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:7 <br />g <br />4j <br />EE <br />ATTIC VENTILATION CALCULATIONS - 131 TRB <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />ATTIC <br />1/150 Rule <br />1/300 Rule <br />SPACE <br />(No Upper <br />(Must Provide Upper <br />Vent Amt <br />Off -Ridge <br />Ventilators Req.) <br />Ventilators) <br />(Ft.) <br />Amt. <br />SQ. IN. SQ. FT. <br />Total <br />Ventilation <br />Total SQ. <br />SQ. <br />SQ. IN. of <br />SQ. IN. <br />SQ. IN. of <br />Of of <br />IN. of <br />FT. of <br />ventilation <br />of <br />Ventilation <br />Provided <br />ventilatio vented <br />ventilatio <br />vented <br />to be <br />Ventilatio <br />by Upper <br />n soffit <br />in required <br />soffit <br />provided by <br />n <br />Ventilators <br />required needed <br />neede <br />upper <br />(See Elev) <br />d <br />ventilators <br />Main <br />22 <br />2 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <br />606.0 <br />330.0 <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-B1 <br />SCALE: Y4'=1'-0" <br />I 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 o <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 / SO. 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 SO. 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 />v �� rL(° . <br />F6� <br />L e` <br />"OFE S •• ONr\���\ <br />To the best of the Engineer's 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 />Engineer's signature and seal. <br />W <br />� <br />c] se <br />0 <br />i�,i <br />CVO � ( ii <br />"O 2 u W <br />�Ma t`aY <br />Lu <br />a <br />t7 <br />Z <br />_j <br />r `m °' 0 <br />00 <br />0 <br />Z <br />a0 <br />N M0 toQ <br />9JN <br />Z <br />W <br />OU <br />❑ ❑ ❑ <br />_z <br />z <br />z <br />J <br />1 <br />W <br />Z <br />1 }{J�, <br />Tf13 <br />•U <br />TTLL� <br />W <br />J` <br />O <br />�N <br />LU N <br />� V <br />~ <br />U <br />C <br />• <br />� <br />QQ~ <br />M <br />Y�jj <br />Q <br />J <br />LA_ <br />Ecg <br />E <br />fT <br />w` <br />5t <br />ZO <br />w l <br />ZE <br />FCo <br />sM <br />w_ t <br />Zi�tv <br />03Rl <br />y�< <br />g& <br />W <br />A <br />A <br />�0', <br />J <br />L <br />°1 <br />U <br />LO <br />^ <br />Q <br />/� <br />' <br />O <br />O <br />r1 <br />L 0 <br />a <br />O <br />co <br />r— <br />(LO pLO <br />Q± <br />.� <br />T <br />= N <br />r <br />T <br />i I� <br />00 N <br />1— <br />M <br />N <br />"' <br />z <br />W <br />Z <br />E O <br />o <br />a. <br />0 _j <br />¢ 0 1 <br />3 <br />JOB <br />NO: <br />20-8090 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />