Luminaires attached to suspended ceiling framing members must be secured using which methods?

Luminaires attached to suspended ceiling framing members must be securely fastened using bolts or screws to ensure that they remain firmly in place and do not pose a safety hazard. This method provides the necessary mechanical support and stability required for lighting fixtures, especially in environments where movement, vibrations, or accidental contact could dislodge inadequately secured luminaires.

Bolts or screws create a secure attachment point that can withstand forces such as those from maintenance activities or accidental bumps. This is crucial for maintaining the integrity of the electrical connection and ensuring that the luminaire operates safely and effectively.

Other methods like nails, glue, or Velcro do not provide the structural integrity and reliability needed for ceiling-mounted luminaires. Nails may not hold adequately over time, glue lacks the mechanical strength required for the weight and potential movement of luminaires, and Velcro is not suitable for permanent mounting given that it is typically designed for temporary applications. Therefore, the use of bolts or screws is mandated to comply with safety codes and best practices in lighting installation.