The steel pipe is supported on the circular base plate and concrete pedestal. If the nor...

The steel pipe is supported on the circular base plate and concrete pedestal. If the normal failure stress for the steel is ( σ_fail ) _st = 350 MPa, determine the minimum thickness t of the pipe if it supports the force of 500 kN. Use a factor of safety against failure of 1.5. Also, find the minimum radius r of the base plate so that the minimum factor of safety against failure of the concrete due to bearing is 2.5. The failure bearing stress for concrete is ( σ_fail ) _con = 25 MPa.