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ATTIC VENTILATION CALCULATIONS - Al TRA <br />ATTIC VENTILATION REQUIRED I UPPER VENTILATION PROVIDED <br />1/150 Rule <br />300 Rule <br />Ridge <br />Off - Ridge <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />e Upp <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 />SO. IN. of <br />by Upper <br />SO. IN. of 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 />L <br />in 29 1or 2373 2278 325 1139 81 570573.0 <br />e 1) 435.0 138.0 <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 />ROOF PLAN — ELEV—Al <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 save or comics 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 vends: <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SO. IN. OF NET FREE AREA / FT. <br />"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. in. Needed) / 9 = Linear Ft. of Deck-Alr Needed) <br />`{{{11111111j11 CN <br />�% >rE W KO <br />P• ..... <br />�. • <br />��` '�� � N S F •.s'�i �'i o <br />trio .. <br />' S <br />%� 47 <br />4 <br />� <br />4�}. <br />® �� 0 1 <br />»» <br />4*1241182 <br />Blips <br />To the beat of the nginsers knowledge, Information and belief. <br />the structural plans and specifications contained within these <br />drawings comply with the 2020 Florida Building Code - <br />Resldentlel 7th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />LL <br />:1cri <br />LL4 X <br />Z <br />W4 0� <br />O <br />W�w� <br />m O <br />pjO' <a <br />Z <br />ILW <br />M Z Lo p <br />OU�y <br />= <br />W <br />00❑ <br />V <br />z <br />z <br />a g <br />J <br />d <br />-J <br />N <br />Z ff ll <br />N <br />ty <br />"U <br />QQ <br />W <br />O <br />�V) <br />C <br />C) <br />— • <br />Q <br />M <br />W <br />z <br />U_ <br />E� <br />a ff <br />Zo <br />Zoe <br />z <br />i <br />W <br />8z <br />J <br />�L <br />iU <br />sa <br />CO <br />0 <br />' <br />J <br />CN <br />O <br />a <br />s <br />U <br />Cfl <br />rn <br />• <br />T <br />(� CD, <br />oo <br />o <br />:= <br />4 �M <br />N <br />a <br />o <br />Z <br />E <br />0 <br />Q <br />e <br />� <br />J <br />p <br />JOB <br />NO: <br />21-2027 <br />SCALE : <br />AS NOTED <br />SHEET NO. <br />5 <br />