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LOWER ROOF ATTIC VENTILATION <br />ATTIC AREA <br />TOTAL VENTING REQUIRED <br />120 SQ FT <br />1 15 SQ IN <br />LINEAR FT. SOFFIT REQ'D AT 6.57 SQ. IN. / LF. 18 LF. <br />R806.2:THE MINIMUM NET FREE VENTILATING AREA SHALL <br />NOT BE LESS THAN 1/150 OF THE VENTED SPACE. <br />UPPER ROOF ATTIC VENTILATION <br />ATTIC AREA <br />TOTAL VENTING REQUIRED <br />1535 SQ. FT. <br />737 SQ. IN. <br />UPPER VENT 40% NET VENT MIN. <br />295 SQ. IN. <br />UPPER VENT 50% NET VENT MAX. <br />368 SQ. IN. <br />UPPER VENTS REQUIRED <br />48" TAMCO OFF -RIDGE VENT (138 SI NET FREE) <br />3 VENTS <br />NET FREE AREA UPPER ROOF VENTING <br />414 SQ. IN. <br />NET FREE AREA SOFFIT VENTING <br />41 SQ. IN. <br />LINEAR FT. SOFFIT REQ'D AT 6.57 SQ. IN. / LF. <br />63 LF. <br />NOTE: LOCATE RIDGE VENTS 2'-0" OFF ALL <br />HIP.' RIDGES OR VALLEYS MIN.,TYP <br />Its <br />R806.2:THE MINIMUM NET FREE VENTILATING AREA SHALL <br />NOT BE LESS THAN 1/150 OF THE VENTED SPACE. <br />EXCEPTION: THE MINIMUM NET FREE VENTILATION AREA <br />SHALL BE 1/300 OF THE VENTED SPACE PROVIDED NOT <br />LESS THAN 40 PERCENT AND NOT MORE THAN 50 <br />PERCENT OF THE REQUIRED VENTILATING AREA IS <br />PROVIDED BY VENTILATORS LOCATED IN THE UPPER <br />PORTION OF THE ATTIC OR RAFTER SPACE. UPPER <br />VENTILATORS SHALL BE LOCATED NOT MORE THAN 3 <br />FEET (914 MM) BELOW THE RIDGE OR HIGHEST POINT OF <br />THE SPACE, MEASURED VERTICALLY, WITH THE BALANCE <br />OF THE REQUIRED VENTILATION PROVIDED BY EAVE OR <br />CORNICE VENTS. WHERE THE LOCATION OF WALL OR <br />ROOF FRAMING MEMBERS CONFLICTS WITH THE <br />INSTALLATION OF UPPER VENTILATORS, INSTALLATION <br />MORE THAN 3 FEET (914 MM) BELOW THE RIDGE OR <br />HIGHEST POINT OF THE SPACE SHALL BE PERMITTED. <br />UNDERLAYMENT APPLICATIONS SHALL BE INSTALLED IN <br />ACCO.RQsANCE WITH SECTION R905.1.1 <br />FOR ASPHALT SHINGLES REFERENCE TO SECTION R905.2 <br />FOR TILE ROOFING REFERENCE TO SECTION R905.3 <br />09 <br />4 <br />F <br />No <br />cz <br />Im <br />00 <br />tn <br />L <br />rA3* I <br />n.44 <br />W <br />0 z O <br />w�ZO <br />>oCQO <br />w <br />v�ww U <br />���OwC <br />��00cf) <br />Z Z Z ~ Z <br />wa=tea <br />�U)oOU <br />� _ Z L <br />