Q$3$ Consider the simple truss depicted below with joints at A$,$ B$,$ C$,$ D and EQ$4$ The signboard truss is designed to support a horizontal wind load of $4kN.$ A

separate analysis shows that of this force is transmitted to the center

connection at $C$ and the rest is equally divided between $D$ and $B.$

Determine

$($A$)$ The vector representation of the global reactions

$[10$ Marks$]$

$($B$)$ Using the method of sections determine the magnitude of the

force in member BC$,$ EB and EF$,$ indicate whether these members

are in tension or compression

$[15$ Marks$]$

Determine

$($A$)$ If the truss is statically determinate?

$[4$ Marks$]$

$($B$)$ Draw a free body diagram of the truss and determine the vector

representation of the global reactions

$[8$ Marks$]$

$($C$)$ Using the method of joints determine the magnitude of the force

in members BE and EA$,$ indicate whether they are in tension or

compression

$[13$ Marks$]$