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~n+-- <br />.l.^.C9T.i7i5:~.--r~:CL::": ....1......-~....... ~ - . <br />, TABLE C-1.1 <br />" TIMBER TRENCII SIIORiNG MINIMUM TIMBER REQUIREMEtITS • <br />SOII TYPE A Pa • 25 X II + 72 psi (I ft Surcharge) <br />~n <br />~ <br />. <br />DEPTN <br />OF <br />HORIZ <br />~~IOT11 OF TNENCfi FEET <br />yERT. <br />VERT. <br />MAJ(IMUM ALLOWAOLE IIOR(2UNTAL SPACING <br />TRENCN <br />(FEET) <br />. <br />SPACING <br />llP Tn <br />UP TO <br />UP TO <br />l1P TO <br />UP TO <br />SPACING <br />SIZE <br />SP11C1NG <br />~PEET <br />(FEET) <br />4 <br />1 5 <br />9 <br />12 <br />(FEET) <br />(!N) <br />(FE[T) <br />UP TO <br />Not <br />5 <br />4X <br />4R <br />4X6 <br />X6 <br />X6 <br />4 <br />R' <br />2X6 <br />T.0 <br />!1 <br />4X4 <br />4X4 <br />4X5 <br />6X6 <br />6R6 <br />4 <br />Re 'd <br /> <br />2II8 <br />UP TO <br />. ta <br />10 <br />x <br />UP TO <br />12 <br />4X6 <br />4X6 <br />6X6 <br />6%6 <br />686 <br />4 <br />8X8 <br />4 <br />2X6 <br />UP TO <br />Not <br />10 <br />6 <br />4%4 <br />4X4 <br />4%6 <br />% <br />6X <br />'4 <br />R' <br /> <br />UP <br />TO <br />. <br />. <br />. <br /> <br />TO <br />8 <br />4X6 <br />4R6 <br />6%6 <br />6X6 <br />6%6 <br />4 <br />BX8 <br />4 <br />2X6 <br />UP TO <br />15 <br />10 <br />x <br />x <br />X6 <br />2X6 <br />UP TO <br />12 <br />6X6 <br />61f6 <br />6R6 <br />6R9 <br />6%B <br />4 <br />OR 0 <br />4 <br />UP TO <br />15 <br />6 <br />6%6 <br />,6X6 <br />• 6X6 <br />6X8 <br />61f8 <br />4 <br />6X8 <br />4 <br />7%6 <br />UP TO <br /> <br />• <br />TO <br />B <br />6R6 <br />6X6 <br />6R6 <br />6X8 <br />6%8 <br />4 <br />8X8 <br />4 <br />3X6 <br />UP TO <br />20 <br />10 <br />xe <br />x <br />x <br />x <br />x o <br />x <br />UP TO <br />. <br />• • <br />• <br />12 <br />8X8 <br />81(8 <br />8X8 <br />8%8 <br />8X10 <br />4 <br />10X10 <br />4 <br />3X6 <br />OVER <br />. . <br />20 SEE NOTE 1 <br />. <br />~ <br />C <br />0 <br />~ <br />0 <br />~ <br />~ <br />~ <br />a <br />~ <br />m <br />~ <br />O <br />ag <br />^ <br />N <br />~ <br />~ <br />~ <br />E. <br />M <br />ri,ncu vaF ur cyuiraianc wicn a uenaing sC1'eng[n nOt 1055 than tlbU ps1. <br />Flanufactured members of equivalent strength may by substituted for wood. <br />