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ATTIC VENTILATION <br />ATTIC VENTILATION <br />CALCULATIONS - B1 <br />REQUIRED UPPER VENTILATION <br />PROVIDED <br />1/150 <br />Rule <br />Ridge <br />1/300 Rule <br />Off -Ridge <br />(No Upper <br />Ventilators <br />(Must Provide Upper Ventilators) Vent Amt <br />Amt. <br />Req.) <br />(Ft.) <br />Total <br />Ventilation <br />ATTIC <br />Provided <br />SPACE <br />SQ. FT. <br />Total SQ. SQ. FT. SQ. IN. of <br />by Upper <br />SQ. IN. of <br />of vented <br />of ventilation to <br />IN. of I SQ. IN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />vented be provided <br />ventilation Ventilation <br />Ventilation <br />(See Elev) <br />required <br />needed <br />required soffit by upper <br />needed ventilators <br />Main <br />0.000000 <br />0.000000 <br />Floor <br />0 <br />0 <br />0 <br />0 0 0 <br />0.0 <br />__ <br />0.0 <br />(Zone 1) <br />0.0 <br />Upper <br />9 <br />2.000000 <br />Floor <br />(Zone 2) <br />1533 <br />1472 <br />210 <br />736 53 368 <br />135.0 <br />--- <br />276.0 <br />411.0 <br />' NOTE`" <br />GENERAL <br />CONTRACTOR <br />MUST ENSURE <br />THAT <br />PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS <br />AS <br />REQUIRED <br />BY FBC 6th <br />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-Resisitive Barriers. <br />Water-resisitive 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 (paperbacked <br />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 contructions 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 11150 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 SO. IN. OF NET FREE AREA / SQ. FT. <br />• O'HAGIN WEATHERMASTER (Shingle Roof) - 72 SO. IN. OF NET FREE AREA/ FT. <br />" (Sq. FL Soffit Needed) x 7 = (Sq. In. Needed) / 72 = Amount of O'Hagin Vents Needed <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. <br />-Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft. of Deck -Air Needed) <br />• O'HAGIN (Tile Roof) - 86.25 SQ. IN. OF NET FREE AREA / VENT <br />..Formula: (Sq. Ft. Soffit Needed) x 7 - (Sq. In. Needed) / 86.25 = Amount of O'Hagin Vents Needed <br />u7 <br />z�® <br />z�z <br />Q <br />J <br />I� z <br />C <br />t n CD <br />w <br />f'6 0 <br />Ow <br />t/1 <br />o 0 <br />mn <br />04 <br />U <br />W <br />' <br />~ 8 <br />M fh <br />C Cl) <br />0-0o <br />µ <br />LLm <br />BD <br />N�'. <br />LL J LU <br />LL <br />N,.. • ` <br />U z 8. -X <br />Q N . <br />W M <br />N <br />To the best of the Engineer's knowle ge, In ormation, and <br />belief, the structural plans and specifications contained <br />within these drawings comply with the 2017 Florida <br />Building Code - Residential 6th Edition. Engineer's <br />signature and seal is only for the structural engineering <br />portions of the drawing pages bearing Engineer's signature <br />and seal. <br />0 <br />z <br />0 N n <br />0-4 O <br />1,0 <br />> Oo <br />� M <br />M <br />�C to 'gyp Ln <br />f� ^ <br />0C U a <br />Q 00 <br />E <br />Z � fu <br />W <br />J � <br />5 <br />�0 <br />w 0 <br />F <br />�a <br />F <br />a- <br />�z0QO <br />z <br />Z z <br />w <br />�-2 <br />u u�!z <br />z <br />�z <br />`• <br />Grz <br />rou <br />fz <br />-v <br />N <br />ul <br />u.1 r) <br />•�, <br />o <br />> <br />V) <br />U <br />JLu <br />o <br />�"`►, <br />0 <br />r-4 <br />Ors <br />O <br />v <br />O� <br />CC <br />Q <br />Z <br />N <br />~VJ <br />W <br />t 4 <br />� <br />W <br />a w 0" <br />�C <br />L <br />FE <br />llllZ�{ v <br />ATI <br />'I\` <br />(iJ <br />W <br />r1lO <br />,--t <br />0- <br />1 U0 <br />SCALE : AS NOTED <br />DATE : 1 /5/2018 <br />TECH: MJAMES <br />VERSION NO. 10 <br />SHEET NO. <br />5.0 <br />