Laserfiche WebLink
Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 5th Edition <br />(2014) 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 o <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 />• RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. <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 />*If not enough vented soffit is provided due to fire protection, the contractor shall use tt <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)19 = Linear Ft. of Deck -Air Needed) <br />• O'HAGIN (Tile Roof? - 86.25 SQ. IN. OF NET FREE AREA / VENT <br />"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed)186.25 = Amount of O'Hagin Vents Needed <br />ATTIC VENTILATION CALCULATIONS - B <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1/300 Rule <br />Ridge Vent Amt <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />Off -Ridge Amt. <br />Req.) <br />Total Ventilation <br />Provided by <br />ATTIC <br />Upper <br />SPACE <br />SQ. IN. of <br />SQ. FT. <br />Total SQ. <br />SQ. FT. <br />of <br />SQ. IN. of <br />ventilation to <br />Ventilators <br />ventilation <br />of vented <br />IN. of <br />vented <br />be provided <br />SQ. IN. of <br />SQ. IN. of <br />(See Elev) <br />required <br />soffit <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />needed <br />required <br />needed <br />ventilators <br />Main <br />7.0 <br />4.0 <br />Floor <br />3235 <br />3106 <br />444 <br />1553 <br />111 <br />776 <br />657.0 <br />105.0 <br />552.0 <br />(Zone 1) <br />0.0 <br />0.0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0.0 <br />0.0 <br />0.0 <br />**NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 5th ED. RESIDENTIAL. <br />VENTED SOFFIT LEGEND <br />IF SOFFIT IS LABELED AS "NON -VENTING" FIRE PROTECTION WILL BE INSTALLED <br />AS REQUIRED BY SECTION R302 OF THE FBC 5th EDITION (2014) RESIDENTIAL. IF <br />LABELED AS "VENTED", NO FIRE PROTECTION WILL BE REQUIRED. <br />VENTED SOFFIT <br />ROOF PLAN-B <br />SCALE: %4"=V-0" <br />LID <br />Z M <br />O <br />— o <br />Z <br />Z <br />Q <br />+� Z <br />W <br />N <br />�U - <br />I <br />0 t1.1 <br />F— <br />VIMV <br />ti <br />M <br />LU <br />f— E <br />t6 Cl) <br />� N <br />® U <br />oil <br />20 <br />4) <br />-00 <br />Y iz <br />�Y <br />¢0 <br />a� <br />CL <br />Qo <br />AL <br />D. <br />N CC - C <br />Y.0 <br />pp <br />1 <br />N LO <br />M <br />O O <br />CO LO <br />0 r— <br />c, <br />V �t etrtt �� y€!{d <br />O O <br />Z Z <br />�sp� � aD p x <br />LL. LL <br />CI,.,,MJJO <br />.ter �., lrz <br />�y���J .�"rg 0 �* <br />W 4 <br />R <br />i <br />\I <br />Z . <br />� <br />_ J Z <br />� <br />a <br />To the best ofthe Ep`'Iperrns know) ita&mq <br />rspeti onsf� <br />, and <br />ned <br />belief, the structural plans'an a <br />within these drawing .t ,MpjyAitp,tF�%,Etorlt g Bull <br />ing <br />Code 5th Edition (2014) R'esidentia0Engineer's sig <br />ature <br />and seal is only for the structural engineering porti <br />ns of <br />the drawing pages bearing Engineer's signature an <br />seal. <br />0 <br />Z N <br />O N n <br />H o <br />> M <br />M <br />I1`0LLn <br />o <br />(A 0 <br />Ln <br />AS <br />1<1 <br />� � � <br />CL <br />Ln <br />Ce V <br />Q � <br />rn <br />00 <br />� <br />Z �. <br />WLJ.J <br />d- <br />J <br />w�0 <br />z <br />Z <br />LU <br />N <br />z � � <br />UF�W00 <br />Z > <br />z a U <br />Z Q Q <br />_ Z <br />Q Q <br />W ~ Z <br />�? :5 W <br />LU <br />� J <br />U <br />OaO�Uo <br />H <br />CCC <br />N <br />O <br />w <br />� <br />S W <br />J <br />� <br />1__q <br />Lli <br />N <br />L.f) <br />J <br />Yo <br />azW <br />in� <br />�0z�0 <br />w <br />co <br />'0 <br />z <br />z CY <br />W <br />O <br /><] <br />^' <br />z <br />LU <br />Wow <br />zoo+ <br />> <br />J <br />�� 7 <br />0 0 <br />w <br />~ <br />LL z <br />0 <br />9�2WO0 <br />Q <br />N <br />N ^ <br />v)dXLz <br />'IJDF�W <br />LL <br />0zz <br />QQt-� <br />0 <br />d- <br />o <br />N <br />�. <br />z <br />0 <br />> <br />O <br />0 <br />g <br />z <br />J <br />°' <br />SCALE : AS NO <br />ED <br />PLOT DATE: 12/7/2 <br />12 <br />TECH: MJA14ES <br />VERSION NO. <br />106 <br />JOB NO: 16-6653 <br />SHEET NO. <br />4 <br />