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3 boxes specified for generation of central block base <br /> Length of line segments for active and passive portions of <br /> sliding block is 17 . 0 ft <br /> Box x-left y-left x-right y-right Width <br /> no. (ft) (ft) (ft) (ft) (ft) <br /> 1 99 . 0 134 . 0 100 . 0 134 . 0 1 . 5 <br /> 2 150 . 0 109 . 0 151 . 0 109 . 0 1 . 5 <br /> 3 152 . 0 109 . 0 600 . 0 113 . 5 1 . 5 <br /> Factors of safety have been calculated by the <br /> * * * * * SIMPLIFIED JANBU METHOD <br /> The 10 most critical of all the failure surfaces examined <br /> are displayed below - the most critical first <br /> Failure surface No. 1 specified by 17 coordinate points <br /> Point x-surf y-surf <br /> No. (ft) (ft) <br /> 1 98 . 76 135 . 00 <br /> 2 99 . 70 134 . 17 <br /> 3 150 . 97 109 . 26 <br /> 4 360 . 77 111 . 71 <br /> 5 361 . 16 112 . 11 <br /> 6 373 . 19 124 . 13 <br /> 7 385 . 21 136 . 15 <br /> 8 397 . 23 148 . 17 <br /> 9 409 . 25 160 . 19 <br /> 110 421 .27 172 .22 <br /> 11 433 . 29 184 . 24 <br /> 12 445 . 31 196 . 26 <br /> 13 457 . 33 208 . 28 <br /> 14 469 . 35 220 . 30 <br /> 15 481 . 37 232 . 32 <br /> 16 493 . 39 244 . 34 <br /> 17 500 . 85 251 . 79 <br /> ** Corrected JANBU FOS = 1 . 825 ** (Fo factor = 1 . 078) <br /> Failure surface No. 2 specified by 17 coordinate points <br /> Point x-surf y-surf <br /> No. (ft) (ft) <br /> 1 98 . 29 135 . 00 <br /> 2 99 . 31 134 . 09 <br /> 3 150 . 76 109 . 47 <br />