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13. Assume we wish to design elevator cables to joist elevators. Lets assume that the capacity, C and the demand, D are both random variables and are normally distributed. If the mean and standard deviation of the capacity is 4000 and 500 lb, respectively, and the mean and standard deviation of the demand is 2000 and 800 lb, respectively. a. Calculate the mean and standard deviation of the safety margin SM-C-D b. How reliable is the elevator designed? What is the probability of failure?
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13. Assume we wish to design elevator cables to joist elevators. Let's assume that the capacity,...
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