What type of support is necessary when independent support wires are used in a ceiling assembly?

When utilizing independent support wires in a ceiling assembly, it is essential to have secured supports in place. This requirement ensures that the wiring is anchored appropriately, maintaining stability and integrity within the installation. Secured supports effectively hold the independent support wires, preventing any potential sagging or shifting over time, which could lead to safety issues or code violations.

In specific applications, such as lighting fixtures or other suspended systems, the necessity of firmly securing these supports becomes even more critical, as any movement could compromise the connected equipment's functionality and safety.

The other options—steel brackets, concrete anchors, and springs—though potentially useful in certain scenarios, do not fulfill the specific requirement of providing secure support for independent support wires. While steel brackets might be used in some structural applications, they aren't designed explicitly to secure support wires. Similarly, concrete anchors are used for fastening in concrete but are not typically utilized directly with support wires in ceiling assemblies. Springs, on the other hand, do not serve as a reliable means of securing wires, as they are more suited for applications where flexibility is required rather than stability. Thus, secured supports remain the most appropriate choice for this context.