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ATTIC VENTILATION CALCULATIONS - Al <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 />by Upper <br />SQ. IN. of of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Ventilation <br />(See SElev) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />0.000000 <br />0.000000 <br />Floor <br />33 <br />32 <br />5 <br />16 <br />1 <br />8 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />7 <br />2.000000 <br />Floor <br />1535 <br />1474 <br />211 <br />737 <br />53 <br />368 <br />381.0 <br />105.0 <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 />ZONE-1 <br />ATTIC SPACE <br />33 SQ. FT. <br />ROOF PLAN <br />SCALE: %4"=V-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 11300 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 / SO. FT. <br />a <br />Ind <br />C <br />c- <br />0 <br />EL <br />r <br />�N 1 �ASE s�� <br />se <br />0 <br />tRtt, <br />5 � <br />e <br />LV <br />�, V <br />a• Se <br />see <br />� <br />. �� e • 6 Q <br />sn.as..es� <br />41 <br />A��'IZA/���i <br />sglt` <br />�r�ssss <br />��pS' <br />To the best of the Engineer's 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 />Q <br />Q <br />O r "T N N <br />OO 07 o <br />po # <br />® <br />N J <br />M 00 LL <br />—� * W <br />0 <br />0 <br />w J <br />5LLN 2 LL LL a. <br />(1)W c <br />13 <br />M S W <br />>ciL_ aaLU <br />= <br />0Z <br />i- <br />Wa)0 <br />@v�0cc= <br />m0 <br />o��MI@ <br />W <br />2 E T o°- <br />Z <br />Ci <br />N Q M Z V O J <br />z <br />°� ❑o I <br />W <br />z N O <br />o <br />Q N <br />U) <br />, r <br />~ <br />_ M <br />z <br />O <br />0 LL <br />11T J <br />� V <br />.O^ <br />— <br />Y <br />LAJ O <br />Q <br />, , , F- <br />O <br />o <br />coo, <br />all <br />� <br />U M <br />O 8 <br />Imo. <br />U o <br />� u7 iu <br />0 <br />COC7 <br />W <br />co <br />o <br />ZZ <br />a <br />LL_ <br />E <br />z o <br />} o <br /><i <br />Q <br />E ° <br />< <br />?® <br />°� <br />f6 <br />X O <br />0 00 <br />O 1 <br />O <br />N <br />N <br />a o <br />¢p <br />¢ o <br />az <br />Ww <br />i <br />ro <br />z <br />Y <br />U <br />m <br />~O <br />O , <br />Z <br />Qi <br />J <br />ym <br />°<' <br />Qz <br />1z <br />cn <br />aNi <br />o <br />� o <br />a <br />mw <br />ao <br />o� <br />_r <br />�— <br />3 <br />O <br /><QCD <br />To <br />co <br />¢ <br />zla <br />x <br />UO <br />J <br />�N <br />>L <br />tM <br />L <br />`° <br />0 <br />LO <br />.> <br />c <br />O� <br />f° <br />J <br />N <br />^ <br />O <br />CL <br />0 <br />O <br />m <br />� <br />� <br />LO <br />o <br />O <br />■— <br />Z O <br />s— <br />N <br />= Lo <br />to N <br />LO <br />r <br />0 <br />o cy <br />o <br />z <br />E O <br />co r <br />Z <br />c <br />E <br />c <br />IL <br />C) _j <br />v <br />a 0 <br />JOB <br />NO: <br />20-1789 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5.0 <br />