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ATTIC VENTILATION CALCULATIONS - B <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />(No Upper Ventilators <br />1/300 Rule <br />Ridge <br />Vent Amt <br />Off -Rid <br />Req.) <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />Amt. <br />_--------• <br />--- <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 />( ) <br />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />23.0 <br />1.0 <br />Floor <br />2719 <br />2610 <br />373 <br />1305 <br />93 <br />653 <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 />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 />NS FOR THE <br />OF <br />IXTURE TO BE <br />_0USED. LIGHT OF XT FIXTURES SHOWN ARE REFFOR LOCATION <br />PURPOSES. <br />4 Exterior Covering <br />INS iiiiiiiiiiiiiii <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 />ZONE-1 R703.7.2 Plaster. <br />Plastering w/ portland cement plaster shall be not less than three <br />ATTIC SPA ' ' E n. ' ' • . • • . • .... coats when applied over metal lath or wire lath and shall be not <br />O less than two coats when applied over masonry, concrete. <br />J <br />N R703.7.3 Water-Resisitive Barriers. <br />1128 S Q . Ft `n 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 />1�Q 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 />4'-•'ROOF VENT • • • • • • • • • • • • • • • • • . • � � • shingle -fashion in a manner to prevent entry of water into the wall <br />:12� SLOPE 5:12 SLOPE, 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 />I • • • • • ♦ •• I•,•.•••.,.•,••„N•,• ,• r ,• ,• M M .• ,. . • , • and sills. <br />• Continuously above all projecting wood trim. <br />._0 O ; ; 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 />o ti6o � .j�Q • At Built-in gutters. <br />$�QP t? :12 SLOPE <br />........................................................................ R703.12 Adhered masonry veneer installation <br />Ly Q,y Adhered masonry veneer shall be installed in accordance with the <br />manufacturer's instructions. <br />LU <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 />;::::::::: 71 1E-2 space. The ventilating area may be reduced to 1/300 provided that at least 40% <br />�■'■ 1:� 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 />W ATTIC SPACE:: �Q feet (measured vertically) below the ridge or highest point of the space, with the <br />d1` balance of the required ventilation provided by eave or cornice vents. <br />OJ "CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN" <br />rn 14 2 2 S (Values to be verified with Manufacturer Specifications) <br />P ; ; Q • • RIDGE VENTS 15 SO. IN. OF NET FREE AREA / LINEAR FT. <br />C • OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />E75z <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT. <br />o ; ; ; W 5:12 SLOPE "If not enough vented soffit is provided due to fire protection, the contractor shall use the <br />RIDGE ........... > �� <br />following approved vents: <br />Q • • • • • • • • • • • • • LOMANCO DECK -AIR (Shingle Roof) - 9 SO. IN. OF NET FREE AREA / FT. <br />-Formula: (Sq. Ft. Soffit Needed) x 7 - (Sq. In. Needed) 19 m Linear Ft. of Deck -Air Needed) <br />17'-0' RIDGE VENT � <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 />04 <br />. •cn <br />0 f. P z ; • 1- �n <br />...........•. ............. <br />z <br />W 5:12 SLOPE <br />................ W <br />o <br />60 <br />00 <br />p■.— ■r_ ...— ra ..— ...r. ' ...r....r. it .r_ r_ .r_ ■..r. ■■■r..>_ .sue .r_ .■■r..att�. fir_ .r_ .r_ +l.r...w• .r_ ra <br />c.......... �A <br />W <br />I 5:12 SLOP <br />EE z <br />Lu <br />5:12 SLOPE, <br />......... ......... c <br />w <br />a <br />2'-0" y�'o <br />a <br />a <br />Go <br />N <br />0 <br />O <br />W <br />ROOF PLAN - ELEV-B <br />33 SCALE: %4'=11-0" <br />Z <br />z <br />z <br />a <br />Cl <br />Q) <br />C, <br />w <br />"V — <br />Ow <br />ZD <br />� <br />U <br />M <br />m N <br />■ ~ <br />= <br />p � cv <br />Q <br />Al <br />1� <br />N N <br />� h N <br />s <br />z z <br />LU <br />W.E�if <br />IW7l.O .F M U�iiW•• <br />Lwu <br />O Q <br />i• FLU <br />"e%/�14 ; <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 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 200 1 Tampa, FL 33607 <br />www.LennarTampa.com <br />W Q' <br />U H 0 <br />11 <br />NR�z <br />i� <br />00 <br />o �o <br />/1 <br />r.i. <br />�z <br />fqq z <br />Z <br />_0 <br />\� <br />N <br />> <br />V <br />z <br />:3 LU <br />V <br />U) <br />N <br />iCL <br />L <br />e)Ro <br />M <br />U_ <br />igS <br />0 <br />bow <br />Ln <br />$ <br />2 <br />IN <br />Ln <br />� <br />J <br />T -I <br />tii <br />LU <br />� <br />z <br />~� <br />F <br />Z <br />Z8 <br />t <br />� <br />�- <br />r <br />06 <br />Z <br />g <br />LI J <br />= <br />a W <br />f <br />.-+ <br />a <br />to <br />s <br />SCALE : AS NOTED <br />DATE : 6/20/2018 <br />TECH: MJAMES <br />VERSION NO. 4 . 1 <br />SHEET NO. <br />5.1 <br />