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ATTIC VENTILATION CALCULATIONS - Al <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 />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 />Main <br />0 <br />0 <br />Floor <br />33 <br />32 <br />5 <br />16 <br />1 <br />8 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />7 <br />2 <br />Floor <br />1535 <br />1474 <br />211 <br />737 <br />53 <br />368 <br />381.0 <br />105.0 <br />276.0 <br />(Zone 2) <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 />ZONE-1 <br />ATTIC SPACE <br />33 SQ. FT. <br />ROOF PLAN <br />SCALE: %4'=l'-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 SO. IN. OF NET FREE AREA / SQ. FT. <br />• STUCCO SOFFIT VENTS - 126 SO. 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 />r <br />/ <br />5RO "J`✓AV ��gr <br />J Y, ° <br />._✓ <br />••''°., <br />^r. dad •. •••°• �e <br />'siMil°16������� <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. Engineer's signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />W <br />�i <br />co co <br />a E co <br />O (vCj Q c0 3t <br />v N <br />op <br />N N m # LL <br />Q <br />Xk LL <br />co N W <br />7 <br />w a <br />N) <br />�,r-r� - <br />a. <br />M V U.lA <br />Q <br />N <br />Juu.LL 3 n. W 3 <br />O <br />Z <br />tr <br />Lm�o <br />a <br />�(N� &gam <br />W <br />ca <br />° <br />rgrn4 a <br />z <br />a <br />N Cl) Z 0: In O <br />Z <br />U <br />pU cUn <br />W <br />❑�❑ <br />z N M <br />O <br />z <br />z <br />Q � <br />N <br />M <br />z <br />GX <br />� o <br />W a <br />O„ <br />N <br />C m <br />Rigt— <br />U d <br />c <br />J pEp <br />L U <br />m I <br />zl Y <br />U <br />Q <br />• <br />O <br />to <br />J <br />w <br />Cl) <br />M <br />�¢ <br />Z <br />o <br />z <br />Q <br />� <br />LL_ <br />Q 0 <br />E O� <br />z�s <br />w� <br />Z® <br />❑a <br />Fcu (O <br />_ C <br />O C <br />N <br />x o <br />U <br />a F <br />o <br />¢o <br />0 o <br />p <br />0 Q <br />az <br />Q <br />�w <br />L <br />(d <br />U) C <br />_ <br />❑ <br />Z <br />y <br />U <br />m O <br />oLL <br />Z <br />m <br />Q W <br />z <br />y <br />w <br />g <br />Z o <br />5z <br />a <br />� <br />? <br />rn w <br />O <br />yz <br />w <br />WF <br />=3 <br />�o <br />�t <br />zla <br />°dT� <br />3 <br />O <br />G O <br />i <br />co <br />O n <br />r <br />W <br />m <br />f4 <br />M <br />J <br />N <br />^ <br />a <br />O <br />CL <br />U <br />C m <br />CL <br />co <br />L0 <br />co <br />r <br />'�_ <br />_ <br />= N <br />r <br />U <br />oo O <br />Cq <br />LO <br />N <br />= O <br />o <br />'— <br />ui <br />E <br />V <br />c <br />M N <br />o 0 <br />W <br />z <br />E 0 <br />iA r <br />c <br />a <br />U _j <br />Q p <br />JOB <br />NO: <br />21-1074 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5.0 <br />