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A combined footing is subjected to an exterior 16 in. x 16 in. column abutting the property line carrying a total service load Pw = 300,000 lb and an interior column 20 in. x 20 in. carrying a total factored load Pw = 400,000 lb. The live load is 30% of the total load. The center-line distance between the two columns is 22'-0". Design the appropriate reinforced concrete footing on a soil weighing 135 pcf. The bearing capacity of the soil at the level of the footing base is 6000 lb/ft2. The frost line is assumed to be at 3'-6" below grade. Assume a surcharge of 125 psf at grade level. Given:
footing f'c = 3500 psi
column f'c = 5500 psi
fy = 60,000 psi
A water tank has a height of 120m, and its area of cross-section is 2000m. Water is released from the tank and the water level drops by 1 meter every minute. Find the rate of change in volume.
Air at 200 kPa and 950 K enters an adiabatic nozzle at low velocity and is discharged at a pressure of 80 kPa. If the isentropic efficiency of the nozzle is 92%, determine the temperature and velocity of the air at the exit.
find the volume of the given solid region bounded below by the cone z=sqrt(x^2+y^2) and bounded above by the sphere x^2+y^2+z^2=128. using triple intergrals.
Calculate and plot the distribution of total and effective vertical stresses as well as pore-water pressure with depth from the ground surface up to the bedrock surface.
Determine the softening point of bitumen within the range 30 to 157°C by means of the Ring-and-Ball apparatus - discussion for softening point of bitumen 7.5oC
the most famous geyser in the world old faithful in yellowstone national park has a mean time between eruptions of 85
Deflection of a Beam, If a beam of lenght L is fixed at the ends and loaded in the centre of the beam by a point load of F newtons the deflection
Two pounds of an ideal gas are contained within a piston-cylinder arrangement. The initial volume and pressure are 1 ft3 and 75 psia respectively. The final volume is 3 ft3.
A piston-cylinder device contains 0.85 kg R-134a at 263K. The piston is free to move and has a mass of 12 kg and diameter of 25 cm. The atmospheric pressure is 98 kPa. Heat is added to the cylinder until the R-134 temperature = 10 o C.
A falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm. In 1 hour the head in the standpipe of diameter 5 mm dropped from 68 cm to 50.2 cm. Calculate the hydraulic conductivity of this clay.
A 2-inch diameter glass pipe is connected to a pipe network in which the pressure is 70 psig. If the length is 300 ft and the outlet is 10 ft above the pipe, determine the flow rate.
A reinforced concrete column has 6 steel rods inserted in the column and the apparatus is subjected to a temperature drop of 90degrees F. from its stress free state.
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