A frame is formed by two metallic rectangular cross sectional parts soldered along their...

A frame is formed by two metallic rectangular cross sectional parts soldered along their inclined planes as illustrated in Fig. P1.6. What is the permissible axial load P_all that can be applied to the frame, without exceeding a normal stress of or a shearing stress of T_all on the inclined plane? Given: a = 10 mm, b = 75 mm, t = 20 mm,  Θ= 55°,  = 25 MPa, and  = 12 MPa. Assumption: Material strength in tension is 90 MPa.