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1 '•1IM"'WW1' 11 in +111' 1I q Imo+ <br />ATTIC VENTILATION CALCULATIONS - B1 TRB <br />ATTIC VENTILATION <br />REQUIRED <br />1/300 Rule <br />UPPER VENTILATION <br />Ridge <br />Off -Ridge <br />PROVIDED <br />1/150 Rule <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 />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />See Elev <br />( ) <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 />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-B1 <br />SCALE: Y4'=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 SO. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SO. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SQ, FT. <br />df.0 ,1�4��r <br />To the hest of the Engineers knowledge, Information and belief, <br />the structural plans and specifications contained within these <br />drawings comply with the 2017 Florida Building Code - <br />Resldential 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 />W <br />fV N N LJL <br />r- - LL LL d <br />Q <br />Cj <br />yMM <br />LL W rA <br />uj <br />1 O <br />Z <br />J LL <br />a <br />grn � 0 <br />W <br />��gm Coo <br />o' ` ag '' <br />L = <br />N° J°� <br />N cOZ 0 3 <br />z <br />0000 <br />W <br />z <br />z <br />� <br />LL <br />Co4-0 <br />0 <br />U <br />, <br />W W <br />0co <br />W 8 <br />�tn <br />co <br />now <br />w m <br />¢ <br />Q <br />M <br />J <br />E25 <br />01 <br />W6 <br />0 <br />g U <br />z <br />CD <br />O fO <br />i <br />��y= <br />c� <br />tj C <br />20 <br />�a <br />of <br />z <br />Jo <br />m <br />S <br />z <br />W <br />3� <br />Op <br />Y <br />y� <br />a <br />�a <br />ila <br />u 3 <br />c <br />c <br />T <br />�i. <br />M <br />WCD <br />.! <br />00 <br />> <br />� <br />o <br />o <br />m <br />CU <br />2 <br />CO <br />O N <br />1r <br />cr) <br />.� <br />T <br />N <br />Ln <br />r <br />iri <br />00 <br />� <br />r <br />Z <br />E <br />N <br />Z <br />C <br />a <br />E <br />:: <br />o <br />c <br />r0 <br />JOB <br />NO: <br />20-6577 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />