Consider the following structure:\ (a) Calculate the reaction forces at joints

A

and

E

(i.e.,

F_(A)

and

{:F_(E))

. ( 30 pts)\ (b) Calculate the forces in the following section bars and indicate whether they are under tensile\ or compressive stress:\ (i)

AB

; (ii)

AF

; (iii)

BC

; (iv) BF; (v) CF (50 pts)\ (c) If the bars are cylindrical and made of stainless steel (yield strength

=205MPa

, tensile strength\ =

515MPa

), calculate the minimum diameter so that bar AF will not experience any plastic\ deformation. (20 pts)

Consider the following structure: (a) Calculate the reaction forces at joints A and E (i.e., FA and FE ). ( 30 pts) (b) Calculate the forces in the following section bars and indicate whether they are under tensile or compressive stress: (i) AB; (ii) AF; (iii) BC; (iv) BF; (v) CF (50 pts) (c) If the bars are cylindrical and made of stainless steel (yield strength =205MPa, tensile strength = 515MPa ), calculate the minimum diameter so that bar AF will not experience any plastic deformation. (20 pts)