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RIDGE <br />ATTIC VENTILATION CALCULATIONS - 131 <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 />SE <br />(See lev) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />22.00000 <br />2.000000 <br />Floor <br />2002 <br />1922 <br />275 <br />961 <br />69 <br />480 <br />0 <br />606.0 <br />330.0 <br />276.0 <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"=V-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 SO, IN. OF NET FREE AREA / SQ. FT. <br />r= <br />ti 0�1 <br />CDV <br />zM <br />0 <br />— o <br />z N <br />z� <br />a <br />w <br />4-J <br />p <br />�V <br />— <br />O W <br />m <br />U <br />o� <br />m N <br />W <br />F <br />0 M <br />0) M <br />N -00 CO <br />U <br />UUUU <br />= m <br />US <br />O o N <br />0 <br />(1) <br />a)�LL00 <br />00 <br />¢ rn <br />o <br />N <br />Cv <br />v <br />M Q d <br />B D• <br />N� <br />N �O <br />U) C)M F ONO <br />U) <br />Z W MN�z z <br />F_ <br />= �LLo.g kj w <br />W Q v w <br />inW <br />V ' � _5 ° <br />Z N 0 4 o i o <br />LLZ <br />`I= � d <br />Q rn <br />W N¢M r� Q <br />a� V U <br />�� <br />V✓WVV:�r�SEN�,. <br />( <br />06 <br />- <br />r, <br />ia,,f,rtE�i;agea\ <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained within these <br />drawings comply <br />with the 2017 Florida Building Code - <br />Residential 6th <br />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 />L <br />4600 W. Cypress St, Suite 200 1 Tampa, FL 33607 <br />www.LennarTampa.com <br />oZ <br />0 <br />z <br />Z¢� <br />W Q cc W <br />0 <br />U <br />Z Q�C <br />U O LU w <br />/ <br />tt J <br />CL <br />C) <br />W N <br />rA' <br />U W <br />OLO <br />L <br />Ii <br />Z ZO <br />��/� <br />1..6 <br />� Z <br />a <br />n3 <br />C <br />-� <br />z <br />o <br />Q <br />O/ ' <br />J <br />QJ W <br />V <br />7 , <br />_J <br />W C <br />00O <br />Q <br />LL <br />Q U <br />J <br />O <br />EJOma2, <br />iz <br />Or00 <br />Z# <br />N <br />ZZ� <br />W C <br />¢ < cc <br />a <br />o-C)u- <br />z <br />z <br />0 - <br />C,P,Ci <br />g�8 <br />Q <br />z <br />z <br />'ay z <br />< ¢o <br />Z <br />m <br />Lr)z <br />W <br />N° <br />JZ <br />g <br />= <br />¢Lu <br />,--I <br />Q_ <br />U0 <br />o <br />SCALE : AS NOTED <br />DATE : <br />08/08/2019 <br />TECH: <br />FM <br />VERSION NO. 3al <br />SHEET NO. <br />5.0 <br />