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The results of a representative field vane shear test at a site are shown in Figure E12.22a. Previous studies reveal that Λ = 0.8 and λ = 0.12 for the top gray clay layer. These are average values. A building with different column loads is to be erected on the site. Estimate the maximum centric load that a 2-m-square footing can support using CSM. The minimum factor of safety is 1.25 and the settlement should not exceed 25 mm. Assume v' = 0.35.
A 12%,$ 50,000 bond is offered for sale at $45,000. If bond interest is payable monthly and the bond matures in 20 years, what nominal and effective rates of return per year will the purchaser make on the investment
Two rectangular clarifiers(sedimentation basins), each 30 ft long, 15 ft wide, and 10ft deep, settle a combinedtotal of 0.40 mgd following alum coagulation. The effluent channelshave a total weir length of 60ft in each basin
Using the Unified Soil Classification System of the U.S. Army Corps of Engineers, classify the soil. (The fines are easy to crumble when dry and has rapid reaction when shaken.)
The upstream invert is at an elevation of 8ft and the downstream invert 4 ft. If the depth at the upstream end of the culvert is 8 ft, what is the flow through the culvert. Assume the culvert is in inlet control.
What is the Hydraulic Radius of a rectangular channel that has a bottom width of 5 feet and a flow depth is 3.5 feet. Assume the bed slope is 1.5%, and the Manning's roughness coefficient is 0.013.
A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.
Compute the maximum service (unfactored) concentrated live load that can be applied at 1ft from the free end of the cantilever. Use load and strength -reduction factors from ACI Code Sections 9.2 and 9.3. Also check As,min.
Determine the force at the circular endcap and its location relative to the bottom of the pipe. If there is a hinge at the bottom, what external force would need to be applied to the top to prevent rotation
What is the required re resistance rating for the walls around the elevator shafts? For the purposes of this exercise, when referring to Figure 22.7, assume the highest rating requirement where a range of requirements is provided.
Assuming a linear speed-density relationship, the mean free speed is observed to be 60 mph near zero density, and the corresponding jam density is 140 veh/mi.
The water enters at 1 atm at 10 C and the flow rate through the turbine is 40 m3/s. The water is discharged from the turbine 200 m below the intake at 1 atm and the temperature of the water at the discharge is 10.2 C.
Design a simple horizontal curve to connect two roadway tangents that deflect at an angle chosen between 50 and 75 degrees. Assign a station to the curve PI and select a curvature of 6 degrees.
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