Which type of truss consists of top and bottom chords with a vertical post at the center?

The King Post truss is characterized by its specific structure, featuring a top chord, a bottom chord, and a vertical post located at the center. This unique design allows it to efficiently span moderate distances while providing adequate support. The vertical post effectively transfers the load from the top chord down to the bottom chord, contributing to the overall stability and strength of the truss.

In contrast, the Scissors truss design features sloping members that cross over each other, which creates a more complex shape that is not defined by a vertical post at the center. The Fink truss, on the other hand, employs a different arrangement of web members in a pattern that supports a roof over larger spans, but does not include a central vertical post. As for Web members, they comprise auxiliary components used for stabilization within various truss designs, but do not define a specific truss type with top and bottom chords and a center post.

This distinction clarifies why the King Post truss is the correct answer, as it uniquely describes the structural elements and their arrangement.