When mounting a heavier projector, what is the minimum support requirement for the substructure if the projector and mount weight totals 90 pounds?

When determining the minimum support requirement for a substructure when mounting a heavier projector, it is essential to consider safety factors and building codes. In general practice, a common guideline is to ensure that the mounting support can handle at least five times the weight of the equipment being installed. This is done to account for potential dynamic loads, environmental factors, and the inherent safety of the installation.

In this case, if the weight of the projector and the mount combined is 90 pounds, multiplying this weight by the recommended safety factor of five results in a minimum support requirement of 450 pounds. This approach ensures both the stability of the installation and safety in case of unexpected loads or movements. Therefore, the correct choice reflects a standard practice that emphasizes the importance of overbuilding and adhering to safety guidelines in installations involving heavier equipment.