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ATTIC VENTILATION CALCULATIONS - B1 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 />by Upper <br />SQ. IN. of <br />of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQIN of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />. . <br />Ventilation <br />(See Elev) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />22 <br />2 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <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 FLORIDA BUILDING CODE 7TH EDITION (2020) 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 7th Edition <br />(2020) 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 />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SO. FT. <br />• STUCCO SOFFIT VENTS - 126 SQ. IN. OF NET FREE AREA / SQ. FT. <br />*If not enough vented soffit is provided due to fire protection, the contractor shall use the <br />following approved vents: <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. <br />"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed)19 = Linear Ft. of Deck -Air Needed) <br />N <br />O <br />N <br /><D <br />1-E WK0 /-I • <br />i <br />CO PE71375 .** <br />No <br />fir: <br />;cUj <br />OF <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 2020 <br />Florida Building Code - <br />Residential 7th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />r <br />ao <br />E r` <br />8 � � <br />Q <br />LL <br />co <br />.5 ao °vii at W W <br />N <br />M <br />rn r-- r,� -+ W a <br />Mc u.CLY <br />a <br />J LL LL � a <br />7' <br />0Wp <br />tY O <br />OL0_ <br />N _Fj <br />rnW Q <br />LL <br />U' a <br />NCl)) Z cr n <br />O U_jyZO <br />O0❑ <br />c <br />z Np co <br />z <br />Z 1O� <br />Q v <br />rz ,� <br />N <br />- N <br />(� <br />pWC <br />�-J <br />O <br />V <br />N <br />W <br />Q A <br />W <br />0 <br />0 <br />w <br />11i <br />c `'4 <br />W 2 <br />w 8 <br />_® <br />= <br />Of C9 <br />pp Y <br />• <br />Q O <br />(V (T <br />CO <br />w <br />M <br />1 i <br />O <br />Z <br />J <br />� <br />E <br />E <br />¢ <br />2� <br />�O <br />E: V <br />w <br />10 <br />0s <br />a a <br />00 <br />�a <br />zKz <br />O E <br />N <br />i <br />oa <br />ap <br /><o <br />ado <br />¢ < <br />wW <br />rr � <br />d <br />rp <br />N c <br />N O <br />m� <br />O <br />gLL <br />z <br />d�J <br />J <br />b <br />Q W <br />i <br />W <br />N <br />U <br />r <br />0� <br />� <br />0 <br />Z <br />ao <br />K <br />it <br />o <br />z <br />w <br />=I� <br />k7 <br />>g <br />a <br />CO <br />z< <br />ti <br />�3 <br />/O <br />0 <br />0 <br />L <br />� <br />CN <br />U <br />Ln <br />•> <br />CN <br />Q <br />> <br />O <br />0 <br />a <br />m <br />O <br />^C <br />E T <br />r <br />`o CV <br />Lo <br />= N <br />1 O <br />r <br />= N <br />T Q� <br />a000 N <br />r <br />ai <br />M <br />L0 <br />N <br />M <br />o <br />Z <br />z <br />E 10 <br />�; <br />ig a <br />E <br />U _j <br />Q p <br />JOB <br />NO: <br />21-2033 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />