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ATTIC VENTILATION CALCULATIONS <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1l300 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 />_ <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 />SO. 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 />required soffit <br />ventilation <br />v <br />vented <br />soffit <br />be provided <br />by upper <br />Ventilation <br />Ventilation <br />(See Elev ) <br />needed <br />required <br />needed <br />ventilators <br />Main <br />- <br />-1:78 <br />- <br />19 <br />- 2 <br />-_-_ <br />Floor <br />2276 <br />2185 <br />312 <br />1092 <br />546 <br />561.0 <br />285.0 <br />_ <br />276.0 <br />(Zone 1) <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 SO. 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 />70 <br />>.6—O <br />rl- O <br />cv <br />p <br />0-0 <br />C_ <br />Qm x <br />M LL 0- <br />Q <br />'d O L <br />C7 MO M <br />II <br />� � C <br />C <br />Q� <br /><[ O M <br />U Q) <br />Q N C) <br />w0>= <br />w Q) Q 0 <br />E C <br />Q M 0 O O <br />=3 <br />T <br />V <br />> a- W <br />N <br />N <br />O <br />N <br />1 <br />r- <br />N <br />[V <br />O <br />ti <br />- yy <br />aa' <br />- <br />s1ti <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 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 />co <br />" C, <br />8 �� <br />U. <br />di <br />4! W <br />(A --r W a. <br />M u. o. Y <br />�i <br />Z <br />di <br />R L. LL103 a <br />�. <br />t m O Q <br />ra �ONtD �J O <br />W <br />Z <br />I IL L <br />2 ¢ 9 d <br />a k <br />MZ <br />a <br />N ¢Qyo <br />O U <br />W <br />0 <br />CD <br />_z <br />z f; <br />J <br />W1 <br />l <br />T <br />� <br />V <br />C—,, LL <br />W <br />j <br />OW <br />C/1 <br />8 <br />N <br />c d <br />U <br />Q <br />• <br />S <br />r <br />o <br />M <br />W <br />LL <br />E <br />Q <br />a�O <br />Z <br />ca <br />o <br />N Eg <br />R <br />(t <br />c <br />o T— <br />Ln <br />L / <br />J <br />01 <br />0 <br />^W'LO <br />j p <br />N <br />Y <br />Y <br />O <br />m <br />co <br />m <br />c <br />N <br />C14 <br />N <br />0 <br />0) <br />LO <br />r <br /><CN <br />T <br />m <br />LOv; <br />T <br />N <br />O <br />Z <br />Z <br />I] <br />E <br />U � <br />Q 0 <br />c <br />°i <br />JOB <br />NO: <br />22-02385 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />