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07/0§/19136 10:35 124641947 BENEFITS DESIGN GRP PAGE 06 <br /> 07.05.1996 <br /> 07!56!53 <br /> °`••••'DESIGN OF TREATED TIMBER RETAINING WALL" <br /> THIS PROGRAM IS FOR DESIGNING'A RESTRAINING SYSTEM FOR A TREATED TIMBER RETAINING <br /> WALL WHICH USES PASSIVE PRESSURE TO SUPPORT TME ACTIVE EARTH PRI=SSURE. <br /> THE ACTIVE AND PASSIVE EARTH PRESSURES ARE DERIVED BY USING COULOMB'S EQUATION, <br /> THE BACKFILL IS ASSUMED TO BE WELL DRAINED GRANULAR MATERIAL. <br /> Ti 119 TYPE Or WALL USES TIMSI!R WHICH EXTEND HORIZONTALLY INTO THE BACKFILL Or THE <br /> WALL,THESE MEMBERS ARE CALLEO HEADERS. <br /> TI IG f iG4DCPi5 Ana rEnPENDIGULAR TO THE FADE OF THE WALL. THE HEADERS ARE <br /> OONCOT�7•TA ��1f•Tl M1f Cts1CCP10, ►R�'►'f IG O.hVfr1LL V'nvVVV Vv1P41d1t1r1/Yi. <br /> THE OEADMEM ARE PARALLEL TO THE FACE OF THE WALL. <br /> ""ww"GIVEN INFORMATION"""*""" <br /> "HEIGHT OF WALL:4.0 FT. <br /> `WEIGHT OF SOIL:110 PCF 'ANGLE OF INTERNAL FRICTION;30° <br /> 'ANGLE OF SLOPING GACKFILL:18.40 'SURCHARGE:0 PSF <br /> 'WIDTH OF TIMBERS(HORIZONTAL):5 IN BATTER OF WALL: t IN PER FT <br /> ......"COMPUTED VALUES""""" <br /> COEFFICIENT OF ACTIVE PRESSURE. 0.3840 <br /> ACTIVE THRUSST PER LF.OF WAIL; 339 LBS <br /> ACTIVE THRUST PER 8 FT SECTION OF WALL: 21706 Los <br /> HEIGHT LENGTH LENGTH <br /> OF OF EFFECTIVE OF EFFECTIVE FRICTION PASSIVE TOTAL <br /> TIG MA^W LJ=Arirr'. 1 Cni^'rU MOAR\MAAA U=Af1GCLIM'A AIr►p,K1)±RT.64"1"9Al1'`C Q�OfQTA AI/'►,�............................ <br /> 0.0 4.0 3.40 4.0 1.44 Z12TT 953 3,230 <br /> 1.3 5.0 8.9C 4.0 2.05 2.152 1.004 4,055 <br /> 3.0 8.0 5.82 4.0 1.75 993 1,156 2,148 <br /> TOTAL... . 8,443 <br /> SAFETY FACTOR 3.5 <br /> "'DILL OF MATERIALS FOR 8 FOOT SECTION OF 7.5 FOOT HIGH WALL"""*" <br /> QUANTITY SIZE LENGTH DESCRIPTION BD.FT, <br /> 4 5 X 6 4.0 TREATED TIMBER 40 <br /> 11 5 X 6 8.0 TREATED TIMBER 220 <br /> TOTAL. .... 260 <br /> BOARD-FEET PER SQUARE FOOT OF WALL FACE 8.13 <br /> BOARD-MET PER L. F. OF WALL FEET HIGH - <br />