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I ATTIC VENTILATION CALCULATIONS - Al (TRA) II <br />I ATTIC VENTILATION REQUIRED I UPPER VENTILATION PROVIDED I <br />ATTIC <br />SPACE <br />Main <br />Floor 2373 <br />(Zone 1) <br />1/150 Rule 1/300 Rule <br />(No Upper Ventilators (Must Provide Upper Ventilators) <br />Req.) <br />SQ. FT. <br />Total SO. <br />SQ. FT. <br />SQ. IN. of <br />SQ. IN. of <br />of vented <br />IN. of <br />of <br />ventilation to <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />2278 1 325 1 1139 1 81 1 570 <br />Ridge <br />Vent Amt Off -Ridge <br />(Ft.) Amt. <br />General Notes <br />ROOF CRITERIA: <br />• 12" OVERHANG U.N.O. <br />• PLUMB CUT FASCIA ROOF <br />• PITCH PER ELEVATION <br />Total <br />**G.C. VERIFY ROOF PITCH** <br />Ventilation <br />Provided <br />ROOF PITCH VARIES PER SUBDIVISIONS IT IS THE <br />by Upper <br />11 <br />CONTRACTORS RESPONSIBILITY TO VERIFY <br />SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ROOF SLOPE REQUIREMENTS WITH TRUSS <br />Ventilation <br />Ventilation <br />(See Elev) <br />MANUFACTURER. <br />**ELECTRICAL SPECIFICATION NOTES** <br />ELECTRICAL CONTRACTOR MUST VERIFY WITH <br />29.00000 1.000000 THE SPECIFICATIONS FOR THE TYPE OF FIXTURE <br />0 573.0 TO BE USED. LIGHT FIXTURES SHOWN ARE FOR <br />435.0 138.0 1 1 LOCATION PURPOSES. <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-Al <br />SCALE: Y4'=1'-0" <br />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 />I Attic Ventilation II <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 11300 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 save 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 />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 />t .. <br />a <br />NO <br />WN <br />• :: <br />r • 0 <br />4 <br />.r �P� \ <br />e '• F LO 40 <br />'?OF E S,Q� `,1�,�1r� <br />ei T S <br />�f/ff111111111\`�\ <br />To the best of the Engineers knowledge, Information and belief, <br />the structural plans and specifications contained within these <br />drawings comply with the 2017 Florida Building Code - <br />Residential 8th Edition. 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