$=1ND$

Show that the truss is statically determinate externally and overall and stable. Draw the equivalent

beam with loads and reactions shown. Calculate the values of the reactions. For member forces

ust state if they are in tension, compression or are zero$-$force members. Show your answers in the

spaces provided.

Draw the equivalent beam for the truss, including support conditions and loads.

Is the truss externally determinate? $($Can you calculate the reactions using only equilibrium?$)$

Yes No

Is the truss determinate overall? $($Can you caleulate the reactions and internal forces using only

equilibriam?

$|$ Yes No

Is the truss stable both externally and overall?

$|$Yes $|$ No

Values of the Reactions:

Member Forces $($

T$.$CO$)$:

SOLUTION

You should show all work for determining the reactions. Include FBDs and equilibrium equations

used in the solution. But for determining member forces, this can be done with just balancing the

forces $($drawing arrows$).$ Note that in some cases, calculations of the values of a few member

forces are necessary to the overall solution. Work your way through the truss member by

member, balancing force arrows both vertically and horizontally. Make unambiguous decisions

here Be certain about whether the member is in tension, compression, or is a zero$-$force member:

If you make a mistake, it may often cause errors in the subsequert members.