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ATTIC VENTILATION CALCULATIONS - B1 ATTIC VENTILATION REQUIRED UPPER VENTILATION PROVIDED 1/150 Rule 1/300 Rule Ridge Off -Ridge (No Upper Ventilators (Must Provide Upper Ventilators) Vent Amt Amt. Req.) (Ft.) Total Ventilation ATTIC Provided SPACE SQ. FT. Total SQ. SQ. FT. SQ. IN, of by Upper SQ. IN. of of vented IN. of of ventilation to SQ. IN. of SQ. IN. of Ventilators ventilation soffit ventilation vented be provided Ventilation Ventilation (See Elev ) required needed required soffit by upper needed ventilators Main 21.00000 2.000000 Floor 2377 2282 326 1141 81 570 0 591.0 315.0 276.0 (Zone 1) **NOTE* GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS REQUIRED BY FBC 6th ED. RESIDENTIAL. ROOF PLAN SCALE: %4'=V-0" General Notes ROOF CRITERIA: • 12" OVERHANG U.N.O. • PLUMB CUT FASCIA ROOF • PITCH PER ELEVATION **G.C. VERIFY ROOF PITCH** ROOF PITCH VARIES PER SUBDIVISIONS IT IS THE CONTRACTORS RESPONSIBILITY TO VERIFY ROOF SLOPE REQUIREMENTS WITH TRUSS MANUFACTURER. **ELECTRICAL SPECIFICATION NOTES** ELECTRICAL CONTRACTOR MUST VERIFY WITH THE SPECIFICATIONS FOR THE TYPE OF FIXTURE TO BE USED. LIGHT FIXTURES SHOWN ARE FOR LOCATION PURPOSES. Exterior Covering R703.7 Exterior plaster. Installation of these materials shall be in compliance with ASTM C 926 and ASTM C 1063. R703.7.1 Lath. All Lath and lath attachments shall be of corrosion -resistant materials. Attached per ASTM C 1063. R703.7.2 Plaster. Plastering w/ portland cement plaster shall be not less than three coats when applied over metal lath or wire lath and shall be not less than two coats when applied over masonry, concrete. R703.7.3 Water-Resisitive Barriers. Water-resisitive barriers shall be installed where cement plaster (stucco) is to be applied over wood -based sheathing, shall include a water -resistive vapor -permeable barrier. The individual layers shall be installed independently such that each layer provides a separate continuous plane and any flashing intended to drain to the water -resistive barrier is directed between the layers. The barriers shall consist of one of the following. 1. Two layers of an approved water resistant barrier material in accordance with R703.2. 2. One layer of an approved water -resistive barrier (paperbacked stucco lath) over an approved synthetic house wrap. R703.4 Flashing. Approved corrosion -resistant flashing shall be applied shingle -fashion in a manner to prevent entry of water into the wall cavity or penetration of water to the building structural framing components. Flashing shall be installed at the following locations. • Exterior window/door openings. • Intersection of chimneys or other masonry contructions with frame walls. • Under and at the ends of masonry, wood or metal copings and sills. • Continuously above all projecting wood trim. • Where exterior porches, decks or stairs attach to a wall or floor assembly of wood -frame construction. • At wall and roof intersections • At Built-in gutters. Attic Ventilation Attic Ventilation to be in compliance with the Florida Building Code 6th Edition (2017) Residential R806. The Minimum net free ventilating area shall be 1/150 of the area of the vented space. The ventilating area may be reduced to 1/300 provided that at least 40% but no more than 50% of the required ventilation is provided in the upper portion of the space to be ventilated. Upper ventilators shall be located no more than 3 feet (measured vertically) below the ridge or highest point of the space, with the balance of the required ventilation provided by eave or cornice vents. **CALCULATIONS BASED ON THE FOLLOWING VALUES, SEE ROOF PLAN** (Values to be verified with Manufacturer Specifications) • RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. • OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA I UNIT • SOFFIT VENTS 7 SO. IN. OF NET FREE AREA / SQ. FT, • O'HAGIN WEATHERMASTER (Shingle Roof) - 72 SQ. IN. OF NET FREE AREA/ FT. *" (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 72 = Amount of O'Hagin Vents Needed • LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. **Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft. of Deck -Air Needed) • O'HAGIN (Tile Roof) - 86.25 SQ. IN. OF NET FREE AREA / VENT **Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 86.25 = Amount of O'Hagin Vents Needed La 0V z M a z� Q J dv z U)V) Q w a--+ LU O F_ N to o 0 '— Co 04 04 U Lij t— E O a� M C N CO m -o Q `4 U S dj O o L LL co N � fl o O Y Q rn to V M ¢ d Al MID®,'��fi/ I NCB�D �C / g vuvv -,{A�9�4 • � O ♦ CO ID LA73 W ul IIIIIIIIII�II� O � 0 UM V /gyp O �,W To the best of the Engineer's kr�AkfeVJ9,7information, and belief, the structural plans and specifications contained within these drawings comply with the 2017 Florida Building Code - Residential 6th Edition. Engineer's signature and seal is only for the structural engineering portions of the drawing pages bearing Engineer's signature and seal. 0 0 z (V O n o r>i M O M Q(n-0Lr) a tn•��t LL ss ^ U a l000 � z WUJ J � Oz O w� zaa f a r~ u Q ix UZOp Z ZQ L) 2 f W U N WOO Z0 Z Fz Oro 1� a M > C 0 U U-) — J CL �W o9 0 1, O �Rzo x �5 .;-. `; O U a m a oaoa N ` U Q Q Q O X C) ��Q WzJ Ln rl LL �90,u- ? a =,,ozU c G Q W U 2 he W ^ L / Ln z z a z Cy nZ z m rn Q J = Qo ,-+ 0- cn SCALE : AS NOTED DATE : 1 /4/2018 TECH: ERAN D VERSION NO. 10 SHEET NO. 5.0