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ARMORFLEX DESIGN REPORT <br />ArmorFlex Blocks by ARMORTEC Erosion Control Solutions <br />4301 Industrial Drive <br />Bowling Green, Kentucky 42101 <br />Phone (270)843-4659 <br />Toll free (800) 305-0523 <br />Fax (270) 783-8952 <br />Design Report Printed from ArmorFlex Design Software <br />Report Type: Detailed Calculations for Block 60 <br />Company: Bumett Consuking Engineers, Ltd. Client: City of Greeley, CO <br />Designer: Tom Bumett Waterway: North Eagleview <br />Project No.: 02.08 Location: Pond Channel Sta 23+00 <br />Report Date: 7/15/2003 Event: 100 year storm <br />Input Variables for Factor of Safety Calculations <br />Side Slope, theta = 0 radians <br />Bed Slope, lambda = 0.046 radians <br />Velocity, V = 18 ft/s <br />Shear Stress, tau = 9.76 psf <br />Block Projection, dZ = 0.042 ft <br />Submerged Block Weight, WS = 60.6 Ibs <br />Moment Arm 1, L1 = 0.312 ft <br />Moment Arm 2, L2 = 0.971 ft <br />Moment Arm 3, L3 = 0.5 ft <br />Moment Ann 4, L4 = 0.971 ft <br />Critical Shear Stress, tauCrit = 31 psf <br />Factor of Safety Calculations for Block 60 <br />The following calulations use the equations presented in Table 2.2 <br />from the ArmorFlex Design Manual included with this software application. <br />Solve Equation 2.39 <br />M/N = L4/L3 = 0.971 /0.5 = 1.942 <br />Solve Equation 2.36 <br />Fd' = 0.5(rho)(dZ)(W)(V^2) = 0.5(1.94)(0.042)(1.292)(18"2) = 17.05 Ibs <br />FI' = Fd' = 17.05 Ibs <br />Solve Equation 2.37 <br />eta = tau/tauCrit = 9.76/31 = 0.315 <br />Calculate Algebraic Constants for Equation 2.35 <br />C1 = COS(lamtxia) = COS(0.046) = 0.9989 <br />C2 = (M/N + 1)/eta = (1.942 + 1)/0.315 = 9.3397 <br />C3 = (L1/L2)SIN(theta) _ (0.312/0.971)SIN(0) = 0 <br />C4 = SIN(lambda) = SIN(0.046) = 0.046 <br />s /4 <br />