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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 1/300 provided that at least 40% <br />but no more than 50% of the required ventilation is provided in the upper portion <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 FOLLOWNG VALUES, SEE ROOF PLAW <br />(Values to be verified with Manufacturer Specifications) <br />VENTED SOFFIT 48 SQ. FT. * RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. <br />e OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />e SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT. <br />............................................................................... ............................ <br />A"* A" AAW JAW a *ff not enough vented soffit is provided due to fire protection, the contractor shall use the <br />following approved vents: <br />9 LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. <br />e O'HAGIN (Tile Roof) - 86.25 SO. IN. OF NET FREE AREA / VENT <br />..Formula: (Sq. Ft. Soffit Needed) x 7 (Sq. In. Needed) / 86.25 = Amount of O'Hagin Vents Needed <br />ZONE-3 "Formula: (Sq. Ft. Soffit Needed) x 7 (Sq. In. Needed) 19 (Linear Ft. of Deck -Air Needed) <br />F_:XA ATTIC SPACE <br />F--: <br />d :X 280 SQ. FT. <br />........................... <br />00 ­­­1 * , , , , * * * * o * * <br />o *0*:.V.7oV ......... 0 ...... .......................... ................. ...... ........ <br />F_ --- <br />UL_ ... ... <br />c:> . .:-:.I . . . . . . <br />VENTED SOFFIT 42 SQ. FT. <br />LU <br />LU <br />::A <br />::A ZONE-4 <br />ATTIC SPACE <br />1740 SQ. FT. <br />LL_ <br />d <br />W <br />LL_ <br />ILL. <br />C> <br />W <br />C1 <br />LLJ LL_ <br />d <br />LU :A U) <br />... C14 <br />ILL. <br />:A C) <br />* * U) <br />A M <br />LL1 <br />F_ <br />:A M <br />U_j <br />:A <br />:A <br />Xoj <br />:A <br />:A <br />j ILL. <br />d <br />A W <br />CD... ... <br />::::::j ATTIC VENTILATION CALCULATIONS A <br />F- <br />::::::j LL_ ATTIC VENTILATION REQUIRED UPPER VENTILATION PROVIDED <br />ILL- .:.o. <br />.7A VENTED SOFFIT 26 SQ. FT. 0 .1.7 1/150 Rule <br />E 7.1 <br />U) ... 1/300 Rule Ridge Vent Arrit <br />o.. ... (No Upper Ventilators Off -Ridge Amt. <br />... rovide Upper Ventilators) (Ft.) <br />C1 (Must P <br />uj Req.) <br />VM .. .... Total Ventilation <br />* * . - . ... 0". ... ..... . <br />............... .. <br />................... ..... ...... LLI Provided by <br />ATTIC <br />... SPACE SQ. FT. SQ. IN. of Upper <br />::A ... SQ. IN. of SQ. FT. Total SQ. of ventilation to Ventlators <br />ZONE-1 of vented IN. of SQ. IN. of SQ. IN. of (See Elev) <br />ventilation vented be provided <br />ZONE-2 required soffit ventilation soffit by upper Ventilation Ventilation <br />needed required needed ventilators <br />ATTIC SPACE <br />ATTIC SPACE 7 <br />0 0 <br />Main <br />269 SQ. FT d <br />W 0.0 0.0 <br />45 SQ. FT. IR4- Floor 269 258 37 129 9 65 0.0 <br />...... CS4 (Zone 1) 0.0 0.0 <br />....... tox. <br />.o.. Fx. ILL- Main Floor 45 43 6 22 2 11 0.0 0.0 0.0 <br />L.L. (Zone 2) <br />VENTED SOFFIT 15 SQ 0 <br />FT. 0.0 0.0 <br />Upper Floor 0.0 0.0 <br />7 UJI 67 0.0 <br />(Zone 3) 280 269 38 134 10 0.0 0.0 <br />F_ <br />LU Upper Floor 0.0 3.0 <br />�> 1740 <br />.. . ............ 1670 239 835 60 418 414.0 <br />(Zone 4) <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 70 SQ. FT. VENTED SOFFIT LEGEND <br />--j IF SOFFIT IS LABELED AS "NON -VENTING" FIRE PROTECTION VVILL BE INSTALLED <br />AS REQUIRED BY SECTION R302 OF THE FBC 5th EDITION (2014) RESIDENTIAL. IF <br />LABELED AS"VENTED", NO FIRE PROTECTION W LL BE REQUIRED. <br />VENTED SOFFIT <br />ROOF PLAN -A <br />SCALE: Y4"=V-0" <br />(.D!P 0 <br />z CV) <br />-0 <br />< <br />I <br />z <br />V) 0 <br />Q) C-f 3 <br />4--J Lu <br />U <br />0 LU E <br />0 <br />0 <br />W Cl) <br />V) .2 <br />C) a) CC,*,) <br />M Cl) <br />LU a W Cl) <br />E J! :,a cv,) <br />8 000 <br />r- LL 00 <br />0." <br />co 6-8 <br />U) 0 --t <br />< 6 <br />--c'. --c <br />8 Do <br />CD <br />LO <br />U3 <br />1"z 0 V4 N m <br />00 <br />2 <br />U) <br />0 <br />A <br />.0 CL <br />. RIUM <br />Hg- <br />11100\1 Q M <br />To the best of the Engineer's knowledge, information, and <br />belief, the structural plans and specifications contained <br />within these drawings comply with the Florida Building <br />Code Sth Edition (2014) Residential. Engineer's signature <br />and seal is only for the structural engineering portions of <br />the drawing pages bearing Engineer's signature and seal. <br />CD <br />Z 117�4 <br />0 v <br />F-4 4_j C) <br />V) <br />> V) M <br />a <br />N <br />Ln <br />r.L (n C: V- <br />z Ln ON <br />a) - Ln <br />LL <br />cl� U CL 00 <br />< �. �O <br />z z E <br />z <br />LLJ <br />_j C:) <br />W t.0 <br />,Rz <br />LU LL 0 <br />z <br />2c: 0 <br />z >. z < L) <br />E Z 0 0. x <br />Z>- <UX < <br />!-. � 4 Lz. ZZ <br />19 <br />8? �,q, b W, <br />>- CL U 0 L0 <br />OE - US 8 <br />84 :e 0 <br />8, LLj 04 <br />C) 0. 0 z <br />LLJ z <br />11:r cc <br />0 <br />T-1 <br />Ln <br />11714 <br />11714 <br />Lr) <br />W <br />." 0;� <br />Uj I,- �: <br />ce;� ce <br />2 z gLLI a 0 <br />0 < 0 0 LZU W <br />'0 z z Fyx:!zrz 'i <br />fu ui U, OZ (=:1) 0 <br />z <br />Cl) 11-1 L- <br />> z I g, <br />0 u- z 0. <br />LLJ < <br />0<1 W 01: 8 <br />Ce Iz <br />U_ z <br />z < <br />:�j LLI <br />< <br />0. <br />c) rf) LL < <br />z . . .. 0 <br />LU F_ Z 0 <br />> 0 <br />z <br />1­4 1 _J <br />SCALE AS NOTED <br />PLOT DATE 12/7/2012 <br />TECH: FFLORES <br />VERSION NO. <br />1525 <br />JOB NO: 17-1426 <br />SHEEr NO. <br />7 <br />