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DESIGN CALCULATIONSI HEREBY CERTIFY THAT THIS PLAN, SPECIFICATIONS, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF WASHINGTON. ________________________________________________ DATE: _______September 16, 2021______ ROBERT J. RACE, P.E. LICENSE NO. 26697 DESIGN CALCULATIONS LOT 7, PALISADES WEST YELM, WA SUBMITTED BY: Robert Race, P.E. REA Analysis Project:New Project Location:Site Location Designer:xxx Date:8/31/2021 Section: W1 S_31.0_to_118.0 Design Method: NCMA_09_3rd_Ed, Ignore Vert. Force Design Unit: GravityStone Edge (CAN) Seismic Acc: 0.400 SOIL PARAMETERS φ coh γ Reinforced Soil: 32 deg 0psf 120pcf Retained Soil: 32 deg 0psf 120pcf Foundation Soil: 32 deg 50psf 120pcf Leveling Pad: Crushed Stone GEOMETRY Design Height: 16.53ft (14.00ft Exp.)Live Load:50psf Wall Batter/Tilt: 6.20/ 0.00 deg Live Load Offset: 2.00ft Embedment: 2.53ft LL2 Width: 20ft Leveling Pad Depth: 0.50ft Dead Load:0psf Slope Angle: 0.0 deg Dead Load Offset: 0.0ft Slope Length: 0.0ft Dead Load Width: 0ft Slope Toe Offset: 0.0ft Vertical δ on Single Depth Toe Slope Angle: 26.00 Toe Slope Length: 20.00 Toe Slope Bench: 0.00 FACTORS OF SAFETY (Static / Seismic) Sliding:1.50 / 1.13 Pullout: 1.50 / 1.13 Overturning:2.00 / 1.50 Uncertainties: 1.50 / 1.13 Bearing:2.00 / 1.50 Connection: 1.50 / 1.13 Shear:1.50 / 1.13 Bending: 1.50 / 1.13 REA Analysis 5.1.25.1261 1 RESULTS (Static / Seismic) FoS Sliding:3.91 / [2.53 ]FoS Overturning: 9.55 / [5.11 ] Bearing 1,988 / [ 2,044 ]FoS Bearing:17.20 / [ 16.73 ] Pullout 1.50 Total Pullout 84,996 FoS Total Pullout 21.66 Total Pullout (S)0 FoS Total Pullout (S) 0.30 Top FoSot: 17.56 FoS Connection: 2.51 ID Height Length Name Ta_tn [Ta_tns]TMax [Tmd]Tal/FS [seis]FS Tal [seis]PkCn [seis]PkCn/FS [seis]FS PO FS Sldg 8 14.67 14.00 SG200 1919 [2975]111 [242]1280 [2645]17.32 [8.43]880 [1174]11.91 [3.74]8.98 [2.82]66.07 [38.36] 7 12.67 14.00 SG200 1919 [2975]245 [242]1280 [2645]7.84 [6.60]1315 [1753]8.06 [4.38]12.50 [5.79]24.91 [15.47] 6 10.67 14.00 SG200 1919 [2975]353 [242]1280 [2645]5.44 [5.32]1315 [1753]5.59 [3.53]15.12 [8.58]14.62 [9.47] 5 8.67 14.00 SG200 1919 [2975]461 [242]1280 [2645]4.16 [4.46]1315 [1753]4.28 [2.96]17.75 [11.31]10.21 [6.80] 4 6.67 14.00 SG200 1919 [2975]569 [242]1280 [2645]3.37 [3.84]1315 [1753]3.47 [2.54]20.38 [14.02]6.70 [4.99] 3 4.67 14.00 SG200 1919 [2975]677 [242]1280 [2645]2.83 [3.37]1315 [1753]2.91 [2.23]23.00 [16.70]5.41 [4.10] 2 2.67 14.00 SG200 1919 [2975]785 [242]1280 [2645]2.44 [3.00]1315 [1753]2.51 [1.99]25.63 [19.37]4.54 [3.48] 1 0.67 14.00 SG200 1919 [2975]584 [242]1280 [2645]3.29 [3.71]1315 [1753]3.38 [2.46]43.29 [30.22]3.91 [3.03] Column Descriptions: Ta: allowable geogrid strength Rc %: percent coverage for geosynthetics EP (Pa) internal active earth pressure LL (Pql) earth pressure due to live load surcharge DL (Pqd) earth pressure due to dead load surcharge Tmax maximum earth pressure on geosynthetic layer FSstr factor of safety on geogrid strength (Ta/Tmax) Ta cn allowable tension on the connection FS Pkcn, factor of safety on the connection (Ta cn/Tmax) FS PO, factor of safety on pullout (Ta pullout/(Tmax - LL) Grid Embedment, depth of embedment beyond the theorectical failure plane. REA Analysis 5.1.25.1261 2