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ATTIC VENTILATION CALCULATIONS - Al (TRA) <br />ATTIC VENTILATION REQUIRED 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 />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Ventilation <br />(See Elev ) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />I (ZoneFloor <br />1) 2373 2278 325 1139 81 570 435.0 138.0 573.0 I <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-Al <br />SCALE: J4"=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 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 />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. 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 / Fr. <br />"Formula: (Sq, Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft, of Deck -Air Needed) <br />v '*G <br />P1, - Ok <br />W <br />w <br />To the best of the Engineers 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 />Engineers signature and seal. <br />W <br />F. <br />r` <br />v E °�° <br />o roi8 o�xk <br />o <br />♦� <br />yCy <br />2 — aD $ ik LL W <br />N N. <br />O L L d a <br />m LJiLL 'L W S <br />z <br />rN°'_oI <br />W <br />ip C� Lo LY O <br />'Z <br />IL <br />a <br />N � Z w 0 O <br />Z <br />O U U_j W <br />W <br />❑ ❑ ❑ <br />U <br />mmN <br />z m <br />z <br />J — <br />d � <br />U) <br />N <br />N <br />znn .9c9 <br />'' <br />f_f <br />V O <br />W <br />C n <br />io <br />V <br />� <br />O <br />LU 8 <br />N <br />f.N <br />N <br />c <br />(u <br />U d <br />C) ' <br />c 04 � <br />� 0 <br />• <br />S <br />r` <br />CD <br />10 <br />Z <br />M <br />J <br />LL <br />E E <br />u�-3C <br />W <br />�z <br />0a� <br />20 <br />O <br />FC6 r0 <br />_ <br />w <br />�a <br />oa <br />so <br />o <br />z <br />O <br />O <br />N <br />a p <br />az <br />W OQ <br />°do <br />¢ z <br />wz <br />¢ <br />,4: L <br />(6 <br />(n= <br />ZZ <br />UY <br />y <br />m� <br />O <br />ZLL <br />Z <br />O <br />Q W <br />z <br />�0 <br />o <br />O <br />W <br />N1 <br />w <br />_ <br />cotD <br />isaj1, <br />J <br />�L <br />O <br />T <br />L <br />co <br />.--� <br />Q <br />Y <br />O <br />m <br />U4-1 <br />Cfl <br />7— <br />cco r <br />I� <br />r-O N <br />T <br />o) Lo <br />T— <br />T <br />CV <br />lwt <br />o <br />Z <br />M <br />E p <br />a <br />0 _j <br />Q o <br />� <br />JOB <br />NO: <br />21-5016 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />