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ATTIC VENTILATION CALCULATIONS - Al <br />ATTIC VENTILATION REQUIRED <br />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 />Total SQ. <br />SQ. FT. <br />SQ. IN. of <br />by Upper <br />SQ. IN. of of vented <br />IN. of <br />of <br />ventilation to <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />Ventilation <br />Ventilation <br />( See Elev) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />4,000000 <br />2.000000 <br />Floor <br />1080 <br />1037 <br />148 <br />518 <br />37 <br />259 <br />336.0 <br />60.0 <br />276.0 <br />(Zone 1) <br />Main <br />0.0 <br />0.000000 <br />Floor <br />16 <br />15 <br />2 <br />8 <br />1 <br />4 <br />0.0 <br />0.0 <br />(Zone 2) <br />0.0 <br />Upper <br />16.000000 <br />0,000000 <br />Floor <br />1166 <br />1119 <br />160 <br />560 <br />40 <br />280 <br />240.0 <br />(Zone 3) <br />240.0 <br />0.0 <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 <br />SCALE: %4'=1'-0" <br />General Notes <br />ROOF CRITERIA: <br />• 12" OVERHANG U.N.O. <br />• PLUMB CUT FASCIA ROOF <br />• PITCH PER ELEVATION <br />**G.C. VERIFY ROOF PITCH** <br />ROOF PITCH VARIES PER SUBDIVISIONS IT IS THE <br />CONTRACTORS RESPONSIBILITY TO VERIFY <br />ROOF SLOPE REQUIREMENTS WITH TRUSS <br />MANUFACTURER. <br />**ELECTRICAL SPECIFICATION NOTES** <br />ELECTRICAL CONTRACTOR MUST VERIFY WITH <br />THE SPECIFICATIONS FOR THE TYPE OF FIXTURE <br />TO BE USED. LIGHT FIXTURES SHOWN ARE FOR <br />LOCATION PURPOSES. <br />Exterior Covering <br />R703.7 Exterior plaster. <br />Installation of these materials shall be in compliance with ASTM C <br />926 and ASTM C 1063. <br />R703.7.1 Lath. <br />All Lath and lath attachments shall be of corrosion -resistant <br />materials. Attached per ASTM C 1063. <br />R703.7.2 Plaster. <br />Plastering w/ portland cement plaster shall be not less than three <br />coats when applied over metal lath or wire lath and shall be not <br />less than two coats when applied over masonry, concrete. <br />R703.7.3 Water -Resistive Barriers. <br />Water -resistive barriers shall be installed where cement plaster <br />(stucco) is to be applied over wood -based sheathing, shall include <br />a water -resistive vapor -permeable barrier. The individual layers <br />shall be installed independently such that each layer provides a <br />separate continuous plane and any flashing intended to drain to <br />the water -resistive barrier is directed between the layers. The <br />barriers shall consist of one of the following. <br />1. Two layers of an approved water resistant barrier material in <br />accordance with R703.2. <br />2. One layer of an approved water -resistive barrier (paper <br />backed stucco lath) over an approved synthetic house wrap. <br />R703.4 Flashing. <br />Approved corrosion -resistant flashing shall be applied <br />shingle -fashion in a manner to prevent entry of water into the wall <br />cavity or penetration of water to the building structural framing <br />components, Flashing shall be installed at the following locations. <br />• Exterior window/door openings. <br />• Intersection of chimneys or other masonry constructions with <br />frame walls. <br />• Under and at the ends of masonry, wood or metal copings <br />and sills. <br />• Continuously above all projecting wood trim. <br />• Where exterior porches, decks or stairs attach to a wall or <br />floor assembly of wood -frame construction. <br />• At wall and roof intersections <br />• At Built-in gutters. <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 SO. 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 />0 <br />OI <br />Lai <br />Z M <br />_ <br />Z cC)COy <br />z <br />0") z <br /><n <br />w <br />�U — <br />O w <br />o <br />�� <br />M v <br />m9ti <br />N <br />~ 8 <br />N faa M <br />'O <br />/= <br />N <br />O <br />2 V— <br />�C <br />¢ o, <br />OHO <br />O Y 1� <br />rn¢ d <br />s ID <br />N-C•H D C <br />T.? <br />e <br />Y�O O N <br />d o d <br />Z W �mco z <br />U) �r <br />Im w <br />701414141 <br />ame <br />4 O tF <br />i <br />•. <br />Q O U �y5W <br />—° )VV.WW.irD;S <br />FLU • <br />\. <br />,D <br />��`�flF . .. to <br />\ <br />W01(ift 110% i. <br />0 <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 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 />Engineer's signature and seal. <br />LENNAR <br />4600 W. Cypress St, Suite 200 ( Tampa, FL 33607 <br />www.LennarTampa.com <br />oz <br />�Q <br />za <br />h <br />t ¢ <br />r480 <br />z Q in <br />v <br />Y J <br />y� <br />p W Com <br />OK <br />W N <br />LU <br />1011, <br />L <br />Z O <br />Z <br />Ln 3: <br />O <br />) <br />¢ <br />J W <br />U <br />=00 <br />---� <br />Q_ <br />ooz <br />o <br />N <br />,.L <br />�Yr <br />I on <br />0 <br />O <br />I~IH <br />�Qa <br />N <br />A <br />z<lz; <br />Z¢ <br />Lu <br />Q <br />o <br />Z <br />5 zo <br />J <br />I.I. <br />U <br />M <br />Q <br />z <br />LU <br />a¢o <br />Z <br />Z <br />y�j <br />�o� <br />min <br />O <br />2 <br />�UJ <br />rn <br />r-+ <br />a <br />V) <br />o <br />SCALE : AS <br />NOTED <br />DATE : 7/29/2019 <br />TECH: SCASEY <br />VERSION No' 10 <br />0 <br />SHEET NO. <br />5.0 <br />