What term refers to the upper part of a truss in construction?

The term that refers to the upper part of a truss in construction is "Chord." In the context of trusses, which are structural frameworks typically used in roofs and bridges, the upper member of the truss is specifically called the chord. The chord provides support to the truss and helps to distribute loads.

In a simple triangular truss design, the top beam is the top chord, while the bottom member is known as the bottom chord. These chords work together with other components such as webs or diagonal members to create a strong, stable structure. Understanding this terminology is critical for those involved in construction and structural engineering, as it helps in communicating effectively about design plans and engineering analysis.

The other terms, while related to the construction industry, do not specifically refer to the upper part of a truss. Rafters, for example, are inclined structural members that support the roof but are not the upper component of a truss itself. A beam is a broader term that refers to a horizontal structural element, and struts are used to resist compression within a framework. Each of these plays distinct roles in construction, but "Chord" is the correct term for the upper part of a truss.