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ATTIC VENTILATION CALCULATIONS - Al <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />11150 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 <br />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 />29.00000 <br />1.000000 <br />Floor <br />2373 <br />2278 <br />325 <br />1139 <br />81 <br />570 <br />0 <br />573.0 <br />435.0 <br />138.0 <br />(Zone 1) <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 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 />In - <br />o <br />U� <br />z_M <br />CD <br />z�z <br />zc <br />cn c� <br />C <br />W <br />M p <br />•V — <br />O W <br />Ln <br />12 <br />F- <br />s <br />�Ln <br />m N <br />W <br />oE <br />-- U <br />N ch <br />to CO <br />N -0 <br />_ <br />O 'a N <br />C)"_ <br />00 <br />oD <br />C 0 <br />Q� <br />o 0 <br />�Qv <br />rn Q o <br />B ®® <br />NN C <br />i� <br />N ,D <br />D h N <br />O <br />W <br />Z gMo�oz z° <br />W <br />LU <br />Z <br />10 cQo �i <br />�- <br />cz <br />W >a-g••••� <br />_C) H <br />DSENG. \N <br />WWW.FUJ <br />e" <br />UJ <br />•.•� 6 <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 <br />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 2001 Tampa, FL 33607 <br />www.LennarTampa.com <br />Oz <br />3� <br />uJ <br />za <br />�F <br />�z00 <br />L <br />o w <br />G W U_ <br />^ <br />F <br />OuJ <br />z <br />r/Q/�■■ <br />z <br />z <br />C: <br />N <br />-D <br />J <br />a <br />W <br />U <br />Ch <br />1� <br />Li <br />K O KO O <br />QUA <br />0 <br />o <br />�o <br />Ir <br />z aZa <br />wQI- Q <br />LZU <br />O <br />aW< <br />Z <br />z <br />a! <br />J <br />Lr) <br />l <br />Q <br />z <br />OQ <br />o <br />O <br />�¢z <br />lD <br />Z <br />o, o 0 <br />m <br />r <br />Z <br />W <br />J2 <br />�W <br />� <br />2 <br />,-I <br />a <br />to <br />o <br />SCALE : AS NOTED <br />DATE : 07/08/2019 <br />TECH: FM <br />VERSION No' 4n0 <br />SHEET NO. <br />5.0 <br />