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0 <br />0 <br />W <br />17 <br />ATTIC VENTILATION CALCULATIONS - 131 <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 />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 />required <br />needed <br />required <br />soffit <br />by upper <br />needed <br />ventilators <br />Main <br />0.0 <br />0.0 <br />Floor <br />4 <br />4 <br />1 <br />2 <br />0 <br />1 <br />0.0 <br />0.0 <br />0.0 <br />(Zone 1) <br />Upper <br />4.0 <br />2.0 <br />Floor <br />1080 <br />1037 <br />148 <br />518 <br />37 <br />259 <br />336.0 <br />(Zone 2) <br />60.0 <br />276.0 <br />Upper <br />20.0 <br />0.0 <br />Floor <br />1172 <br />1125 <br />161 <br />563 <br />40 <br />281 <br />300,0 <br />0.0 <br />(Zone 3) <br />I300.0 <br />**NOTES' <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FLORIDA BUILDING CODE 7TH EDITION (2020) RESIDENTIAL. <br />ZONE-1 <br />ATTIC SPACE <br />4 SQ. FT. <br />ROOF PLAN - ELEV-Bl <br />SCALE: Y4'=1'-0" <br />Attic Ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 7th Edition <br />(2020) 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 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 />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SQ. FT. <br />• STUCCO SOFFIT VENTS - 126 SQ. IN. OF NET FREE AREA / SQ. FT. <br />*If not enough vented soffit is provided due to fire protection, the contractor shall use the <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 = (S% In. Needed) 19 = Linear Ft. of Deck -Air Needed) <br />G <br />;o y <br />J <br />W <br />�4 N L <br />cp <br />CQ <br />y csr � <br />cc d CO W <br />c E <br />5 <br />o- >r <br />,p <br />CA <br />�. <br />m s <br />0g'.��? <br />.� <br />��,/,*, '�' ^rA fie•'• ..��.++• 042 <br />.sff/f�1Rr3tgF,WxnS?,'aW. <br />To the best of the Engineer's knowledge, information and belief, <br />the structural <br />plans and specifications contained within these <br />drawings comply with the 2020 <br />Florida Building Code - <br />Residential <br />7th Edition. 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