What are the top and bottom runners for studs in a wood frame building called?

The top and bottom runners for studs in a wood frame building are referred to as the top plate and bottom plate. The top plate is typically the horizontal member that connects the tops of the vertical studs, providing a structure for the roof or ceiling to rest upon and forming the upper boundary of the wall. Conversely, the bottom plate serves as the base for the vertical studs, securing them to the floor and serving as a starting point for the wall assembly. This configuration is essential for the structural integrity and alignment of the wall assembly, ensuring that the studs are anchored and providing a framework for drywall or other wall finishes.

The other terms listed refer to different elements within construction. Rim joists are used in floor framing to close off the ends of joists, headers and trimmers are associated with openings like doors and windows, and frieze and sole may not align with the specific components of wall structure in framing terminology.