br />_1 <br />W <br />E o <br />i <br />¢N <br />Z <br />Da <br />co <br />OU <br />_ <br />K 0 <br />0 <br />0 <br />Z <br />O ru <br />N <br />pa0 <br /><Z <br />0 <br /><Z <br />KZ <br />W WW W <br />-2 i <br />(Q <br />U) <br />^ <br />0y <br />U <br />N <br />n� <br />O <br />O, <br />Z <br />m <br />Q W <br />fn <br />to <br />a) zs <br />Z Z <br />g 0 <br />U <br />0 <br />a <br />W <br />I F <br /><0 <br />oz <br />r� <br />=3 <br />CZ) <br />O <br />W <br />S <br />0 <br />00� <br />V' <br />za <br />�M <br />0 <br />= <br />Lo <br />cn <br />J <br />a; <br />c� <br />i <br />. <br />tV <br />c <br />(0 <br />ca <br />^ <br />v <br />O <br />Q <br />0— <br />sCfl <br />T <br />')''� <br />CV <br />C: <br />L0 <br />V <br />z C`V <br />r <br />r <br />2 04 <br />N <br />r <br />o Ln <br />M <br />w <br />CV <br />cY) <br />a <br />Z <br />Z <br />E O <br />N <br />CU <br />a <br />E <br />U � <br />Q <br />JOB <br />NO: <br />20-3576 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />