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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 />by Upper <br />SQ. IN. of 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 />' ' <br />Ventilation <br />(See Elev) <br />required <br />needed <br />required <br />soffit <br />by upper <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—B1 <br />SCALE: Y4"=l'-O" <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 / SQ. FT. <br />*If not enough vented soffit is pirmAded due to fire protection, the contractor shall use the <br />following approved vents: <br />e 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 />7� <br />C14 <br />�_EWKOJ' <br />C, <br />1pr <br />ol <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 />Engineers signature and seal. <br />0 <br />W <br />8 E <br />co 8 <br />00 <br />* <br />C�4 <br />rT, <br />0 <br />C) <br />00 Q) <br />:1 LO oo w <br />LL <br />0) <br />(:0 '-_ 'Z _- <br />04 0 <br />L-L L� a- <br />a, <br />C <br />CU LL u_ <br />u:' "i 1 <br />(L uj 3: <br />z <br />0 <br />0 <br />.5 <br />0 l, <br />LL — <br />W <br />(0 <br />02- Y, <br />05 c�' <br />_j <br />o" c'3 < <br />< <br />Z <br />IL <br />00 Ci <br />LO C0 z <br />_j CL <br />w L/) 0 <br />a <br />N < <br />d 3 <br />< :D 0 <br />0 in <br />z <br />W <br />E3 <br />0 .1 <br />W <br />U) <br />Ln <br />M <br />E <br />8 <br />co <br />C13 <br />W <br />z <br />z <br />__j <br />LL_ <br />E <br />0 <br />zP <br />< , <br />0 <br />E U <br />'z <br />Z 0 <br />0 <br />r6 <br />CL <br />Mo. <br />so <br />CD E <br />C'j ra <br />t <br />< z <br />'0 <br />< <br />z <br />:3 <br />C/) <br />z <br />V <br />10 <br />zo <br />z <br />z <br />C' <br />z <br />Mj <br />0'. <br />z < <br />.0 C:) <br />> <br />M <br />0 <br />00 <br />0 <br />0 <br />> <br />0 <br />C:) <br />CD <br />C <br />r*.. <br />0 <br />E <br />CN <br />z: 04 <br />LL J <br />cr) 0) <br />LO <br />00 <br />04 <br />CSj <br />4i <br />E <br />r <br />0 <br />z <br />E <br />cc <br />cc <br />E <br />0 0 <br />'D <br />< <br />JOB <br />NO: <br />21-2029 <br />SCALE : <br />AS NOTED <br />SHEE7 NO. <br />5 <br />