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- <br />TABGE C-2.! <br />TIMBER TRENCH SNORINC HINIMUH T2NBER REQUIREMENTS * <br />SOIL 1'YPE A P a - 25 R ll t 72 ps[ (2 [c. Surchorge) <br />+ <br />LO <br />W <br />DEPTII <br />S <br />. <br />OF <br />CROSS BMCES <br />UPRiC11TS <br />TRENCII <br />IIORIZ. <br />W~ if O RF <br />VERT <br />KAXIMUM ALL04JABLE IIORI20NTAL S <br />. <br />VERT. • <br />PACINC <br />(FEET) <br />SPACINC <br />UP TO <br />UP TO <br />UP TO <br />UP TO <br />UP TO <br />SPACINC <br />SIZE <br />SPACINC <br />FEET <br />(FEET) <br />4 <br />F6E <br />CLOSF. <br />4 <br />S <br />6 <br />B <br />UP TO <br />Not. <br />Not <br />5 <br />6 <br />4X4 <br />4%4 <br />4R4 <br />4X4 <br />4X6 <br />4 <br />Req'd <br />Req'd <br />4X6 <br />To <br />UP <br />e <br />~ <br />e <br />4 <br />8 <br />4X4 <br />4X4 <br />4R4 <br />4X6 <br />486 <br />4 <br />R <br />q <br />d <br />R <br />q <br />d <br />488 <br />TO <br />UP TO <br />10 <br />486 <br />4R6 <br />4X6 <br />6R6 <br />6X6 <br />4 <br />8X8 <br />4 <br />4X6 <br />12 <br />xa <br />a <br />4x6 <br />10 <br />UP TO <br />6 <br />4X4 <br />4X4 <br />4X4 <br />6%6 <br />6R6 <br />4 <br />NO4 <br />Req d <br />N°~, <br />Ruq d <br />4R10. <br />UP TO <br />TO <br />8 <br />4%6 <br />4X6 <br />4%6 <br />6%6 <br />6X6 <br />4 <br />6%8 <br />4 <br />4%6 <br />UP TO <br />10 <br />6X6 <br />6X6 <br />6%6 <br />6%6 <br />6X6 <br />4 <br />8X8 <br />4 <br />4X8 <br />IS <br />P TO <br />12 <br />6%6 <br />6A6 <br />6%6 <br />6%6 <br />6X6 <br />4 <br />8%10 <br />4 <br />4%6 <br />4%10 <br />P TO <br />15 <br />6 <br />6X6 <br />6X6 <br />6x6 <br />6R6 <br />686 <br />4 <br />6%8 <br />4 <br />3X6 <br />P TO <br />T0' <br />8 <br />6X6 <br />6%6 <br />6X6 <br />6R6 <br />6X6 <br />4 <br />BR8 <br />4 <br />786 <br />4X12 <br />P <br />TO <br />20 <br />~O <br />6R6 <br />6X6 <br />6%6 <br />6%6 <br />6%8 <br />4 <br />8x10 <br />4 <br />3%6 <br />P TO <br />12 <br />6R6 <br />6%6 <br />6R6 <br />6X8 <br />6%8 <br />4 <br />8X12 <br />4 <br />7X6 <br />4Y12 <br />OVER <br />20 <br />SgE NOTE 1 <br />- uougiea [ir or equivalent wtth a bending etrength not less than 1500 pet. <br />Manufac[ured membera of equivalent atrength mey be substituted for vooJ, <br />R~. <br />H <br />~ <br />0 <br />r <br />~ <br />x <br />0 <br />~ <br />~ <br /> <br />m <br />~ <br />~ <br />0 <br />~ <br /> <br />~ <br />a <br />w <br />E <br />m <br />0 <br />e <br />~ <br />~ <br />