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ATTIC VENTILATION CALCULATIONS - 131 (TRB) <br />ATTIC VENTILATION REQUIRED 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) <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 />I(Zloorone 1) 2377 2282 326 1141 81 570 315.0 276.0 591.0 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-Bl <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 / 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 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 />CV <br />O <br />CV <br />CO <br />CV <br />O <br />o6`�s'tee9rrtr����� <br />I..... f (���p�, <br />"4�0 :•• 5�13 P F 7 g7 �� ,� � r <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 />- <br />Residential 7th Edition. Engineer's signature and seal <br />is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />fA <br />uu) <br />W <br />Co <br />v E U <br />�8 �_� <br />Q <br />p N <br />N <br />CN <br />U J <br />j Qp <br />00 0 ik LL W <br />/& I� <br />fn r - J Uj a <br />Cq 0 u a Y <br />Q <br />Cn <br />mLLU- a w <br />O <br />_ <br />`- <br />ca <br />�o O <br />O <br />W <br />� rn a Q00 Q <br />Z <br />a <br />N M Z of to O <br />ZO <br />V U J (� <br />W <br />❑❑❑ <br />N M <br />O � <br />Z N <br />z o � <br />J <br />n <br />Vi <br />M <br />z a19M <br />o <br />-6 <br />i--J cn <br />(� w <br />m <br />U <br />O <br />w o <br />Ly N <br />'N <br />r rn <br />U <br />LLr J <br />= L •j <br />III <br />L W <br />¢ N m <br />M <br />o <br />Z <br />LL <br />E <br />E � <br />a= <br />z® <br />�� <br />co <br />XO <br />0O <br />O, <br />Q <br />O E <br />CV <br />a¢ <br />¢ Z <br />o <br />W Z <br />w <br />L <br />a <br />Z <br />m O <br />O LL <br />_ C <br />Oy <br />U <br />�� <br />Z h <br />rli J <br />¢� <br />QW <br />2 Z <br />son <br />U) 3 <br />Q <br />02 <br />g° <br />a <br />U <br />w <br /><o <br />nw <br />oz <br />3 <br />>O <br />o <br />w¢ <br />Z ¢ <br />a3 <br />OU 3 <br />.0 O <br />2 <br />a) ' <br />u , <br />O <br />m <br />f0 <br />L <br />1` <br />U <br />d' <br />> <br />CV <br />Q <br />> <br />o <br />O <br />i; <br />s <br />0 <br />C0 <br />m <br />o <br />E <br />"It <br />r <br />co <br />= N <br />T <br />T <br />N <br />T <br />w <br />M <br />o <br />E <br />cc;= <br />� <br />iri 04 <br />z <br />z <br />E O <br />U <br />Q p <br />JOB <br />NO: <br />21-2030 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />- I I ___11 - - _F_ - , <br />