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ATTIC VENTILATION CALCULATIONS - B1 (TRB) <br />ATTIC VENTILATION REQUIRED I 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 />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 />( ) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main 21,00000 2.000000 <br />Floor 2377 2282 326 1141 81 570 0 591.0 <br />(Zone 1) 315.0 276.0 <br />—NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 6th ED. RESIDENTIAL, <br />ROOF PLAN - ELEV-B1 <br />SCALE: 14"= V-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 < <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 / SQ. FT. <br />*If not enough vented soffit is provided due to fire protection, the contractor shall use th <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 />-a <br />Ri IL <br />w <br />� <br />{e <br />�5 <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. Engineers signature and seat is only for <br />the structural engineering portions <br />of the drawing pages bearing <br />Engineers signature and seal. <br />N <br />W <br />Am disk <br />Q <br />CD <br />n <br />E � co <br />O � $ N n # <br />v <br />0 <br />m4 <br />� C.# LL <br />(PJ <br />t1 <br />cn r r- w <br />N v a <br />Q <br />�[ <br />M IT 0 <br />Q: <br />W0gT <br />5 'Fa N O m J <br />Z <br />IL <br />¢on <br />Lo cNnz rYNO <br />N <br />W <br />OU v <br />❑�❑ <br />W <br />( D 'n <br />Z N M <br />O � <br />O <br />J <br />QL M <br />N^, <br />- N <br />M <br />���pn� <br />12 <br />W <br />(D O <br />u- <br />1 ' <br />C <br />W <br />® 0 <br />U <br />OLLi <br />O <br />(n <br />O <br />IasiH <br />W N <br />_ o <br />L O <br />} <br />ziW <br />l « N <br />O W <br />O <br />W <br />M <br />z <br />o <br />z <br />Q <br />2 <br />LPL <br />0CU <br />zo <br />Wo <br />? <br />>F, <br />¢� <br />O P <br />OU <br />as <br />0 OU <br />O, <br />Q <br />CDXz <br />i <br />a z <br />WO <br />¢O <br />tt <br />W w <br />d <br />(6 <br />m0 <br />O <br />TZ <br />J <br />a 8 <br />Cn <br />o� <br />ZgZ z <br />mom <br />N <br />Q s <br />2< <br />wLL <br />j00 <br />a <br />�w <br />'S <br />ao <br />�- <br />O <br />GO <br />V <br />4l <br />z¢ <br />� <br />O <br />> Lo <br />Li. <br />N <br />W <br />.! <br />0 <br />o <br />O <br />M <br />LL <br />> <br />N <br />C U <br />o <br />O <br />�1 <br />O <br />0 <br />r <br />0 <br />o N <br />M <br />I O <br />co CD <br />00 N <br />LO <br />r <br />r <br />.— <br />N <br />M <br />o <br />z <br />E O <br />003 <br />a_ <br />a <br />U .°� <br />Q r7 <br />� <br />JOB <br />NO: <br />20-8093 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />