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I Ir�rtLq I; u <br />ATTIC VENTILATION CALCULATIONS <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1l300 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 />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />19 <br />2 <br />Floor <br />2276 <br />2185 <br />312 <br />1092 <br />78 <br />546 <br />561.0 <br />285.0 <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 />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 />e OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />e SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SQ. FT. <br />• STUCCO SOFFIT VENTS - 126 SO. 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) / 9 = Linear Ft. of Deck -Air Needed) <br />CV <br />O <br />CV <br />CV <br />(V <br />CO. <br />O <br />�• Lc: �vkOi °i <br />```e�� <br />�. .•�G . N <br />140 PE78750 '. • <br />ST OF <br />S- .T <br />C> ••. P,- <br />fill It', <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 />ti <br />Q C) � N r- it <br />M <br />o N 4 J <br />t.i , 0' yCy J LL <br />- <br />LL <br />0 u1 00 N it W <br />0 NM� LL a'! <br />Y <br />J LL LL rl K <br />0 _ M V <br />Z/ O <br />SS <br />ti to LL 0 J <br />��i� a a d <br />W i <br />Z <br />&L a <br />N co x N 0 <br />Z pV U�rVn <br />W ❑O❑ <br />04 <br />z � <br />z <br />- IY <br />,,zn MCC <br />V O <br />fa w m <br />G) <br />O ,,, <br />N <br />c d <br />�Ln <br />Q3 <br />U„ f— — E <br />'® m $ <br />t <br />U <br />c c, <br />• <br />¢ N c, <br />�Op <br />M <br />w <br />W <br />M <br />� <br />U <br />zo <br />no <br />>� <br />aR <br />zp <br />I— <br />�o <br />x U <br />oo <br />z <br />0. <br />o <br />N f0 <br />,a <br />N <br />¢z <br />wo <br />QU <br />az <br />wz <br />d � <br />ro <br />C <br />duo <br />o <br />mg <br />r o <br />Oz <br />z' <br />z <br />Q) <br />J <br />° <br />a- <br />Q w <br />zz <br />z <br />d <br />o <br />o. <br />go <br />a <br />� z <br />W <br />� 3 <br />Ro <br />.z <br />�K <br />w <br />>� <br />o <br />t0 <br />'� <br />w <br />za <br />a <br />o3 <br />> LO <br />O <br />CO <br />m <br />0 <br />L � <br />> v <br />N <br />.-. <br />- > <br />O <br />Q <br />° <br />C <br />H <br />E <br />L <br />t— <br />0 <br />.� to N <br />� <br />TT_ <br />00 rn N <br />r <br />r <br />.L <br />O M rn <br />E <br />M 04 <br />Z <br />Z <br />N <br />E CD <br />c <br />a <br />E Y <br />0 Q o <br />JOB <br />NO: 21-4272 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />