Which type of truss has parallel top and bottom chords?

Parallel Chord Trusses have top and bottom chords that are parallel to each other, which gives them their name. This design facilitates even load distribution and is particularly advantageous in scenarios where architectural considerations require a flat ceiling or unobstructed space beneath the truss. The geometry allows for efficient construction and can be engineered to support significant loads while maintaining a lighter structural weight compared to other truss types.

Other truss designs, such as Scissor, King Post, and Queen Post Trusses, do not feature parallel top and bottom chords. For instance, Scissor Trusses are designed with crisscrossing members, creating a sloped ceiling, while King Post and Queen Post Trusses utilize vertical and diagonal members to create a peaked shape with a central vertical post and additional structural support. Each of these configurations serves different architectural and load-bearing needs but lacks the parallel chord characteristic of Parallel Chord Trusses.