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ROOF ATTIC VENTILATION <br />ATTIC AREA <br />TOTAL VENTING REQUIRED <br />2790 SQ. FT. <br />1339 SQ. IN. <br />UPPER VENT 40% NET VENT MIN. <br />536 SQ. IN. <br />UPPER VENT 50% NET VENT MAX. <br />670 SQ. IN. <br />UPPER VENTS REQUIRED <br />48" TAMCO OFF -RIDGE VENT (138 SI NET FREE) <br />4 VENTS <br />NET FREE AREA UPPER ROOF VENTING <br />552 SQ. IN. <br />NET FREE AREA SOFFIT VENTING <br />787 SQ. IN. <br />LINEAR FT. SOFFIT REQ'D AT 6.57 SQ. IN. / LF.1 <br />120 LF. <br />NOTE: LOCATE RIDGE VENTS 2'-0" OFF ALL <br />HIPS RIDGES OR VALLEYS, MIN., TYP. <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 />ACCORDANCE WITH SECTION R905.1.1, <br />FOR ASPHALT SHINGLES REFERENCE TO SECTION R905.2 <br />FOR TILE ROOFING REFERENCE TO SECTION R905.3 <br />ROOF PLAN <br />SCALE: 1 /4"=1'-0" <br />lr <br />W <br />tr <br />�z0= <br />O F- <br />Lu <br />woWC¢O <br />f/JU�W <br />< ! LJ3: 5J- <br />J(nLuLu <br />T (r CC <br />°tSLL <br />ZZPW <br />cr <br />Wg¢�a <br />00 <br />QZD <br />� <br />Q <br />O �¢ <br />Q <br />O <br />0 <br />0 <br />U <br />O <br />cm <br />co <br />5 <br />0 <br />a <br />O <br />U. <br />0-1 <br />O <br />I <br />w <br />O <br />!25 <br />a <br />U) <br />w <br />a, <br />0 <br />U <br />W <br />G <br />O� <br />�o <br />No 77824 •� <br />STATE OF <br />OR to, <br />I <br />SPRINGS <br />PLAN # 6120 <br />RELEASED: 9/17/21 <br />SHEET i <br />A3 o I <br />O <br />z <br />w <br />x <br />z <br />CC <br />0 <br />z <br />a <br />w <br />w <br />x <br />