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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 />SQ. IN. of <br />b Upper <br />y pPe <br />SQ. IN. of <br />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />. . <br />SQINof <br />SQ. IN. of <br />Ventilators <br />(See Elev ) <br />required soffit <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />needed <br />required <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—Bl <br />SCALE: 1/4 "=V-0" <br />I Attic Ventilation I <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 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 />4op <br />�,� •. <br />�^ r <br />•• <br />J , ` V <br />r6��i� <br />it' t' EtL`�ittt <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 <br />Code - <br />Residential 6th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />to <br />Q <br />O E;N R_.Ik <br />ti <br />eM' N ^ y <br />aN0 LL <br />Chi <br />_J . <br />LL N 2 <br />co <br />LLJ a <br />LL <br />a <br />N M S <br />; Co LL 52 <br />WL y <br />d CL W <br />Z$itO13 <br />= <br />— <br />CL <br />vU)°v� <br />o <br />F <br />m <br />a 'W' <br />2 E T m <br />m m <br />¢ i <br />Z <br />CLW <br />, N o <br />d. <br />O <br />z M Z <br />Z <br />U <br />❑❑❑ <br />W <br />z `O <br />g <br />z <br />J P'I <br />� <br />U) <br />{Np <br />W <br />�N <br />''z^^ C <br />V LL <br />■ <br />4-, <br />•v <br />...�f�f�fp¢p¢p¢ <br />0 <br />w r- <br />V1 <br />V) <br />c E <br />o <br />� <br />U 00 <br />w c <br />0 <br />*> <br />U 1� - <br />Q � o <br />CD <br />co <br />Ch <br />Cl) <br />w <br />z <br />-J <br />LJ <br />E <br />o <br />z <br />d <br />O01,0 <br />20 <br />B <br />F- n3 <br />0 <br />aoW <br />20 <br />o <br />Zo� <br />N (D <br />i <br />°Go <br />ao <br />Wz <br />� <br />( <br />mi <br />r p <br />ZLL <br />r <br />Z <br />CC <br />a) <br />J <br />mom <br />7 ° <br />>z <br />�m <br />N <br />N <br />a <br />� <br />gLL <br />Za <br />o <br />Wa <br />U� <br />'Z <br />TW <br />o <br />m;5 <br />F� <br />FX� <br />v <br />�I< <br />OM <br />2M <br />> M <br />� <br />c� <br />> <br />00 <br />p <br />C) <br />° <br />m <br />0 <br />C <br />CD <br />E N <br />T�/�� <br />cc O <br />Y /LO <br />T <br />00 <br />ui <br />E <br />0) <br />o <br />Z <br />E 0 <br />N <br />Icac c <br />a <br />U � <br />Q p <br />JOB <br />NO: <br />20-3572 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />