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ATTIC VENTILATION CALCULATIONS - B1 (TRB) <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 />22.00000 <br />2.000000 <br />Floor <br />1999 <br />1919 <br />274 <br />960 <br />69 <br />480 <br />0 <br />606.0 <br />330.0 <br />276.0 <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 />ROOF PLAN - ELEV-B1 <br />SCALE: %4'=1'-0" <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 />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 />• RIDGE VENTS 15 SQ. IN. OF NET FREE AREA / LINEAR FT. <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 />w,o.e ',g0 w/v <br />r <br />t s• tJ p4 �Ca <br />N <br />CIT <br />f <br />r <br />t.L <br />gp <br />3 j ¢ ��i�':�t4 <br />To the best of the Engineer's knowledge, information and belief, <br />the structural plans and specifications contained <br />within these <br />drawings comply with the 2017 Florida Building Code - <br />Residential 6th Edition. Engineers signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineers signature and seal. <br />PA <br />F � E <br />O <br />N 0 Co <br />CO <br />SEEELM ANqi.i N N m <br />Wry N <br />-O <br />LL <br />J ik W <br />iA U) r <br />LL J p- <br />L- <br />i eJ M M <br />@ LL LL <br />U <br />W LU <br />a a X <br />Z 6 c <br />0 0 <br />w N N co <br />7M <br />0:m OJ <br />J 0 <br />d <br />Mill Z N M Z <br />U <br />cn <br />V8 <br />00 <br />J <br />Z <br />❑�❑ <br />W <br />v M � <br />O <br />O O <br />p a <br />CL <br />-- N <br />M <br />, M1� <br />V O <br />tL <br />0 <br />- <br />W N <br />0 Lu $ <br />Ln C4 <br />Ln <br />Cn <br />wa <br />r— <br />4J <br />L.0 � <br />s — E <br />C rn <br />0 <br />Q 10 N 0 <br />O <br />co <br />w <br />M <br />¢ <br />zo <br />Z <br />z <br />U- <br />ctf <br />Zij <br />- <br />g <br />TN <br />ZB <br />Q ® <br />E U <br />¢z <br />° <br />ira <br />00 <br />U <br />Oq <br />AV O <br />E°d <br />O � <br />0 <br />z <br />U Z <br />� <br />ro <br />C%� <br />z <br />y <br />U <br />o <br />O <br />Z <br />Qi <br />J <br />Nm <br />°� <br />Q W <br />�z <br />CA 3 <br />a� <br />°9 <br />�o <br />az <br />�W <br />oLL <br />z <br />�3 <br />T <br />O <br />Mj <br />a00 <br />it <br />ZIw <br />a <br />U <br />C <br />O <br />cy) <br />�1 <br />0I <br />L6 <br />0 <br />> <br />O <br />CL <br />C <br />C.0 <br />1_ <br />CO <br />O N <br />0 <br />r <br />L0 <br />(.Ci <br />�+ N <br />J � <br />r <br />Ln <br />r <br />T 00 (C)eo) � <br />r <br />.. <br />ca <br />w N <br />o <br />z <br />E 0 <br />a. <br />E :3 <br />0 -j Q o <br />c <br />JOB <br />NO: 20-4940 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />