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ATTIC VENTILATION CALCULATIONS - Al (TRA) <br />ATTIC VENTILATION REQUIRED I 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 />v <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(Zloor1) 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: %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 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 / FT. <br />**Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft. of Deck -Air Needed) <br />N <br />O <br />N <br />N <br />N <br />M <br />O <br />av�� .•'GINS �•• <br />'.�/ v <br />w <br />w C� .`fit <br />t) <br />.z. �E77 <br />;p <br />to <br />C) <br />.� <br />' F <br />oo10N <br />4 <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 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 />n <br />f• o E m co <br />QO , 8 N ti # <br />O N J <br />Lo LL, <br />U N oOo Lo <br />v a <br />LL <br />NMV y rY <br />Q ,z LL W 3 a.Lu <br />L O <br />K <br />0 z �_ 0o <br />OO W 0 <br />M Co <br />W Wa <br />K Z cn O <br />Z oo N � a <br />L LL <br />Z O U U y <br />W ❑ ❑❑ <br />z N Mp <br />O b <br />z � <br />z � <br />d <br />Q $ <br />E3 <br />M <br />WV) <br />`z`n w <br />o <br />V <br />1 ' L <br />W <br />� m <br />V <br />O W o <br />N c N <br />�N <br />(� a— in <br />(J <br />i <br />Lu J <br />U <br />= L <br />N <br />U o <br />01 <br />N m <br />14 <br />f` <br />O <br />w <br />Mw <br />cy,M <br />o <br />z <br />Q <br />� <br />LJL_ <br />Q E <br />O <br />z o <br />oo <br />> <br /><N <br />zo <br />00 <br />H <br />�� <br />U <br />o <br />KF <br />oo <br />�o <br />O <br />oQ <br />O <br />N t <br />i <br />° Z <br />o <br />a <br />Z <br />,,..N <br />. !d <br />U <br />_ C <br />o <br />o. <br />� U <br />m o <br />o <br />oz <br />z <br />J <br />4W <br />zz <br />uJ <br /><d <br />go <br />2 <br />a <br />�w <br />JW <br />LF <br />C� <br />v <br />z. <br />d ti <br />° 3 <br />.N O <br />2 <br />i Ln <br />1/•,L� <br />O� <br />N <br />L <br />Cfl <br />� c <br />co <br />d- <br />•> Y <br />N <br />Q <br />O <br />4-1 <br />in <br />r <br />r <br />2 N <br />� <br />T <br />� <br />N rn <br />Lii <br />T— <br />_ 000 N <br />r <br />� <br />`� <br />.. <br />E <br />E CV <br />z <br />cc <br />Z <br />E O <br />E <br />JOB <br />NO: 21-4278 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />