Chapter 21, Problem 28QAP

GROUP 1 Design a simply supported prestressed beam to support a parking space with a harped tendon using the ACI 318 Building Code allowable stresses. The span length will be decided by the pair. The pair has to choose a suitable sustained service live load (from 300-1500plf) and superimposed dead load (50-150plf) and has no concrete topping. Assume the beam is made of normal-weight concrete with fc'= 5,000 psi and that the concrete strength f'ci at transfer is 70 percent of the cylinder strength. . Also, the pair must assume a justifiable time-dependent loss. • Assume that that fu = 260,000 psi for stress-relieved tendons, ft = 12sqrt(fc'). THE PAIR MUST BE ABLE TO DEFEND THE LENGTH OF BEAM, AND THE LOADINGS APPLIED ON THE BEAM. DEFEND THE USAGE OF YOUR SELECTED SECTION TYPE

A trapezoidal drainage ditch along a highway system has a side slope of 2:1 anda bottom width of 8.0 ft. The ditch is to be used to discharge a flow of 500 ft3/sec.If the ditch slope (longitudinal) is 1.0% and the Manning coefficient is 0.02,determine the minimum depth required for the ditch. Is the flow supercritical orsubcritical? Justify your answer.

Software developers need to comply with organisational requirements stated in policies, procedures and guidelines. In addition, they need to comply with any legislative requirements applicable to the software languages and tools they use. Identify two areas where legislative requirements may apply to software development. Select one (1) correct response. Question 18 options: Pricing and licensing Licensing and copyright Copyright and validation