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CORNERSTONE <br />L V/� _DESIGNER <br />TENSION CALCULATIONS <br />Tmax is the maximum tension in the reinforcing based on the earth pressure and surcharge loads applied. <br />In the NCMA design method, earth pressures are calculated using the Coulomb Earth pressure equation. Infinite <br />surcharge loads are applied as q x ka. In designs were there is a broken back slope, or the surcharge is not uniform <br />over the area, a tie -back wedge analysis method is used. <br />FS = (Tal * FS_tn) / Tmax <br />TABLE OF RESULTS <br />Elevation[ ft] <br />ka <br />z <br />sv <br />Name[ ft] <br />Tult[ ppf] <br />Ta[ ppf] <br />° <br />Rc /o <br />Tmax[ <br />[ ppq <br />FS <br />6.00 <br />�'0.235 <br />0.244 <br />1.00 <br />2.00 1 <br />5XT <br />4.700 1,786 <br />100 58 <br />45.83 <br />4.00 <br />3.00 <br />2.00'� <br />5XT <br />4,700 <br />11786 <br />100� <br />232� <br />11.55 <br />2.00 _ <br />0.242 <br />4.83 <br />1.67 <br />5XT _ <br />4 700 <br />�� 11786 <br />100 <br />301 <br />8.91 <br />0.67 �0.244 <br />6.17 <br />1.00 <br />5XT__ <br />4700 <br />1,786 <br />100 <br />223 <br />11.99 <br />Note: Calculations and quantities are for PRELIMINARY ANALYTICAL USE ONLY and MUST NOT be used for final <br />n or construction without the independent review, verification, and approval by a qualified professional engineer. <br />CornerStone Analysis and Design 5.0.19309 rll//S <br />