What criteria must a footing structure meet for a sprinkler system?

A footing structure for a sprinkler system is crucial because it provides the necessary support for both the weight of the components and the operational stresses that occur during the system's function. When selecting or designing a footing, it is essential that it can withstand not only the static load of the sprinkler system but also dynamic loads that might occur during operation, such as seismic activity or water pressure surges. This ensures stability and safety, preventing potential failures that could compromise the effectiveness of the fire protection system.

While the other options present specific scenarios regarding footings, they either limit the material choice unnecessarily, imply unnecessary maintenance requirements, or focus on position rather than the key aspect of structural integrity. Thus, the requirement that footings adequately support the system captures the primary concern of maintaining functionality and safety within the sprinkler system installation as outlined in NFPA 13.