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ATTIC VENTILATION CALCULATIONS - 131 (TRB) <br />ATTIC VENTILATION <br />REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule - <br />- - <br />� -I <br />Ridge <br />(No Upper Ventilators <br />1/300 Rule <br />Vent) Off -Ridge <br />Req.) <br />(Must Provide Upper Ventilators) <br />(Ft.) Amt. <br />- -- <br />- Total <br />� <br />Ventilation <br />ATTIC <br />Provided <br />SPACE SQ. FT. <br />S . FT. S . IN. of <br />Total SQ. Q Q <br />by Upper <br />SQ. IN. of <br />of vented <br />IN, of of ventilation to <br />SQ. IN, of SQ. IN. of Ventilators <br />ventilation <br />soffit <br />ventilation vented be provided <br />Ventilation Ventilation (See Elev) <br />required <br />needed <br />required soffit by upper <br />; <br />needed ventilators <br />Main - - - 22.00000 } 2.000000� -- <br />Floor 2000 1920 274 960 69 480 -- - 0 _ _. _ 606.0 <br />(Zone 1) 330.0 276.0 <br />**NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 6th ED. RESIDENTIAL. <br />ROOF PLAN - ELEV-B1 <br />SCALE: %4"=1'-0" <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 6th Edition <br />(2017) 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 />• 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 />Coastal Flashings <br />All flashing material for coastal locations (ex: within 3,000 feet of the <br />ocean) shall be corrosion resistant material (ex: zinc and/or stainless <br />steel) and shall be selected for compatibility with adjacent wood <br />preservatives per the manufacturer's recommendations. <br />J <br />* <br />\` <br />`ff! <br />�t0 CS ., <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 2017 <br />Florida Building Code - <br />Residential 6th Edition. Engineer's signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />to <br />E co <br />pp pip• <br />98 N O r- ik <br />_ <br />Li <br />N <br />O c N r N LL LL <br />(o N ^ y * 00 <br />LL LL nw. a <br />a41 <br />N c" s w fA R <br />CLL 52 a a = Y <br />1 Z=fc�— <br />3W:D <br />0 U) 0 <br />ado O� <br />W <br />IL <br />0, ��a°m <br />�Emo) Ja D0 <br /><NO 60M <br />Z <br />NQraZ U OI <br />Z <br />°� ❑000 <br />W <br />U' 0 <br />p8p <br />Z N O <br />� ryq <br />z <br />Z Q <br />� <br />Q <br />o <br />d N <br />cn <br />v <br />Z c <br />VJ <br />�N <br />_ u- <br />V <br />W O <br />� <br />w � <br />� <br />� o <br />U 0° <br />w <br />c <br />O 8 <br />I <br />i <br />U o <br />Q o <br />• <br />OCAD <br />M <br />w $ <br />w <br />cooS <br />ZZ <br />J <br />LJ_ <br />i_ <br />z a <br />> N <br />a <br />OU <br />wo <br />z0 <br />❑a <br />�0 <br />Un00 <br />ZO <br />04 <br />i <br />d '0w <br />o <br />¢o <br />it <br />wz <br />C/) <br />¢ <br />o U <br />h <br />mE <br />0 Z <br />Z r <br />Z <br />N J <br />7 m <br />Q W <br />E N <br />N <br />N <br />F <br />8¢ <br />ZZ <br />JO <br />W <br />Q 3 <br />U <br />�o <br />a <br />xw <br />x� <br />Np <br />� <br />3 <br />'o <br />J� <br />o� <br />O <br />a1 <br />V- <br />ila <br />3 <br />�M <br />� <br />>M <br />W <br />0 <br />,! <br />N <br />LO <br />O <br />CL <br />O <br />./ <br />mco <br />2 <br />A <br />i <br />O N <br />T <br />T O <br />•� <br />J N <br />T <br />TT <br />2 <br />T <br />LO <br />N <br />000 <br />L0 <br />O 04 <br />ili <br />E <br />> <br />c T <br />M <br />o <br />Z <br />m <br />Z <br />E O <br />`° <br />cc <br />Il <br />E <br />U � <br />Q <br />JOB <br />NO: <br />20-1126 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />