xample2.1(a) Find the forces inAB,ADandACin the following Figure E2.1.

(b) Find the forces inEG,FGandFHin the following Figure E2.1.

Figure E2.1

Solution:

FBD of the whole system:

Module 2 :Analysis of Statically Determinate Structures

Lecture 9 :Example for Trusses

(a)FBD of the jointB:

FBD of the jointA:

Force inAB= 22.5kN(Compression).

Force inAD= 37.5kN(Tension).

Force inAC= 30.0kN(Compression).

(b)Take a section throughEG,FG,FHand consider the equilibrium of part at the right side

Force inEG= 36.0kN(Compression).

Force inFG= 22.5kN(Tension).

Force inFH= 18.0kN(Compression).

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