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1 �IIIII !11 I -- - 1. I � _ I � n u❑.. i , __... _ _ _ _ _ - _._ _. _ _. _ <br />ATTIC VENTILATION CALCULATIONS - B <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 <br />of vented <br />�, <br />IN. of <br />of <br />ventilation <br />SQ. IN. of <br />SQ, IN. of <br />Ventilators <br />ventilation <br />required <br />soffit <br />ventilation <br />vented <br />soffit <br />be providedd <br />by upper <br />Ventilation <br />Ventilation <br />(See ( SElev ) <br />needed <br />i <br />required <br />needed <br />ventilators <br />Main <br />23.0 <br />1.0 <br />Floor <br />2002 <br />1922 <br />275 <br />961 <br />69 <br />480 <br />483.0 <br />345.0 <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-B <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 ROOF <br />SLOPE REQUIREMENTS WITH TRUSS MANUFACTURER. <br />**ELECTRICAL SPECIFICATION NOTES** <br />ELECTRICAL CONTRACTOR MUST VERIFY WITH THE <br />SPECIFICATIONS FOR THE TYPE OF FIXTURE TO BE <br />USED. LIGHT FIXTURES SHOWN ARE FOR LOCATION <br />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 construction 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 />R703.12 Adhered masonry veneer installation <br />Adhered masonry veneer shall be installed in accordance with the <br />manufacturer's instructions. <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 <br />of the space to be ventilated. Upper ventilators shall be located no more than 3 <br />feet (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 />*If not enough vented soffit is provided due to fire protection, the contractor shall use tt <br />following approved vents: <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 />C9 "' <br />zm <br />—a <br />z� <br />V1 (D <br />C> <br />w <br />•V — <br />O w <br />m <br />o <br />U <br />m Il- <br />LLJ <br />1—CoCl) <br />_ <br />a> C0 <br />2-0 Cl) <br />= Q? <br />O o 0 <br />-a ii ao <br />C) <br />r`v <br />� 0 <br />O (a t: <br /><i rn <br />� Qa' <br />rn Q d <br />BD® <br />rc <br />N �O <br />V O O N <br />e W m z <br />s 6? <br />F.' °Q = ' <br />u- '_ <br />LU ¢ a <br />Z 10 <br />to W 1 <br />LL <br />,' U �'� •t <br />�' <br />LL <br />OF <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 6th 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 AR <br />4600 W. Cypress St, Suite 200 1 Tampa, FL 33607 <br />www.LennarTampa.com <br />oZ <br />0 <br />�o <br />za <br />fF <br />r <br />wz¢�� <br />� �00 <br />ZU� <br />� <br />=UpzZ <br />O W <br />O�0O <br />U <br />/ \ <br />U uJ N <br />V <br />Z <br />O <br />r U <br />f Z <br />O <br />g <br />z <br />—a <br />u <br />1170 <br />ouJ/ <br />¢ <br />J Q <br />J <br />L <br />M <br />�- <br />LU <br />0 <br />J., <br />O <br />O <br />U0wa <br />Oj <br />N <br />rr <br />zaZ� <br />WLa <br />QaLce <br />Q <br />o C� <br />z <br />Z <br />N <br />N <br />o <br />�PY2�j <br />W <br />J <br />Ln <br />W <br />Q <br />lLl <br />z¢o <br />z o <br />Nla-zu <br />O� <br />4* <br />Lr) <br />lMi <br />Z <br />o 0 <br />m <br />O <br />06 <br />z <br />_ <br />� 1A <br />¢g <br />rn <br />,-_`11 <br />a <br />cn <br />o <br />SCALE : AS NOTED <br />DATE : 3/7/2018 <br />TECH: JMUROSKI <br />VERSION NO. 10 <br />O <br />SHEET NO. <br />5.1 <br />