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ATTIC VENTILATION CALCULATIONS - 131 TRB <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1l300 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. 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 nsoffiteeded <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'-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 SO. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. 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 />\VNVpNsrf,�,�rr¢�• <br />.. * <br />% <br />Cla <br />F•E S S`O <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 <br />Florida Building Code - <br />Residential Bth 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 />H <br />E m <br />8 N <br />Q <br />O J <br />101LL <br />M M r LL , <br />a <br />rrl W N <br />si�ii ayw0 <br />Z <br />13ci <br />0 <br />Q g, <br />g to °� O f- <br />�i <br />W <br />A C m O <br />io or�� <br />a, < 'L 0 <br />Lus ? <br />_JQ <br />va&d c0no <br />N <br />z <br />o000 <br />W <br />U <br />z <br />z <br />a <br />U)L,l <br />_ M <br />Z <br />Ou <br />N <br />� Q <br />0 <br />,., 4 <br />N <br />c <br />w <br />U <br />c <br />• <br />O <br />M <br />M <br />m <br />Z <br />w <br />Z <br />o� <br />E <br />aa3 <br />w <br />Z <br />C <br />N <br />L <br />�0 <br />� <br />o <br />ww <br />¢� <br />C� <br />6p <br />m0 <br />OLL <br />Z <br />rn <br />8� <br />Z" <br />U az <br />W <br />U <br />�o <br />oLL <br />�w <br />�� <br />J <br />� <br />yz <br />�a <br />10 <br />�� <br />a F <br />�t <br />°zla <br />u 3 <br />CM <br />>M <br />� <br />IM <br />W <br />cD <br />LO <br />N <br />0 <br />H <br />Wm <br />a <br />CO <br />N <br />q. <br />LO <br />Z N <br />T <br />LO <br />r <br />2 L o <br />°n° <br />N <br />T- <br />E <br />c <br />M <br />Z <br />W <br />Z <br />E O <br />E <br />N <br />M <br />c <br />a <br />U J <br />Q <br />J <br />JOB <br />NO: <br />20-1129 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />