What does a C-clamp primarily do in technical theatre?

In technical theatre, a C-clamp is primarily used to hold pieces of scenery, lighting fixtures, or other equipment securely in place. This is crucial during the setup of a production, as it ensures that elements stay stable and do not shift or fall during rehearsals or performances. The design of the C-clamp allows for easy attachment to different structures, such as battens or grids, and its ability to provide a strong grip makes it an essential tool in ensuring that all components are safely secured.

While temporarily holding scenery is a common use for C-clamps, it's important to recognize that their function is specific to providing secure attachment points in various configurations within the theatre environment. The other options, while related to construction and assembly, do not capture the primary role of a C-clamp in the context of technical theatre. For example, C-clamps are not designed primarily for fastening wood for structural integrity, creating flush surfaces, or joining separate structures in a way that those tasks would typically require specialty fasteners or connectors.