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DESIGN MANUAL& KEYWALL OPERATING GUIDEEAASHTO LRFD METHODOLOGY LEVEL SURCHARGE - 250 PSFThis set of calculations is intended to verify the KeyWall program output of a typical reinforced soil walldesign section. The design follows the AASHTO LRFD procedure outlined previously in the KeystoneDesign Manual. AASHTO LRFD follows the simplified method.The pertinent design information issummarized below:1) General Design DataKeystone Compac II Units (120 pcf with drainage fill and W u = 1.00')Mirafi 3XT Polyester GeogridWall Batter(ι) = 0°, near-vertical orientationDesign Height = 10' (9' exposed + 1' embedment)Base Length, B = 9' (uniform lengths chosen for simplicity)Backslope, β = 0, level backslopeSurcharge = 250 psf (typical roadway surcharge)2) Soil Parameters (degrees, psf,pcf)SOIL PARAMETERS φ c γReinforced Soil 34 0 120Retained Soil 30 0 120Foundation Soil 30 0 120select fill φ cγ3) Geogrid Design Parameters (plf)Geogrid TGeogrid Tult FScr Tcr ult RFFSd cr RFFSid LTDS d RFFS id LTDSTal φ GEO T alStrata Mirafi SG200 3XT 27253500 1.61 1500 1.58 1.10 1.10 1.10 1.10 1399 1.5 1831 933 plf0.90 1648plfCi & Cds = 0.90 for select backfill4) Load and Resistance Factors - Strength IDriving Load Factors Resisting Load FactorsEH d = 1.50 EH r = 0.90EV d = 1.35 EV r = 1.00ES d = 1.50 ES r = 0.75LL d = 1.75AASHTO LRFD Load FactorsResistance FactorsSliding RF sl = 1.00Bearing RF b = 0.65Tension RF t = 0.90Pullout RF po = 0.90AASHTO LRFD Resistance FactorsE.1