In a parallel chord truss, the top chord is subject to what type of force?

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Enhance your skills with the Art of Reading Buildings Test. This test features multiple choice questions, each equipped with hints and explanations to aid in your learning. Prepare effectively for your upcoming exam!

Multiple Choice

In a parallel chord truss, the top chord is subject to what type of force?

Explanation:
In a parallel chord truss, the members are treated as two‑force members that carry axial forces only. Under vertical loads, the truss tends to bend, placing the upper path of members in compression while the lower path carries tension. The top chord shortens under load, resisting being pushed together, which is why it experiences compression. The bottom chord lengthens and carries tension, and the diagonals help transfer shear between the chords. Shear and bending are not the primary forces in a truss member, since joints are pinned and members are chosen to act axially.

In a parallel chord truss, the members are treated as two‑force members that carry axial forces only. Under vertical loads, the truss tends to bend, placing the upper path of members in compression while the lower path carries tension. The top chord shortens under load, resisting being pushed together, which is why it experiences compression. The bottom chord lengthens and carries tension, and the diagonals help transfer shear between the chords. Shear and bending are not the primary forces in a truss member, since joints are pinned and members are chosen to act axially.

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