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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
An equal tangent vertical curve connects a -2% and a +3% grade. The low point of the curve is at elevation 297.88 ft. If the PVI is at elevation 295 ft, what is the design speed of the curve
At that time, there is no more fuel in the rocket engine and the rocket continues upwards in free fall (g=0 ft/sec/sec). (a) How high will the rocket reach before it begins to fall back to the campus
How many 34-inch diameter rivets are required to transmit 55,000 lb from the two angles to the gusset plate if the allowable shear stress in the rivets is 15,000 psi. Assume each rivet carries the same amount of load.
Two pipes of identical length and material are connected in parallel. The diameter of one is twice the diameter of the other. What is the ratio of the flow rates (Q2/Q1) in the two pipes
The velocity out of the tube may be approximated by V = √(2(p-patm)/ρ), where p is the absolute tank pressure. Determine the time at which the pressure (gage) in the tank is 20 kPa if the initial pressure is 40 kPa (gage)
If a single deposit of $15,000 is invested at 2.75% yearly interest, what equal year-end withdrawls can be made each year for 10 years, leaving nothing in the fund after the 10th withdrawl
A gas bubble is formed at the tip of a small tube which is completely immersed in a large body of liquid. The bubble remains in contact with the open end of the tube in a way that allows us to control the pressure P inside the bubble.
You are the winner of a sweepstakes and given a choice of a one-time payment of $1,000,000 or a guaranteed $80,000 per year for 20 years. Assume that you will collect all 20 years regardless of health condition.
Two passenger cars are traveling at 65 MPH on a highway moving in the same direction in the same lane. The cars are separated by 25 feet for every 10 MPH of their speed. The coefficient of friction (skidding resistance) between the tires and the r..
A solid circular shaft AC of total length L=L1+L2 is fixed against rotation at ends A and C and is loaded by a tourqe T_b at joint B. If the diameter of the two segements of the shaft are in ratio d2/d1
The first alternative is deep-well pumping at an annual cost of $10500. The second alternative is to instal an 18 inch diameter pipeline from a local surface reservoir at a first cost of $25000 and an annual pumping cost of $7000.
What mass (in grams) of steam at 100°C must be mixed with 387 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 26.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, ..
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