Interior partitions (nonbearing) may be constructed with at least how many top plates?

Interior nonbearing partitions can be constructed with a single top plate. This is the minimum requirement according to building codes and construction standards. A single top plate helps secure the studs that make up the partition while allowing for adequate support without the need for additional weight or material that a double or triple plate would add.

Using a single top plate is typically sufficient for nonbearing partitions because these walls do not need to support any load from above, such as roofs or structural beams. It allows for easier installation and reduces material costs, which is particularly relevant in residential construction where efficiency and budget are often critical factors.

While double and triple top plates can provide extra support for load-bearing walls or enhance structural integrity, they are not necessary for nonbearing partitions where only basic separation of spaces is required. Thus, a single top plate meets the structural requirements without unnecessary complication.