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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 psicolumn f'c = 5500 psify = 60,000 psi
The magitude of the power input to the compressor is 7,5kW and there is heat tranfser from the compressor to the surroundings at a rate of 0.15kW. Kinetic and potential energy are negligible.
The air above the liquid is under a pressure of 5 psig, and the specific gravity of the liquid in the tank is 0.80. If the rectangular gate is 6 ft wide and if y1 = 1 ft and y2 = 10 ft, what force P is required to hold the gate in place
Two glass capillary tubes of inside diameters of 20 and 13 microns are used to test the capillary rise in an annular cross section .The wall thickness of each capillary is 2 microns .The smaller capillary tube is inserted in the larger one so that..
Investigate the possibility of environmental problems that faced by the area of disaster.
The maximum gage pressure is known to be 8MPa in a spherical steel pressure vessel having a 250mm diameter and a 6mm wall thickness. Knowing that the ultimate stress in the steel used is (sigma u)= 400MPa, determine the factor of safety with respe..
Assuming D/D/1 queuing, when does the initial queue clear and what are the total delay, the average delay per vehicle, longest queue length (in vehicles), and the wait time of 100th vehicle to arrive (assumin first-in-first-out)
This distance is indicated correctly on a steel surveyor's tape whenused at a temperature of 70 degrees F and subjected to a pull of 10lbs. If in measuring a certain distance the tape indicatesthe distance to be 100 feet
Determine the volume of direct surface runoff in acre-ft that will result from the following storm. The basin area is 1000 acres. The phi index is 0.5 in./hr. 30-minute period 1 2 3 4 Rain intensity (in./hr) 0.9 0.5 0.6 0.5
Determine the number of completely mixed chlorine contact chambers each having a detention time of 30 min that would be required in a series arrangement to reduce the bacterial count of a treated effluent form 10^6 to 14.5 organisms/mL
If D1 = 60 cm, D2, = 40 cm, D3 = 54 cm, L1 = 400 m, L2 = 450 m, and L3 = 750 m. Assume f = 0.0125 (3 riveted steel pipes). Determine the total flow if the system head loss is 60 m.
An activated sludge process receives 4000m^3 / day containing 120 mg BOD /L from the primary settling tank and 3500 m^3/day Containing 25mg BOD/L from the secondary settling tank.
Determine from curve (a) critical depth (b) the maximum flow rate (c) the flow rate at a depth of 2.4 m and (d) the depths at which flow rate of 28.3 m^3/s may exist and the flow conditions at these depths.
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