$P_1=460(N)$

$P_2=345(N)$

$A_1=115(m{m}^2)$

$A_2=101(m{m}^2)$

$A_3=115(m{m}^2)$

$L=89(mm)$

$E=20000(\frac{N}{m}{m}^2)$

Solve the $1-$dimensional space truss system given in the figure :

Requirements;

$1-$Number the elements and nodes

$2-$ Write the connectivity table

$3-$ Specify boundary conditions

$4-$ Stiffness matrices of the elements

$5-$ Global Stiffness Matrix $($Specify the variables in the matrix$)$

$6-$Calculate node displacements

$7-$ Calculate reaction forces

$8-$Calculate element stresses