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The correct answer regarding the inspection requirements for hangers and seismic braces in concealed spaces is based on the NFPA 25 guidelines, which stipulate that while regular inspections are essential for various components of fire protection systems, certain areas like concealed spaces do not require as frequent inspections as other visible components.
According to NFPA 25, there are no specific periodic inspection requirements set forth for hangers and seismic braces that are located in concealed spaces, provided that they are properly installed and maintained according to the manufacturer's installation instructions and relevant standards. The expectation here is that these components are inherently tied to the overall integrity of the system and are not typically subject to the same levels of wear and tear that would necessitate more frequent inspections.
While visual inspections may be sufficient in some instances, it is crucial to remember that these inspections should be performed to ensure that any signs of deterioration or issues can be flagged. However, there's no mandate for monthly inspections or annual inspections specifically for concealed hangers and seismic braces, as the risk factors differ compared to those readily accessible.
This understanding allows for a balanced approach to fire protection maintenance, focusing resources where they are most needed while upholding safety standards.