Name: M Date: : September 30th Problem 1 30th 2016 A steel column of hollow circular cross sec- tion is supported on a circular steel base plate and a concrete pedestal (see figure). The column has outside diameter d= 250 mm and supports a load P = 750 kN. = (a) If the allowable stress in the column is 55 MPa, what is the minimum required thickness t? Based upon your result, select a thickness for the column. (Select a thickness that is an even integer, such as 10, 12, 14, ..., in units of millimeters.) (b) If the allowable bearing stress on the concrete pedestal is 11.5 MPa, what is the minimum required diameter D of the base plate if it is designed for the allowable load Pa that the column with the selected thickness can support? allow P Column Base plate P