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S2308.3 Openinqs in exterior wa11s S2308.3.1 Headers shall be provided over each opening in exterior bearing walls. The spans in Table 2308.3A through Table 2308.3C may be used for one-and two-family residences. Headers for other buildings shall be designed in accordance with ~2301.2 or ~2301.3.1. Headers may be of two pieces of nominal 2-inch framing lumber set on edge and nailed together or may be of solid lumber of equivalent size. S2308.3.2 Wall studs shall support the ends of the header in accordance with Table 2308.3A, Table 2308.3B, and Table 2308.3C. TABLE 2308.3A HEADER SPANS {1} FOR EXTERIOR BEARING WALLS (MAXIMUM HEADER SPANS FOR DOUGLAS FIR-LARCH, HEM-FIR, SOUTHERN PINE, AND SPROCE-PINE-FIR{2} AND REQUIRED NUMBER OF JACK STUDS) Buildinq Width{3} (ft) 20 28 36 I Headers Supportinq: I Size Span NJ Span NJ Span NJ Roof, Ceiling{4} 2-2x4 3-6 1 3-2 1 2-10 1 2-2x6 5-5 1 4-8 1 4-2 1 2-2x8 6-10 1 5-11 2 5-4 2 2-2xl0 8-5 2 7-3 2 6-6 2 2-2x12 9-9 2 8-5 2 7-6 2 3-2x8 8-4 1 7-5 1 6-8 1 3-2xl0 10-6 1 9-1 2 8-2 2 3-2x12 12-2 2 10-7 2 9-5 2 4-2x8 9-2 1 8-4 1 7-6 1 4-2xl0 11-8 1 10-6 1 9-5 2 4-2x12 14-1 1 12-2 2 10-11 2 NOTES: NJ - Number of jack studs required to support each end. Where the number of required jack studs equals 1, the header may be supported by a framing anchor attached to the full-height wall stud. 1. Spans are given in feet and inches (ft-in). 2. Tabulated values assume #2 Grade lumber. 3. Building width is measured perpendicular to the ridge. For widths between those shown, spans may be interpolated. 4. Maximum loads: Roof dead load of 20 psf and live load of 20 psf, floor dead load of 10 psf and live load of 40 psf, and wall dead load of 11 psf. . TABLE 2308.38 HEAD. S~.{ 1 }POR EXTERIOR BEARING WALLS