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ATTIC VENTILATION CALCULATIONS - 131 (TRB) <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />(No Upper Ventilators <br />1/300 Rule <br />Ridge <br />Vent Amt <br />Off -Ridge <br />Req.) <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />Amt. <br />Total <br />Ventilation <br />ATTIC <br />Provided <br />SPACE <br />SQ. FT. <br />Total SQ. <br />FT SQ. . <br />. . <br />of IN SQ <br />by Upper <br />SQ. IN. of <br />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />SQ. IN . of <br />. . <br />SQINof <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-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 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 />ti <br />r <br />f. <br />i <br />y9g � <br />CE e <br />Y,rt'0f <br />wAt NO i ow, <br />w'LS <br />Ei 'w!� <br />S <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 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 />Engineers signature and seal. <br />N <br />W <br />� 8 co a) <br />O V N N it <br />V <br />O O O <br />M NCq <br />am)Co <br />J J <br />LL LL <br />® <br />I� <br />J a <br />7ry�z <br />J W w <br />�LLaa <br />H <br />Q <br />uj M S <br />i� <br />> <br />W y 2' <br />as W0 <br />.0 <br />aWW <br />y <br />0Wo� <br />UwZ <br />O <br />W <br />W <br />_@ C <br />m a�C° <br />� E rn <br />m m O <br />¢ ¢ O <br />W <br />Z <br />O <br />N Q co Z <br />_J <br />C O J <br />Z <br />�� <br />❑❑❑❑ <br />W <br />M � <br />M <br />N O <br />Z <br />_ � O <br />W NN <br />2 <br />Z ~ Q <br />v <br />Q M <br />d N <br />cd <br />C2 <br />W <br />C lL <br />W O <br />Q <br />D'O^ <br />I I <br />�N <br />W F— <br />E <br />y <br />s°— o <br />0 <br />� m <br />m <br />w e <br />r-- m E <br />s Oin <br />lr <br />S r <br />?J I t <br />0 o N <br />Q o <br />rn <br />�� <br />w <br />M <br />z <br />o <br />z <br />Q O <br />Z <br />W O <br />z <br />� <br />} N <br />Q N <br />z© <br />❑o <br />U <br />w� <br />tCU <br />X <br />t¢ <br />D 0 <br />O <br />OQ <br />Zo <br />N ro <br />L <br />o <br />¢ <br />w w <br />y-r <br />• pp <br />U)L <br />o <br />w <br />m 0 <br />O <br />} Z <br />m <br />¢m <br />Zz <br />og <br />z <br />ao <br />U <br />¢ <br />ao <br />oz <br />_ <br />r F <br />=3 <br />O <br />w� <br />�0 <br />y0 <br />a <br />c <br />ch <br />oza <br />�3 <br />0 <br />`M <br />= <br />N <br />>M <br />L <br />� <br />C6 <br />(6 <br />■> <br />�1\ <br />co <br />N <br />QQ <br />N <br />O <br />O <br />m <br />-N0 <br />L.L <br />d' <br />r <br />N <br />CD <br />d7 <br />z N <br />s— <br />T <br />rLO <br />T <br />o <br />�- <br />E <br />CU <br />= <br />T N <br />M <br />o <br />z <br />t@ <br />z <br />E O <br />V1 <br />c <br />d <br />E <br />U J <br />a w <br />Q d <br />c <br />J <br />JOB <br />NO: <br />20-1123 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />