What describes ceiling joists?

Ceiling joists are indeed horizontal members that are typically found within the framework of a building's ceiling system. They are installed parallel to the floor and are specifically designed to provide support for the ceiling material while also helping to create a level surface. In addition to this function, ceiling joists work in conjunction with rafters, which are inclined members that support the roof. This relationship enhances the structural integrity of both the ceiling and the roof assembly.

While ceiling joists may assist in supporting some roof elements, they do not operate exclusively with roof joists. Instead, they play a pivotal role in maintaining the overall stability of the structure by distributing loads and providing a surface for the ceiling finish. This cooperative backing of the ceiling is crucial in ensuring that loads from the ceiling do not compromise the integrity of the roof system, making the interaction between ceiling joists and rafters vital in construction.