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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 />SO. IN. of <br />by Upper <br />SQ. IN. of <br />of vented <br />IN. of <br />of <br />ventilation to <br />SQIN. of <br />SQ. IN. of <br />Ventilators <br />ventilation <br />soffit <br />ventilation <br />vented <br />be provided <br />. <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 />21.00000 <br />2.000000 <br />Floor <br />2377 <br />2282 <br />326 <br />1141 <br />81 <br />570 <br />0 <br />591.0 <br />315.0 <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-Bl_ <br />SCALE: %4 = V-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 11300 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 SO. IN. OF NET FREE AREA / LINEAR FT. <br />• OFF -RIDGE VENTS 138 SO. IN. OF NET FREE AREA / UNIT <br />• SOFFIT VENTS 7 SQ. IN. OF NET FREE AREA / SO. FT. <br />u, <br />OWN <br />�aN QJ� .........,.• <br />F e <br />R Q F E S 51O <br />��N\N,N <br />foffuliltt��" <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. Engineer's signature and seal is only for <br />the structural engineering portions of the drawing pages bearing <br />Engineer's signature and seal. <br />E <br />v E <br />ccol <br />_m <br />0 0 0 O <br />_ m m <br />C4 J <br />®q C.N N C <br />®/ (D"'� <br />ON Il <br />:3 if <br />JAW <br />a. <br />rrll N M <br />Q .Q — <br />W to <br />Z O <br />c 05 v <br />M a;0_ <br />x H <br />m 0 <br />m <br />W .@ Or-m <br />W 2 E c� m <br />�mp <br />Q 4 <br />Jon' <br />Z fO N 0 <br />NQMZ <br />0 0 <br />0 0 <br />z °d <br />C) J <br />❑00 <br />W <br />2 N 0 <br />m O <br />� N <br />O <br />v <br />vP M <br />� n <br />[�1 <br />z C <br />iry O <br />yjU_ <br />C1 <br />Y <br />LU <br />W O <br />® <br />Q <br />L_U H <br />to o <br />c <br />w <br />2 <br />0 <br />Rig 8 <br />I <br />z <br />GJ 0 <br />LO <br />to Y <br />® 0 <br />O <br />� <br />J <br />w <br />co <br />z <br />O <br />Z <br />Z <br />� <br />L L <br />Z a <br />OO <br />Z o <br />¢N <br />fl- ® <br />Z® <br />10 O= O <br />Ico <br />O E <br />OQ <br />az <br />O� <br />az <br />N ro <br />w. <br />�w <br />(� C <br />0 Y <br />U <br />.9 <br />01, <br />Z <br />0) <br />J <br />¢°0 <br />a z <br />�z <br />d� <br />Cl) �' <br />g z <br />�W <br />T <br />U <br />¢ <br />ao <br />t <br />�� <br />w <br />=r <br />C7 <br />Cfl <br />'ct <br />z ¢ <br />a <br />OU ?i <br />L <br />m <br />> <br />cc <br />0 <br />00 <br />c <br />`° <br />N <br />_ <br />Q <br />C <br />O <br />CL <br />U CA <br />^' <br />C <br />r <br />70 -0 p <br />0') <br />.� 04 <br />Z <br />r <br />00 O N <br />r <br />o <br />Z <br />Z3 <br />E O 0 <br />c <br />E a? <br />U J Q cc <br />J <br />JOB <br />NO: 20-2747 <br />SCALE : AS NOTED <br />SHEET NO. <br />5 <br />