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881 CHAPTER 3 <br /> R602.10.3 <br /> Footnote his provided to remind the user that the capacity of let-in bracing(Method LIB)is <br /> predicated on the use of a gypsum board finish on either side of the wall at the.Method LIB <br /> location.This gypsum board sheathing must be attached with a maximum fastener spacing of <br /> 8 inches on center. <br /> Footnote c limits the use of Method CS-SFB(continuously sheathed structural fiberboard)to <br /> areas where wind speeds are less than or equal to 100 mph.While this limitation was formerly <br /> included in the text of the IRC,in the 2012 edition it is relegated to this footnote_ <br /> 'TABLE 3.4 <br /> Adjustor ,f t TABLE R602.10.3(2) <br /> I i1 i3 ADJUSTMENT FACTORS s To THE REQUIRED LENGTH OF WALL^n;'.ACIi\!G <br /> 'factors to <br /> he required 6 Adjustment Factor'.b - <br /> wind required <br /> ng a Adjustment Story/ <br /> [multiply <br /> Based On Supporting Condition 1 Y length from Table Applicable <br /> Tdetermined in - 8602.10.3{7)by this factor] Methods <br /> able 3.3 9 1.00 <br /> One-story <br /> IRC Table structure C 1.20 <br /> R602.10.3(2) B 1.50 <br /> Exposure Two-story B 1.00 <br /> li Category structure C 1.30 <br /> 0 1.60 <br /> B 1.00 <br /> Three-story <br /> ,I <br /> structure C 1.40 <br /> • <br /> D 1.70 <br /> 5 5 feet 0.70 <br /> Roof10 feet 1 <br /> only <br /> (i 75 feet 1.30 <br /> 20 feet 1.60 <br /> _5 feet 0.85 <br /> Roof eave-to- Roof+ 1 10 feet <br /> ridge height floor 1.00 <br /> ' j 15 feet 1.15 Alt methods <br /> 20 feet 1.30 <br /> 5 feet 0.90 <br /> Roof+2 10 feet 1.00 <br /> floors 15 feet <br /> 1.10 <br /> 20 feet Not permitted <br /> 8 feet 0.90 <br /> Wall height 9 t 0.95 <br /> •O adjustment Anystory 10 feet <br /> 1.00 <br /> 11 feet 1.05 <br /> 12 feet 1.10 <br /> Number of 2 1.00 <br /> braced wall 3 <br /> Q lines(per plan AnYstory 1.30 <br /> direction)° 4 1.45 <br /> >5 1.60 <br /> For Si:i inch,,25A nun,1 foot=305 mm,T pound=4.48 N- <br /> v.linear interpolation droll be permitted. <br /> b.The total adjustment factor is the product of all applicable adjustment factors. <br /> c.The adjustment factor is permitted to be 1.0 when determining bracing amounts for intermediate braced wall lines provided the bracing <br /> amounts on adjacent braced wall tines are based on a spacing and number that neglects the intermediate braced wall line. <br />