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WOOD <br />thereto to provide adequate lateral support. Bridging shall <br />be placed ill every stud cavity and at a frequency such that <br />no stud so braced shall have a height-to-least-firickness <br />ratio exceeding 50 with the height of time stritt nicasured <br />between horizontal framing and bridging or between <br />bridging, whicileveris greater. <br />2308.9.10 Cutting and flotchilig. in exterior walls and <br />bearing partitions, any Nvood stud is permitted to be cut or <br />notched to a depth not exceeding 25 percent of its width. <br />Cutt(ing or notching of studs to a depth not greater than 40 <br />percent of the width Of the stud is pci-milted in nonbcaring <br />partitions supporting no loads other than the weight of the <br />partition, <br />230&9.11 Bored holes. A hole not greater in diameter <br />than 40 percent of the stud width is tier -emitted to be bored <br />in any wood stud, Bored holes not greater than 60 percent <br />of tile widdi of the stud are pernlitted ill nonbcaring palli- <br />tiolls or in any wall where cash bored stud is doubled, pro- <br />vided not more than two such successive doubled studs are <br />so bored. <br />In no case shall the, edge of the bored hole be ricarer <br />thall '/8 inch (15,9 111111) to tile edge of the stud, <br />Bored holes shall not be located at (lie same section of <br />stud as a Cri( or notch. <br />2308,10 Roof anal ceiling framing, The framing details <br />required in this section, apply to roofs having a minimum <br />slope of three units vertical in 12 units horizontal (25-percent <br />slope) or grcalcl% Where the roof slope is less than till -cc, 1111its <br />vertical in 12 mlits horizontal (25-percent slope), members <br />supporting rafters and ceiling joists such as ridge board, )lips <br />and valleys shall be designed as beams. <br />2309.1.0.1 Wind uplift, The roof COn8trL1Cti0I) shall have <br />rafter and truss tics to the wall below, Resultmit, lipl:ift <br />loads shall be, transferred to time foundation rising a contin- <br />LIOLIS load path. The rafter or truss to wait connection shall <br />comply wilh Tables 2304,9,1 and 2308-10A. <br />1308.10.2, Ceitingioist spans, Allowablespalis for ceiling <br />joists shall be in accordance Nvitli Tablo 2308,10-20) or <br />TABLE 2308,9,6 <br />HEADER AND GIRDER SPANS'FOR INTINHIOR REARM, WALLS <br />(Maximum Spans for Doug" 'In's'Fir-Larch, Hem.Fir, Southern Pine an(] Spruce-Plne•Fir b and Required Number of Jack Stotts) <br />HEADERS AND GIRDERS <br />SUPPORTING <br />SIZE <br />BUILDING width` (feet) <br />20 28 <br />— <br />$pan <br />NJ' <br />— <br />Span <br />NJ' <br />span <br />NJ' <br />One Floor, Only <br />2-2x4 <br />3-1 <br />1 <br />2-8 <br />1 <br />2-5 <br />1 <br />2-2x6 <br />4-6 <br />1 <br />3-11 <br />1 <br />3-6 <br />1 <br />2-2x8 <br />5-9 <br />1 <br />5-0 <br />2 <br />el-5 <br />2 <br />2-2xt0 <br />7-0 <br />2 <br />6-1 <br />2 <br />5-5 <br />2 <br />2-2x12 <br />8-1 <br />2 <br />7-0 <br />2 <br />.............------ <br />6-3 <br />2 <br />3-2x8 <br />7-2 <br />1 <br />6-3 <br />1 <br />5-7 <br />2 <br />3-2x10 <br />8-9 <br />1 <br />7-7 <br />2 <br />6-9 <br />2 <br />3-2xl2 <br />10.2 <br />2 <br />8-10 <br />2 <br />7-10 <br />2 <br />4-2x8 <br />. ....... . . <br />9-0 <br />1 <br />7-8 <br />1 <br />6-9 <br />1 <br />4-2x10 <br />10-1 <br />1 <br />8.9 <br />1 <br />7-10 <br />2 <br />4-2x12 <br />11.9 <br />1 <br />10-2 <br />2 <br />9-1 <br />2 <br />T%vo Floors <br />2-2x4 <br />2-2 <br />1 <br />1-10 <br />1 <br />1-7 <br />1 <br />2-2x6 <br />3-2 <br />2 <br />2-9 <br />2 <br />2-5 <br />2 <br />2-2x8 <br />01.1 <br />2 <br />3-6 <br />2 <br />3-2 <br />2 <br />2-2x10 <br />4-11 <br />2 <br />4-3 <br />2 <br />3-10 <br />3 <br />2-2X12 <br />5-9 <br />2 <br />5.0 <br />3 <br />4-5 <br />3 <br />:T2Y,8 <br />5.1 <br />2 <br />4-5 <br />2 <br />3-11 <br />2 <br />3-2x10 <br />6-2 <br />2 <br />5.4 <br />2 <br />4-10 <br />2 <br />3.2x12 <br />7-2 <br />2 <br />6.3 <br />2 <br />5-7 <br />3 <br />4-2x8 <br />6.1 <br />1 <br />5-3 <br />2 <br />4-8 <br />2 <br />4-2x10 <br />7-2 <br />2 <br />6-2 <br />5-6 <br />2 <br />4-2x12 <br />8_4 <br />2 <br />7-2 <br />2 <br />6-5 <br />2 <br />For Sr: I hiclin 9.5.4 mm, I, foot = 304.8 nin), <br />9. Spans ere ggivol ill feet and lliches (ft-in). <br />b. Tabulated VAILICS are for No. 2 grade, lumber. <br />c. Building width is measured perpendicular to the ridge. For widths between those shown, spans are pormitted to be interpolated. <br />d, NJ - Number of jock- studs tequiucd to support eaehi end. Where the, number of mpired jack studs equals one, (lie headers arc. permitted to be supported by all <br />approved framing anchor allached to the full -height wall slurp AMI to the hcadcf- <br />2012 INTERNATIONAL BUILDING CODEc) 491 <br />