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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 />O - Phone (270) 843659 <br />Toll free (800) 305-0523 <br />0 Fax (270) 783-8952 <br />Design Report Printed from Arrnorflex Design Software <br />Report Type: Detailed Calculations for Block 55 <br />Company: Bumett Consulting Engineers, Ltd. Client: City of Greeley, CO <br />Designer: Tom Bumett Waterway: North Eagleview <br />Project No.: 02.08 Location: Channel Sta 17+00 (#3 Road crossing) <br />e Repoli Date: 7/15/2003 Event: 100 year storm <br />Input Variables for Factor of Safety Calculations <br />O Side Slope, theta = 0.1851 radians <br />Bed Slope, lambda = 0.002 radians <br />` Velocity, V = 4.27 ft/s <br />Shear Stress, tau = 0.53 psf <br />Block Projection, dZ = 0.042 ft <br />• Submerged Block Weight, WS = 58.3 Ibs <br />Moment Artn 1, L1 = 0.25 ft <br />Moment Arm 2, LZ = 0.971 ft <br />Moment Arm 3, L3 = 0.4 ft <br />Moment Arm 4, L4 = 0.971 ft <br />~ Critical Shear Stress, tauCrit = 32.8 psf <br />Factor of Safety Calculations for Block 55 <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 = L4lL3 = 0.971/0.4 = 2.428 <br />Solve Equation 2.36 <br />Fd' = 0.5(rho)(dZ)(W)(V^2) = 0.5(1.94)(0.042)(1.292)(4.27^2) = 0.96 Ibs <br />FI' = Fd' = 0.96 Ibs <br />Solve Equation 2.37 <br />eta = taukauCrit = 0.53!32.8 = 0.016 <br />Calculate Algebraic Constants for Equation 2.35 <br />C1 = COS(lambda) = COS(0.002) = 1 <br />C2 = (M/N + 1)/eta = (2.428 + 1)!0.016 = 214.25 <br />C3 = (L1/LZ)SIN(theta) _ (0.25/0.971)SIN(0.1651} = 0.0423 <br />C4 = SIN(lambda) = SIN(0.002) = 0.002 <br />3/4 <br />