Laserfiche WebLink
E <br />H <br />ATTIC VENTILATION CALCULATIONS - 131 TRB <br />ATTIC VENTILATION REQUIRED <br />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 />b Upper <br />y cape <br />SQ. IN. of <br />ventilation of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />. . <br />SQINof <br />. <br />SQIN. of <br />Ventilators <br />(See Elev ) <br />required soffit <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />needed <br />required <br />needed <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—Bl <br />SCALE: Y4'=l'-0" <br />I Attic Ventilation I <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 comice 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) 19 = Linear Ft of Deck -Air Needed) <br />0 <br />0 <br />N <br />O <br />N <br />CO <br />N <br />LElWK <br />*• No P <br />7 0 <br />:LT <br />• <br />tJ <br />10 <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 />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 />� <br />W <br />Q <br />h <br />�O N8 <br />L4 <br />LL <br />N6 <br />O <br />co W <br />a�rN�aa <br />o <br />(9 r' r` a <br />Z <br />0 <br />0 <br />t - Z; <br />•�co O j <br />Lco <br />Z <br />d a <br />u) r.Nj 2 6' N O <br />= <br />pV cS_jrvn <br />W <br />DDD <br />z N <br />Z <br />Z <br />J <br />N <br />p <br />XZ <br />63 <br />N <br />W <br />Tom• <br />V <br />• ° <br />0 <br />Lu s <br />t� <br />C N <br />fa <br />r-- in <br />w W <br />U <br />2 • <br />w <br />c'� <br />ii <br />of <br />io <br />Sp <br />LL <br />Z>� <br />E <br />r0 <br />W ? <br />.I o <br />�Qo <br />U <br />-0 <br />oa <br />8o <br />z <br />O M <br />N <br />i <br />a. <br />o <br />ao <br />Sao <br />° <br />az <br />z <br />¢w <br />2 <br />rp <br />fi <br />C <br />�s <br />o <br />z <br />z <br />(3) <br />aw <br />O <br />W <br />d <br />d <br />(Tj <br />o¢ <br />W u <br />a <br />w w <br />J <br />= <br />v <br />�I <br />°3 <br />O <br />LL <br />O <br />ro <br />m <br />0 <br />L <br />0) <br />/ <br />J <br />T <br />Q <br />• � <br />,c <br />N <br />O <br />U <br />m <br />U <br />I— <br />n' <br />M p <br />r <br />= N <br />r <br />,Lo <br />�! <br />T <br />M <br />T <br />r <br />E <br />L <br />N <br />M <br />o <br />z <br />z <br />� <br />O <br />" <br />Iv <br />a <br />U _j <br />Q p <br />JOB <br />NO: <br />21-4277 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />