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FIGURE R602.6.1 - TABLE 602.7.2 EXTERIOR OR BEARING WALL ~ 16 GAGE (0.054 IN.) AND 1.5 IN. WIDE METAL TIE ACROSS AND TO EACH SIDE OF THE NOTCH WITH 8-16d NAILS EACH SIDE PIPE For SI: 1 inch = 25.4 mm. , c;;;,RE R602.6.~ TOP PLATE FRAMING TO ACCOMMODATE PIPING .:. See the commentary for Section R602.6.1. fished based on the .construction of the header, the header depth, and the depth of the house. Note "a" to the table explains the depth criteria; which is based on a single story with a clear-span trussed roof or a two-. stoiyin which part of the load from the floors and roofs is supported by interior bearing walls. House depth is based on the span from the header to an interior bear- ing wall or the opposing exterior waiL 2-inchcby-4-inch (51 mm by 102 mm) member may be used as a, header in interior or exterior nonbearing walls for openings up to 8 feet (2438 mm) in .width if the vertical distance to the parallel nailing surface above is not more than 24 inches (610 mm). For such nonbearing he'a:ders, no cripples or blocking are required above the header. ' " R602. 7.2 N onbearing walI:s. Load-bearing headers are notre- quired in interior or exterior nonbearing walls. A single flat .:. In walls that are not supporting significant loads, the code provides a simple (more economical) option for constructing headers, TABLE R602.7.2 ' .., MAXIMUM SPANS FOR WOOD STRUCTURAL PANEL BOX HEADERsa " HEADER DEPTH HOUSE DEPTH (feet) HEADER CONSTRUCTIONb (inches) 24 26 , 28 ,3D 32 Wood structural panel-aile side 9 4 4 3, 3 - 15 5 5 4 3 3 Wood structural panel-both sides 9 7 5 5 4 3 15 8 8 7 7 6 J .j j I 1 J For S1: 1 inch = 25.4 =, 1 foot = 304.8 mID. a. SP1lIlS are. based on single story with clear-span trussed roof or two-story with floor and roof supported by interior-bearing wails. b. See !<igureRi5o.2.7.2 f~r c;?n~truction details. ' .:. See the commentary for Section R602.7.1. 6-16 . 2003 INTERNATIONAL RESIDENTIAL CODE@.COMMENTARY-VOLUME, 1 i 1