Laserfiche WebLink
1 <br />ATTIC VENTILATION CALCULATIONS <br />ATTIC VENTILATION REQUIRED <br />I 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 />i Total SQ. <br />SQ. FT. <br />SO. IN. of <br />b Upper <br />Y ppe <br />SQ. IN. of <br />of vented <br />IN. of <br />f o <br />ventilation to <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Ventilation <br />(See Elev) <br />required esoffiterie <br />needed <br />required <br />soffit <br />by upper <br />i <br />I <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 />! <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"=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 />• 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 />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained <br />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 />F <br />Q <br />v E <br />O M <br />O n# <br />N N <br />N J <br />V <br />0 <br />O C <br />�' aO ]�aD (-A <br />J LL <br /># LL W <br />fA <br />�rn <br />CN,1C) <br />- W a <br />' a Y <br />a <br />J U_ W <br />a L. <br />Z <br />C) <br />O' <br />♦Y <br />L N <br />4:5 '@ N co <br />7 <br />LL O J <br />W <br />in�O'�jQ' <br />¢ ! d <br />Z <br />LLW <br />Go <br />N Cl)Z <br />a <br />iY (n O <br />Z <br />O V <br />U u) <br />W <br />❑�❑ <br />z N M <br />z � g <br />(D <br />J <br />QE3Q <br />N <br />z a <br />U o <br />Q) <br />u- <br />4--J N <br />C U <br />O <br />w g <br />/) <br />Ly N <br />I <br />N <br />C <br />U13 <br />pE <br />U p b <br />LC a� <br />Q 0 <br />� <br />I_• <br />N <br />O <br />M <br />ch <br />o <br />z <br />" <br />u <br />W <br />Q > <br />z a <br />o2 <br />CU <br />F- <br />E O <br />x� <br />¢OzO <br />�� <br />� <br />woZ <br />ttw <br />U) <br />O U <br />z <br />U) J <br />y m <br />< <br />z W <br />f3 <br />I <br />o¢ <br />z z <br />0 <br />g <br />w0M <br />d <br />W <br />U <br />oLL <br />z <br />Jzco <br />�� <br />a <br />001 <br />�! <br />i¢ <br />C C)O <br />L6 <br />CD <br />W <br />0 <br />�— <br />o <br />O <br />M <br />L) <br />O <br />Q� <br />o <br />° <br />O <br />(0o <br />� <br />� m <br />T <br />co O <br />= N <br />LO <br />0') <br />00CF) <br />T' <br />T <br />E <br />r <br />M <br />o <br />z <br />� <br />z <br />� <br />E O <br />v; <br />CU <br />C <br />Eca <br />a: <br />U ° <br />¢ a <br />� <br />JOB <br />NO: <br />21-1072 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />