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ATTIC VENTILATION CALCULATIONS <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 <br />of vented <br />IN. of <br />of <br />ventilation to <br />SQ.Ventilators <br />IN. oftilation <br />IN. of <br />SQ,lation <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Venti <br />(See (SElev) <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-Al <br />SCALE: %4"=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 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 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 />gtt1 i <br />r? <br />\,' `•Fly-jt� � <br />• CV <br />4.�'.: <br />���feF s+t•. hFgl ��": <br />To the best of the Engineers knowledge, information and belief, <br />the structural plans and specifications contained <br />within these <br />drawings comply with the 2020 Florida Building Code - <br />Residential 7th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />W 'It E <br />ao 0 <br />oo <br />o Co �* <br />N <br />_ O N <br />oo J <br />c # LL <br />V y oo <br />N cn <br />My <br />a JLLLLI <br />13'0 <br />W o- <br />W °- Y <br />a�� <br />0 O <br />— a rn <br />O �p <br />� O <br />W��°'°' <br />Z L Mz <br />LLIL <br />ILW <br />rcnO <br />Z O U <br />U_j U) <br />Z N M <br />O � <br />Z N <br />z o � <br />Q <br />U) <br />E3 <br />� /1 M <br />�/ � Z �6 <br />1V1JO <br />l <br />-1 <br />Lu <br />[O <br />V® <br />O^ LLJ O <br />�V 1 <br />(n <br />6-- <br />U <br />Lu <br />J <br />H _ E <br />i <br />U o N <br />o <br />tm, <br />Q <br />14 <br />c <br />W <br />M <br />coS <br />J <br />zZ <br />z <br />� <br />LL <br />� <br />w <br />zo <br />oo <br />z <br />zo <br />¢� <br />o O <br />rd <br />zp <br />�o <br />z© <br />oa <br />UO <br />cu <br />X U <br />O ¢ <br />W U <br />O <br />o E <br />N <br />°z <br />wo <br />a z <br />�z <br />L <br />. ra <br />Q O <br />m o <br />O <br />Y <br />U <br />N <br />O <br />z <br />J <br />m <br />< ° <br />¢ W <br />z <br />to <br />O Q <br />z O <br />Q U <br />MEN <br />SSS <br />a <br />mw <br />lim <br />(, <br />) <br />¢ o <br />_ <br />o w?(D <br />=r <br />00 <br />�¢ <br />l¢ <br />o <br />o <br />d' <br />z <br />� 3 <br />O <br />T <br />i <br />>IL) Ln <br />O <br />2 <br />co <br />W <br />L � <br />Q� o <br />M <br />' U <br />r <br />a) <br />N <br />_ <br />Q <br />Y o <br />O <br />U <br />m <br />'^ <br />V/ <br />O <br />T <br />v (D <br />T <br />70 2 N <br />r <br />LO <br />r= <br />M rn L <br />r <br />T M <br />0 <br />N <br />M <br />Z <br />:3 iri <br />E O <br />E <br />U 0 <br />C <br />a <br />Q p <br />.a) <br />JOB <br />NO: 21-5015 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />