Beam Analogy

In this method, the internal forces are found assuming the elongated truss is a beam. This is an approximate method.

Here:

• Chord members - horizontal members
• Web members - diagonal members
• $d$ - truss depth

In the truss,

• Bending moment is carried by chord members.
  $\text{Bending moment}=F_{\text{chord}}\times d$
• Shear force is carried by vertical component of web member force