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Ln <br />0 <br />00 <br />O <br />I <br />Qf <br />m <br />to <br />N <br />O <br />J <br />00 <br />O <br />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. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />required soffit <br />ventilation <br />vented <br />be provided <br />by <br />Ventilation <br />Ventilation <br />(See Elev ) <br />needed <br />required <br />soffit <br />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 />1 276.0 <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 />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 11300 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 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) / 9 = Linear Ft, of Deck -Air Needed) <br />}},,ggRRgggg <br />oOEIa <br />gg ggpp <br />®IiSC Bff ITiiF/�p�/ <br />(ri <br />I4-jg t <br />�,��m,�S <br />�s <br />zz <br />l_ try <br />"4 E•�. <br />n <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 <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 />W <br />AAM �p <br />e` <br />0 <br />00 <br />v E � 00 <br />M <br />3 N co® <br />V <br />Q <br />t0 <br />w <br />000 <br />co *k , <br />to <br />Q <br />N V <br />Cu ii <br />t,L d Y <br />3 a U, <br />U <br />CIU3 <br />mc��5 <br />o <br />1% <br />.r- <br />5 Nc_4 <br />O~09.j w <br />�O J <br />W <br />(n ' <br />M< <br />¢ a <br />IL <br />N M <br />. <br />a <br />Z � rn O <br />W <br />W <br />❑�❑ <br />N <br />O <br />O <br />M <br />� <br />N <br />O <br />Q � <br />n <br />U) <br />— N <br />0.1 <br />LtJ � <br />�OW <br />� v , <br />V1U) <br />r y� <br />V � <br />L'U <br />+— — <br />E <br />B <br />t <br />_ � <br />ti <br />C) o <br />Lv rn <br />Q N <br />• <br />�� <br />OW <br />O <br />Co <br />J <br />W <br />MZ <br />o <br />Z <br />z <br />U- <br />Q. <br />z o <br />wO <br />> <br />Z" <br />oa <br />m V <br />O Ez <br />XU0U <br />00 <br />!J <br />Aiv <br />AV <br />EN <br />CV M <br />i <br />¢o <br />a n <br />Wz <br />r>3 <br />- <br />� <br />m� <br />0 <br />oLL <br />in J <br />m <br />¢� <br />)z <br />�Z <br />50 <br />�w <br />NLL <br />�3 <br />O <br />wa° <br />co <br />Z. ¢ <br />a <br />OVOV 3 <br />C C:)L <br />O <br />N <br />> L6 <br />N <br />nL' <br />W <br />m <br />O <br />O <br />j <br />i� <br />C V <br />0 <br />^ <br />CL <br />O <br />m <br />/r2R <br />V <br />//�� <br />(D <br />O <br />1— <br />co <br />6 <br />LO <br />V/� <br />00 <br />i <br />W <br />w LO <br />0) <br />CM <br />r <br />6 <br />M <br />z <br />N <br />E (D <br />m <br />z <br />m <br />C <br />CU a <br />U � <br />Q <br />p <br />� <br />JOB <br />NO: <br />21-1078 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />