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ATTIC VENTILATION CALCULATIONS - Al (TRA) <br />ATTIC VENTILATION REQUIRED 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 needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />I (ZoneFloor <br />1) 2373 2278 325 1139 81 570 435.0 138.0 573.0 I <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: Y4"=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 SO. 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 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 />,i <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 <br />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 />9) <br />W E <br />O M 80 <br />U) <br />r` <br />r- <br />P # <br />N <br />N N <br />iI C <br /># J <br />(0J t <br />7 �; 00 y <br />M yrr o <br /># , W <br />Lu a_ <br />� C� <br />d Y <br />J LL LL <br />°- <br />z <br />N Vim0 ' <br />.0 <br />'�Nco <br />W <br />ELO <br />co <br />Q <br />���rn <br />ILW <br />¢ <br />a <br />IL�_ N Cl) z <br />ixN 0 <br />Z <br />❑ ❑ ❑ <br />Cl) M <br />O 0 <br />N <br />� <br />J <br />Q N <br />n <br />E3 <br />M <br />V) Z� O <br />`✓ Ll. <br />N <br />C) <br />s-oft <br />�0 LUYZ <br />V <br />LLI J <br />E <br />L <br />U3 <br />MonV O y <br />Q 0 <br />®00 <br />• <br />Q <br />N <br />O <br />O <br />J <br />w <br />Mz <br />o <br />z <br />z <br />< <br />J <br />9 C <br />zo <br />-0 <br />WZ <br />> <br /><c�u <br />Z® <br />0a <br />F— fd <br />Cl <br />731PO E <br />52 U <br />�¢ <br />p <br />oQ <br />NfuZ. <br />o <br />az <br />�w <br />L <br />C <br />C <br />_ <br />z <br />p Y <br />U <br />m0 <br />O <br />Z <br />z <br />ro <br />Q W <br />'T <br />LL <br />zN <br />Z <br />5z <br />a <br />mW <br />¢o <br />oz <br />�� <br />O <br />a¢ <br />=� <br />ID <br />�O <br />Oo <br />V <br />zl¢ <br />3 <br />2 C) <br />N <br />>Lo <br />L <br />12 <br />cc <br />. _ a <br />L.n <br />N <br />aa)) <br />.-% <br />> <br />O <br />O <br />r1 <br />0 (J <br />(D <br />jl \ op O <br />r <br />co N <br />U) r <br />r <br />rn <br />r <br />E <br />E M <br />N <br />0 <br />z <br />OU) <br />cc <br />_ <br />ii <br />0 _j a 0 <br />_ <br />JOB <br />NO: 21-1079 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />s <br />w. <br />5 <br />