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I T I IIII III'I11 1 1 <br />1411"111 <br />ATTIC <br />VENTILATION <br />CALCULATIONS <br />- 131 TRB <br />Attic Ventilation <br />ATTIC VENTILATION <br />REQUIRED <br />UPPER VENTILATION <br />PROVIDED <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 />1/150 Rule <br />1/300 Rule <br />Ridge <br />Off -Ridge <br />space. The ventilating area may be reduced to 1/300 provided that at least 40% <br />g y <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />Vent Amt <br />Amt. <br />but no more than 50% of the required ventilation is provided in the upper portion o <br />Req.) <br />(Ft.) <br />the space to be ventilated. Upper ventilators shall be located no more than 3 feet <br />- - -- <br />- - <br />Total <br />(measured vertically) below the ridge or highest point of the space, with the <br />- <br />Ventilation <br />balance of the required ventilation provided by eave or cornice vents. <br />ATTIC <br />SQ. FT, SQ. IN. of <br />Provided <br />-CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN*" <br />SPACE <br />SQ. IN. of SQ. FT. <br />Total SQ. <br />of ventilation to <br />by Upper <br />ors <br />Ventilators <br />(Values to be verified with Manufacturer Specifications) <br />ventilation of vented <br />IN. of <br />vented be provided <br />SQ. IN. of <br />SQ. IN. of <br />(See Elev) <br />OFF -RIDGE VENTS - 138 SQ. IN. OF NET FREE AREA I UNIT <br />required soffit <br />ventilation soffit by upper <br />Ventilation <br />Ventilation <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SO. FT. <br />needed <br />required <br />. STUCCO SOFFIT VENTS - 126 SQ. IN. OF NET FREE AREA I SQ. FT. <br />needed ventilators <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 SO. IN. OF NET FREE AREA I FT. <br />Main <br />(Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed)! 9 = Linear Ft. of Deck -Air Needed) <br />21.00000 <br />0 <br />2.000000 <br />Floor <br />2377 <br />2282 326 <br />1141 81 570 <br />591.0 <br />_ <br />276.0 <br />(Zone 1) <br />315.0 <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 />N <br />. <br />O��r�\\ <br />1100 <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and speciflcallons contained within these <br />drawings comply with the 2020 <br />Florida Building Code - <br />Residential 7th 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 />� <br />E o^o <br />O N tV pp u_ <br />l l <br />N <br />Q <br />rnr- r-� w a <br />�rNiv � a Y <br />< <br />MLLU_ aw a <br />Z <br />rr O <br />M O <br />c0 lY O _J <br />nr m� <br />�j °' <br />W <br />Z <br />LLW <br />a <br />N M Z � m O <br />Z <br />pV U� tvn <br />_ W <br />❑ ❑ ❑ <br />CD v <br />Z N m <br />z fo`o <br />Q V <br />`r] <br />vi LL <br />•tJ <br />0 <br />LAJ <br />INI ^ <br />Ly N <br />N M <br />GO <br />w <br />(h <br />p <br />< <br />J <br />ll <br />a E <br />O <br />E v <br />zo <br />o� <br />wi <br />Z <br />z <br />z ® <br />oa <br />F— <br />M`'' <br />u° <br />Z <br />C) <br />nq <br />Q zZ <br />Oa <br />W z <br />N, It <br />8 <br />aO <br />m7 <br />in <br />g <br />N <br />o1N= <br />z <br />s° <br />Waj <br />U <br />�j <br />a� <br />y LL <br />r <br />J <br />`J <br />C)ID <br />0 <br />O <br />it E <br />d <br />zo 4 <br />O <br />O <br />i <br />` <br />> Ln <br />.J <br />iv <br />W <br />0 <br />O <br />co <br />J <br />N <br />C V <br />O <br />EL <br />co <br />C) <br />O <br />to <br />r <br />M <br />CV <br />O <br />r <br />Lo <br />O <br />a, <br />r <br />EC <br />z <br />E O <br />r` <br />C <br />a <br />U <br />q p <br />JOB <br />NO: <br />20-8085 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />