6229 W MAGNOLIA AVE 2020 Plans 2025-03-18

a DETAILSAM. SEE STRUCTURAL PLANS AND l"will Ask 1 I I I I I 1 _ I I I I I I I I I 1 i ROOD & ATTIC VENTILATION ALL VENTS TO BE SCREENED wj �' CORROSION RESISTANT METAL MESH. (3) 2.0 DOLES PER VENT BLOCK = 7.0 SQ. IN. NET AREA (74%). LOCATE VENT BLOCKS AT CORNERS & EVENLY BETWEEN FOR ATTICS. INSTALL VENT BLOCK EA. RAFTER SPACE FOR CATHEDRAL ROOFS. THE MINIMUM NET FREE VENTILATING AREA SHALL BE 1/150 OF THE AREA OF THE VENTED SPACE. EXCEPTION: THE MINIMUM NET FREE VENTILATION AREA SHALL BE 1/300 OF THE VENTED SPACE PROVIDED THE FOLLOWING CONDITION 1S MET: AT LEAST 40% AND NOT MORE THAN 50% OF THE REQUIRED VENTILATING AREA 1S PROVIDED BY VENTILATORS LOCATED IN THE UPPER PORTION OF THE ATTIC OR RAFTER SPACE UPPER VENTILATORS SHALL BE LOCATED NO MORE THAN 3 FEET BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE, MEASURED VERTICALLY, WITH THE BALANCE OF THE REQUIRED VENTILATION PROVIDED BY EAVE OR CORNICE VENTS. WHERE THE LOCATION OF WALL OR ROOF FRAMING MEMBERS CONFLICTS WITH THE INSTALLATION OF UPPER VENTILATORS, INSTALLATION MORE THAN 3 FEET BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE SHALL BE PERMITTED. SAVE BAFFLES: FOR AIR PERMEABLE INSULATIONS IN VENTED ATTICS, A BAFFLE SHALL BE INSTALLED ADJACENT TO SOFFIT AND EAVE VENTS. BAFFLES SHALL MAINTAIN AN OPENING EQUAL OR GREATER THAN THE SIZE OF THE VENT. THE BAFFLE SHALL EXTEND OVER THE TOP OF THE ATTIC INSULATION, THE BAFFLE SHALL BE PERMITTED TO BE ANY SOLID MATERIAL. WSEC.R402.2.3 ITM AREA 8-40 SF J - 5.6 SF VENTILATION REQ'D LOWER , PART OF AnC- p f SF NET FA = 11.39 SF NET INSTALL 30 VENT BLOCKS* 0 .0492 SF MET EA. ROOF VENTS HEAR WALL LINE a W1 SF NET UPPER PART OF ATTIC- 0.69 CABLEINSTALL 2 VENTS y 1.04 SF NET EA. 2.08 SF NET TOTAL VENTING PROVIDED: Flo 00 I 11, 01 CA 4 � � W ® i Ll- 0 af Ccn I� 0 x- 9 vj ®a I