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FIGURE R602.6(1) - R602.7 :i ;;1 ~:~ ! ~i ~II :'1 ,:i 11 .;j ~i 51 U 'I il :1 :/ 'j ) f . i I I I I , I I Ii ! 5fa IN. MIN. TO EDGE NOTCH MUST NOT EXCEED 25 PERCENT OF STUD DEPTH BORED HOLES SHALL NOT BE LOCATED IN THE SAME CROSS S~CTION OF CUT OR NOTCH IN STUD For SI: 1 inch = 25.4 mm. Note: Condition for exterior and.bearing walls. STUD 5fa IN. MIN. TO EDGE IF HOLE IS BElWEEN 40 PERCENT ~ND 60 PERCENT OF STUD DEPTH. THEN STUD ~ MUST BE DOUBLE AND NO MORE THAN TWO ~ ,SUCCESSIVE STUDSARE DOUBLED AND siT':: BORED v G~URE R602.6(10 NOTCHING AND BORED HOLE LIMITATIONS FOR EXTERIOR WALLS AND BEARING WALLS .:. See the commentary for Section R602.6. the top plate by more than 50 percent of its width, a galvanized metal tie of not less than 0.054 inches thick (i.37mm) (16ga) . and 1112 inches (38mm) wide shall be fastened to each plate across .and to each side of the opening with not less than eight 16d nails at each side or equivalent. See Figure R602.6.1. Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing. . .:. In many cases, drilling or notchinq of the top plate is r:!.ecessary to allow plumbing, heatino or other pipes to ~'. . , "l2...e placed WIthin the exterior walls and load-bear/no in-," . terior walls. When drilling or notching the top plate by ----- ,:' more than one-half its width is necessary. strapping across the fates as illustrated in Fi ure R602.6.1 is required to provide top plE.ltecontinuity and to retain Jbe structural integrity of the wall system as a whole. In the case of a double to late, ani the u er ofthe two plates needs to have a strap installed as described. R,602'.7 Headers. For heade,r spans see T~bles RS02.5(1) and RS02.5(2). . . . .:. At a wall opening, headers are required to transfer .' loads. received from the wall and floors/roof to the . foundation.' Framing over openings such as doors or . 2003 INTERNATIONAL RESIDENTIAL COOE<!!i COMMENTARY-VOLUME 1 6-14