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m <br />M <br />2 <br />CV <br />u7 <br />rn <br />in <br />O <br />0 <br />0 <br />�Jp <br />O <br />N <br />x <br />m <br />2 <br />CV <br />N <br />s <br />ATTIC VENTILATION CALCULATIONS - 131 <br />ATTIC VENTILATION REQUIRED UPPER VENTILATION PROVIDED <br />1/150 Rule Ridge <br />1/300 Rule Off -Ridge <br />(No Upper' Ventilators (Must Provide Upper Ventilators) Vent Amt Amt. <br />R6q.) (Ft.) <br />ATTIC <br />SPACE <br />SQ. IN. of <br />SQ. FT. <br />Total SQ. <br />SQ.T <br />ventilation <br />of vented <br />IN. of <br />vented <br />required <br />soffit <br />ventilation <br />soffit <br />needed <br />required <br />needed <br />- - Total <br />Ventilation <br />Provided <br />SQ. IN. of by Upper <br />ventilation to SQ. IN. of SQ. IN. of Ventilators <br />be provided Ventilation Ventilation (See Elev) <br />by upper <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 />20.0 <br />276.0 <br />0.0 <br />Upper <br />Floor <br />1172 <br />1125 <br />161 <br />563 <br />40 <br />281 <br />300.0 <br />300.0 <br />0.0 <br />(Zone 3) <br />**NOTE** <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: %4'=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 SO. 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 = (Sq. In. Needed) / 9 = Linear Ft. of Deck -Air Needed) <br />N <br />ci r= <br />o <br />F •a <br />d <br />> w <br />O t O <br />U do O <br />C /0 C- M <br />N <br />co <br />LA_ <br />N C I.L 4 <br />M o <br />3= dY <br />d <br />a> a.= <br />6 � <br />to W <br />a c m <br />N 4� <br />d <br />""�i:� t1itYYi <br />At <br />~r �+x <br />fit✓ <br />..,....•b <br />.r rt _ <br />fit• <br />e <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 2020 Florida Building Code - <br />Residential <br />7th Edition. 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