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ATTIC VENTILATION CALCULATIONS <br />- Al <br />ATTIC VENTILATION <br />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 />- - <br />Total <br />Ventilation <br />ATTIC <br />Provided <br />SPACE SQ. FT. <br />Total SQ. SQ. FT. SQ. IN. of <br />by Upper <br />SQ. IN, of <br />of vented <br />of ventilation to <br />IN. of <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />vented be provided <br />ventilation <br />Ventilation <br />Ventilation <br />(See Elev) <br />required <br />needed <br />required soffit by upper <br />needed ventilators <br />Main 0 0 <br />Floor 33 32 5 16 1 8 — 0.0 <br />(Zone 1) 0.0 0.0 <br />Upper 7 2 <br />Floor 1535 1474 211 737 53 368 _ 381.0 <br />(Zone 2) 105.0 276.0 <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 />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 />Q'•;''s.E-'•• <br />F'0 <br />Q ; <br />... <br />,(P <br />c <br />J <br />� <br />F L-0 <br />to <br />F <br />E a S 10 \\\� <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained <br />within these <br />drawings comply with the 2020 <br />Florida Building Code - <br />Residential 7th Edition. Engineer's signature and <br />seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />to <br />S <br />a <br />N CII <br />LL <br />ii <br />Q <br />aC0 y <br />*k LL W <br />(Ii <br />Q <br />fJi r` L <br />ej N 0 <br />J W a- <br />LL. N <br />J LL LL <br />SY� <br />rl „LLB S <br />Z <br />r m 5; <br />gam_ <br />d' <br />N <br />le t0 <br />LL <br />m J <br />W <br />LL <br />0'6 <br />¢a <br />Z <br />00 <br />N 04Z <br />0 U <br />(Qyjyo <br />0 J N <br />Z <br />❑ ❑ ❑ <br />W <br />z N <br />� <br />zoo <br />¢v <br />J <br />d � <br />Z' M <br />-9 <br />fi^t''W <br />CD S <br />W � <br />� <br />O <br />L' $ <br />N <br />w m <br />c <br />Q <br />N O! <br />(~Q <br />M <br />N <br />K <br />W <br />z <br />Cl)o <br />J <br />'a <br />L.L <br />8O <br />CIO <br />� U <br />C <br />R <br />w <br />Z <br />O E <br />N <br />i <br />o� <br />iq <br />w x <br />io <br />��y <br />tY <br />C <br />C <br />�� <br />x <br />y <br />ms <br />�n <br />r <br />zN <br />__ <br />� <br /><Z <br />a� 3 <br />0 <br />a <br />WN <br />IIIIIIIIIIIII� <br />� <br />CD <br />K 4 <br />KIj <br />z. <br />i <br />�C <br />> CO <br />J <br />c� <br />L <br />� <br />C) <br />n/ <br />0 <br />0 <br />a <br />L.L <br />LL <br />o <br />C m <br />= <br />O <br />Lo <br />N <br />= Cy) <br />0 <br />,— <br />m <br />N <br />M <br />o <br />z <br />Z <br />E O <br />E <br />N <br />a <br />U _j <br />Q 0 <br />JOB <br />NO: <br />21-5703 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5.0 <br />