Problem 424 - Method of Joints Checked by Method of Sections

Problem 424
For the truss shown in Fig. P-424, determine the force in BF by the method of joints and then check this result using the method of sections. Hint: To apply the method of sections, first obtain the value of BE by inspection.



Problem 424

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How did you take the direction of force on the joint ?

Jhun Vert's picture

An easier to handle direction of forces is by assuming all are tension (going away from joints). If your answer is positive then the assumption is correct. If the answer negative then the assumption is wrong, in means the correct direction is towards the joint (compression).