A 20-mm-thick steel plate will be used as an axial member to support a dead load of 150 kN and a live load of 220 kN. The yield strength of the steel is 250 MPa. (a) Use the ASD method to determine...

A 20-mm-thick steel plate will be used as an axial member to support a dead load of 150 kN and a live load of 220 kN. The yield strength of the steel is 250 MPa.

(a) Use the ASD method to determine the minimum plate width b required for the axial member if a factor of safety of 1.67 with respect to yielding is required.

(b) Use the LRFD method to determine the minimum plate width b required for the axial member based on yielding of the gross section. Use a resistance factor of

_t
= 0.9 and load factors of 1.2 and 1.6 for the dead and live loads, respectively.