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VENTED SOFFIT 48 SQ. FT. <br />Anic ventilation <br />Attic Ventilation to be in compliance with the Florida Building Code 5th Edition <br />(2014) 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 Q S . IN. OF NET FREE AREA /LINEAR FT. <br />• OFF -RIDGE VENTS 138 SQ. IN. OF NET FREE AREA / UNIT <br />•SOFFIT VENTS 7SQ. IN. OFNET FREE AREA /SQ. FT. <br />••••••••••'•% ......•••••• ••••••••••••••••• <br />'• <br />• O'HAGIN WEATHERMASTER (Shingle Roof) - 72 SQ. IN. OF NET FREE AREA/ FT. <br />��• • • <br />** (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 72 = Amount of O'Hagin Vents Needed <br />:.J <br />JJ77 <br />• LOMANCO DECK -AIR (Shingle Roof) - 9 SQ. IN. OF NET FREE AREA / FT. <br />�� �. <br />**Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 9 = Linear Ft. of Deck -Air Needed) <br />... <br />• O'HAGIN (Tile Roof) - 86.25 SQ. IN. OF NET FREE AREA / VENT <br />•:: <br />•:: <br />I' <br />"Formula: (Sq. Ft. Soffit Needed) x 7 = (Sq. In. Needed) / 86.25 = Amount of O'Hagin Vents Needed <br />ZONE-3 <br />ATTIC SPACE <br />.:� <br />j <br />3366 SQ. FT. <br />... <br />• <br />0 <br />'•�LL- <br />c) <br />:.� <br />.. <br />�•• <br />.'� <br />. <br />. <br />..� <br />�.� <br />�.. <br />��. <br />: <br />L~L- <br />��. <br />•.� <br />i <br />� <br />� <br />i <br />o <br />Q <br />�.. <br />•.� <br />LU <br />~ <br />�• <br />�:......... <br />.:•� <br />a <br />. s'e-r. rrr. rrr. rrr. rrr. ssr. rer. <br />rrr. <br />2 <br />.................................................................................. .. <br />VENTED SOFFIT 36 SQ. FT. <br />............................................................... <br />VENTED SOFFIT 20 SQ. FT. <br />ROOF PLAN-B_ <br />SCALE: %4"=V-0" <br />ATTIC VENTILATION CALCULATIONS - B <br />ATTIC VENTILATION REQUIRED <br />UPPER VENTILATION PROVIDED <br />1/150 Rule <br />1/300 Rule <br />RidgeVeniAmt <br />(No Upper Ventilators <br />(Must Provide Upper Ventilators) <br />(Ft.) <br />Off -Ridge Amt. <br />Req.) <br />Total Ventilation <br />ATTIC <br />Provided by <br />SPACE <br />SQ. FT. <br />Total SQ. <br />SQ. FT. <br />SQ. IN. of <br />Upper <br />Ventilators <br />SQ. IN. of <br />ventilation <br />of vented <br />IN. of <br />of <br />vented <br />ventilation to <br />be provided <br />SQ. IN. of <br />S0. IN. of <br />(See Elev) <br />required <br />soffit <br />ventilation <br />soffit <br />by upper <br />Ventilation <br />Ventilation <br />needed <br />required <br />needed <br />ventilators <br />Main <br />14.0 <br />5.0 <br />Floor <br />3366 <br />3231 <br />462 <br />1616 <br />115 <br />808 <br />900.0 <br />210.0 <br />690.0 <br />(Zone 3) <br />0.0 <br />0.0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0r0 <br />o.o <br />o.o <br />0.0 <br />0.0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0.0 <br />0.0 <br />0.0 <br />**NOTE** <br />GENERAL CONTRACTOR MUST ENSURE THAT PROPER VENTILATION IS PROVIDED AT EAVES/SOFFITS AS <br />REQUIRED BY FBC 5th ED. RESIDENTIAL. <br />VENTED SOFFIT LEGEND <br />IF SOFFIT IS LABELED AS "NON -VENTING" FIRE PROTECTION WILL BE INSTALLED <br />AS REQUIRED BY SECTION R302 OF THE FBC 5th EDITION (2014) RESIDENTIAL. <br />IF <br />LABELED AS "VENTED", NO FIRE PROTECTION WILL BE REQUIRED. <br />VENTED SOFFIT <br />Z M <br />0 <br />O <br />—0 <br />Z o <br />Z <br />Q <br />z <br />cnnn,, %� <br />W <br />• <br />® <br />U <br />�m <br />Ow <br />�- <br />� <br />ZD <br />o <br />o0 <br />U <br />W � <br />a) Cl) <br />wl�� i■�III�i�Il��ll■■IIII�R9P1lnN�1 A1ttIlEiFp>� � . ��alr�fil ��,�� � <br />