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ATTIC VENTILATION CALCULATIONS - 131 JRB) <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 <br />of vented <br />IN. of <br />of <br />ventilation to <br />SQIN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />. <br />Ventilation <br />Ventilation <br />(See Elev � <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />22.00000 <br />2.000000 <br />Floor <br />1999 <br />1919 <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: %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 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 / 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 />w w _ <br />t <br />.• <br />100 g <br />�E <br />t 0 <br />F L O *� <br />�p•'o'A� <br />0 46 S ^" tk <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. Engineers signature and seal is only for <br />the structural engineering potions of the drawing pages bearing <br />Engineer's signature and seal. <br />W <br />a Q 'SE3 <br />m <br />N tO o) <br />U a)� C* <br />oo LL <br />N rn ti - <br />> <br />Q j rNi m <br />Jww <br />u- -j p- <br />w <br />w LU <br />LU <br />aaa <br />C' <br />Z m e <br />W O <br />X m O <br />, W o 2 <br />2 OI <br />m <br />4 M <br />co d <br />N 0 <br />(*) <br />LL <br />d' 0 N <br />�'� <br />p. <br />V N ¢ <br />Z O U <br />U J <br />nEl❑ <br />W <br />N M <br />O O <br />b Q <br />Q � <br />J <br />r <br />I^ M <br />I L <br />c <br />n' 0 <br />VJ o <br />/.1� <br />/1�CC � <br />` v cs? <br />Lu <br />[U <br />�/^'� <br />rn <br />U ai <br />c <br />} J Eo <br />c§ <br />C) O <br />W Y <br />• <br />r <br />ro <br />z <br />irw c <br />M <br />ti <br />o <br />z <br />¢ <br />J <br />u_ c <br />OC <br />. ® <br />55o <br />z <br />a D <br />z <br />zt <br />z� <br />¢ N <br />z® <br />oa <br />coo U <br />go <br />t <br />B <br />o<o <br />¢o <br />?p <br />¢ <br />�z <br />CV <br />Sao <br />ttw, <br />mo <br />r6 <br />fu <br />Y <br />O <br />z <br />rz <br />Zffm � <br />AV <br />N <br />o <br />OO g <br />Z O <br />QU <br />_N <br />a <br />j <br />a o <br />�LL <br />= <br />o <br />L� <br />>° <br />m <br />�Y <br />z ¢ <br />a� <br />> co <br />n� <br />� <br />m <br />m <br />W <br />cU <br />M <br />J <br />O L' <br />m <br />U <br />0 <br />T <br />(D <br />= N <br />f <br />LLo <br />h r <br />Lo <br />r <br />r co <br />M a) M <br />u <br />E <br />cY <br />= <br />o <br />z <br />z <br />E O <br />`c <br />a <br />E <br />U 0 Q Q <br />J <br />JOB <br />NO: 20-6583 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />