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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 ol <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 />VENTED SOFFIT 48 SQ. FT. * RIDGE VENTS 15 SQ. IN. OF NET FREE AREA I LINEAR Fr. <br />a OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA I UNIT <br />F a SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SO. 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 = (Unear Ft. of Deck -Air Needed) <br />ZONE-3 e O'HAGIN (Tile Roo� - 86.25 SQ. 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 />F <br />ATTIC SPACE <br />U_ <br />280 SQ. FT. <br />C3 <br />... .74 <br />- ---------- ........................... ............... .......... <br />...................................... ........ ......... <br />00 <br />o ................... <br />U_ <br />U_ <br />0 wl .. <br />C/) A VENTED SOFFIT 42 SQ. FT. <br />,X <br />LU <br />:A <br />LU <br />ZONE-4 :.7. <br />:.7. <br />ATTIC SPACE <br />oA 1740 SQ. FT. V7. <br />LL. <br />Cr .'A <br />Cf) 7.1 F ** <br />E== <br />LL. <br />0 <br />cr) :.A <br />M <br />LU .. Lj_ <br />LU ... U) <br />LL_ <br />LL_ <br />0 <br />U) <br />Uj <br />:z <br />.7. <br />:A ILLI <br />o o� <br />I I I I o I 1 0 a e 0 o 0 0 0 0 0 a 0 <br />o .1 <br />LL- <br />7.7 <br />d . . . . . . . <br />o <br />W <br />o o I <br />ATTIC VENTILATION CALCULATIONS - B <br />ATTIC VENTILATION REQUIRED UPPER VENTILATION PROVIDED <br />LL_ <br />0 11150 Rule <br />VENTED SOFFIT 26 FT. U) 11300 Rule Ridge Vent Arnt <br />(No Upper Ventilators (Must Provide Upper Ventilators) (Ft.) Off -Ridge Amt. <br />Req.) <br />LU <br />Total Ventilation <br />............. . POO o o Provided by <br />- ----------------------- LU ATTIC <br />SQ.FT SQ. IN. of Upper <br />SPACE SQ.FT. Total SQ. Ventilators <br />SQ. IN. of of vented I N. of of ventilation to <br />ventilation vented be provided <br />Soffit ventilation Ventilation Ventilation <br />ZONE-2 ZONE-1 SQ. IN. of SQ. IN. of (See Elev) <br />Soffit by upper <br />required needed required <br />needed ventilators <br />ATTIC SPACE <br />ATTIC SPACE <br />U_ <br />269 SQ. FT. Main 0.0 0.0 <br />45 SQ. FT. W Floor 269 258 37 129 9 65 0.0 <br />.. ........................... -11 (Zone 1) 0.0 0.0 <br />o .7. C14 <br />Main Floor 0.0 0.0 <br />.... .... .7. 45 43 6 22 2 11 0.0 <br />VENTED SOFFIT 15 SQ. 7o LL_ (Zone 2) 0.0 0.0 <br />0 <br />... Cn <br />..... ... Upper Floor 0.0 0.0 <br />17.1. M 280 269 38 134 10 67 0.0 <br />o 0 0 ... LU (Zone 3) <br />0.0 0.0 <br />0.0 3.0 <br />7: LLJ Upper Floor <br />. . . . . . . . . . . . . . . o . . . . . . . . . . . . . . . . . . . . 418 414.0 <br />.7: (Zone 4) 1740 1670 239 835 60 <br />0.0 414.0 <br />I o o **NOTE** <br />.... ............ GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />............. o o. <br />..................... 0.. . 0 . . . . <br />- - ---------- --------- REQUIRED BY FBC 5th ED. RESIDENTIAL. <br />T VENTED SOFFIT LEGEND <br />VENTED SOFFIT 70 SQ. IFT. <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 />........... <br />. . o . . . . . . . . . . . . . . . . - VENTEDSOFFIT <br />.......... o <br />ROOF PLAN-B_ <br />SCALE: Y4"=V-0" <br />LO <br />Cl) <br />Z <br />77 (0 <br />z <br />ZV) (D <br />Q) C-/) <br />4-J L1j <br />0 <br />U <br />0 LLJ 1- E <br />rw 0 <br />to C0 <br />V) 00 <br />C%1 <br />C) CD M <br />M <br />mm <br />E al cv) <br />0 C, <br />:�r-: LL <br />Q) :3 - <br />0 W 0 .2 <br />CL 0 <br />Ln 0:S <br />< 0 6 <br />AT N-C B D C <br />C <br />B D. F <br />ur) <br />co <br />M <br />LO <br />V <br />6 <br />C, <br />0 <br />Nq 0 LU <br />U 9�,� <br />c, <br />co <br />LU <br />o� <br />A E I 'D <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 5th 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 />c) <br />C:) <br />Z r-4 <br />0 (V <br />4_j C:) <br />> rn C:) <br />p <br />1`0 Lr) <br />cn R4r <br />0 <br />a) - In <br />C LL <br />CL e-s <br />ry) <br />ce- 3- 0_ 00 <br />z < - E <br />Z 3 � <br />W Lu C� <br />_j 0 <br />z <br />0 <br />02 z <br />Lu LL <br />Lu Z <br />LL, . Z!i aw <br />U F- X' <br />0 <br />z z <br />E 00- <br />z U 2: <br />l­- z z, z <br />= - z <br />Lu -Liu <br />Um ?: 8 -:, <br />V) a ce C3 <br />= 2 �) uj N <br />1-- 0. 0 z <br />C:) LU z <br />M ce <br />C:) <br />Lr) <br />C�4 <br />r*4 <br />Ln <br />LU <br />< Z U <br />LU a 0 0 <br />0 Z <br />0 < U LFU- <br />Z < E <br />=5 Lzu <br />fu Z CL z CY �5 0 <br />Lu LL, <br />'D 2 80 <br />U3 �i 6 <br />> -J k*.._000 z 0 <br />0 U_ z <br />LU <br />< F- 0 <br />CYX LL <br />V) z <br />C) LL _j LU <br />< <br />0 M <br />c) ry) <br />z - - 0 <br />LU z 0 <br />> 0 <br />z <br />1­4 _j <br />SCALE : AS NOTED <br />PLOT DATE 12/7/2012 <br />TECH: EPAND <br />VERSION NO. <br />1525 <br />JOB NO: 16-6651 <br />SHEET NO. <br />7 <br />