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20-12-2022
Engineering

Answered

You have been asked to design a flexible pavement, and the following daily traffic is expected for design: 5000 single axles at 10,000 lb eacg, 400 single axles at 24000 lb each, 1000 tandem axles at 30000 lb each and 100 tandem axles at 50000 lb each. There are three lanes in the design direction ( conservative design is to be used). Reliability is 90% , overall standard deviation is 0. 40, ∆PSI is 1. 8, and the design life is 15 years. The soil has a resilient modulus of 13,750 psi. If TSI is 2. 5, what is required structural number?

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