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Project: <br />Job #: <br />Date: <br />Concrete Equipment Pad Foundation Design: <br />Location: <br />Service Loads: Overturning Stability Check: <br />PDL =Superimposed weight of equipment MOT == M E/W + P E/W x (B/2 ±e p ) <br />PE/W =0.6W or 0.7E; up or down Mr == 0.6 (PDL x [B/2 ± ep]+ Po x B/2) <br />eP =Eccentricity of vertical loads D/C = <br />Po =self-weight of pad <br />ME/W =0.6W or 0.7E <br />Pad Dimensions: <br />L =Length <br />B =Width <br />t =Thickness <br />D =Embedded Depth <br />Allowable Soil Pressures <br />σa1 =For sustained loads <br />σa2 =For short-term loads (wind, seismic) <br />σLB =Lateral bearing used w/ Cohesion <br />σLB =Lateral bearing used w/ Friction <br />Demand/Capacity Checks: <br />DL Only D + 0.6W/0.7E 0.6D + 0.6W/0.7E <br />P = <br />M = <br />e = <br />Lb = <br />σ = <br />σa = <br />D/C = <br />Sliding: <br />VE/W =0.6W or 0.7E <br />σc =cohesion Cf =coefficient of friction <br />Vr, sliding == σc x LB Vr, sliding == Cf x 0.6(PDL + Po) <br />Vr, lat brg == σLB x B x D2 /2 Vr, lat brg == σLB x B x D2 /2 <br />Vr, total =Vr, total = <br />D/C = D/C = <br />874 ft-# <br />1500 psf <br />2467 # <br />0 ft-# <br />2000 psf <br />150 psf/ft <br />100 psf/ft <br />0.67 ft <br />105 # <br />0.00 ft <br />AX.1 <br />2572 # <br />0.0 ft <br />5.17 ft <br />4.00 ft <br />874 ft-# <br />400 # <br />2067 # <br />26.58% <br />130 psf <br />1233 # <br />0.25 <br />4.00 ft <br />328 # <br />1500 psf 2000 psf <br />9.40% <br />2000 psf <br />6.50%7.96% <br />370 # <br />4.00 ft <br />130 psf <br />0 # <br />1233 # <br />0 # <br />370 # <br />0.00 ft <br />4.00 ft <br />119 psf <br />0.64 ft <br />188 psf <br />0.34 ft <br />City of Santa Ana Corp Yard <br />26035 <br />5/1/2026 <br />88.60% <br />1375 # <br />874 ft-# <br />1085 ft-# <br />2960 ft-# <br />36.66% <br />15 of 32 <br />MINIMUM WEIGHT GOVERNS <br />SLIDING, DESIGN OK FOR 600# MAX <br />EQUIPMENT WEIGHT <br />MINIMUM PAD SIZE, <br />ADD FOR OTHER <br />EQUIPMENT FOR <br />TOTAL SLAB DIM, <br />TYP <br />PROVIDE CODE MINIMUM REINFORCING: 12" x 8" x 0.0018 = 0.173 IN^2/FT REQUIRED <br />PROVIDE #5 @ 12" = 0.20 IN^2/FT :: OK