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ATTIC VENTILATION CALCULATIONS - Al (TRA) <br />ATTIC VENTILATION REQUIRED I UPPER VENTILATION PROVIDED <br />1/150 Rule 1/300 Rule <br />(No Upper Ventilators (Must Provide Upper Ventilators) <br />Req.) <br />ATTIC <br />SPACE <br />SQ. FT, <br />Total SQ. <br />SQ. FT. <br />SQ. IN. of <br />SQ. IN. of <br />of vented <br />IN. of <br />of <br />ventilation to <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Ridge <br />Vent Amt Off -Ridge <br />(Ft.) Amt. <br />Total <br />Ventilation <br />Provided <br />by Upper <br />SQ. IN. of SQ. IN. of Ventilators <br />Ventilation Ventilation (See Elev) <br />Main 29 1 <br />Floor 2373 2278 325 1139 81 570 573.0 <br />(Zone 1) 435.0 138.0 <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 />ROOF PLAN - ELEV-Al <br />SCALE: Y4 "=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 11300 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 / SO. 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 SO. IN. OF NET FREE AREA / FT. <br />"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) 19 = Linear FL of Deck -Air Needed) <br />0 <br />111fl0tl� j�J�i <br />•:�,ts!!!!!! <br />^ C* <br />N <br />d . <br />W <br />W <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specfications contained within these <br />drawings comply with the 2020 Florida Building Code - <br />Residential 7th Edition. Engineers signature and seat is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seat. <br />LO <br />E Co <br />- <br />o $ 8 at: <br />ma0�LL <br />� LL. <br />Q <br />•Z' a0 it W <br />r'nnr-13 LL W a- <br />y- M a � <br />N <br />SY� <br />kCLLLL I a W S <br />J O <br />= <br />tk�acvog� 00 <br />pNko xO <br />W <br />"j' <br />IL <br />CD d a <br />00 a <br />tn0 <br />Z <br />N k.N)Z <br />do U3YA <br />W <br />❑❑❑ <br />Z� <br />J <br />d <br />``Znn CC <br />�4-J <br />V O <br />LL <br />to <br />W <br />w <br />,ax, <br />N <br />C <br />L=Lj <br />C) <br />C <br />acliw <br />• <br />s <br />O <br />Cl)o. <br />W <br />L <br />1 <br />J <br />LL <br />k$ <br />65 <br />w0 <br />�0 <br />� _ <br />zo <br />QE <br />CL <br />�z <br />R o <br />a <br />§ o <br />Z <br />N � <br />D <br />z <br />tr <br />(d <br />� <br />F () <br />z <br />� <br />U, <br /><z <br />d <br />a � <br />8 <br />wLL <br />aU <br />Z <br />�W <br />W <br />i 3 <br />i; <br />8 EE <br />�k <br />=I� <br />� <br />= <br />� <br />CO <br />55 <br />r <br />i 3 <br />C O <br />> LO <br />0 <br />(0 <br />01 <br />cc <br />t0 <br />L <br />� <br />N <br />C Co <br />tv <br />r <br />M C,4 <br />d' <br />0) <br />� <br />r <br />_ <br />-r <br />o <br />N <br />LO <br />r <br />00 <br />E <br />M <br />Z <br />z <br />E C:)�' <br />m <br />a <br />ctv <br />i <br />JOB <br />NO: <br />21-1075 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />