How frequently must exhaust ducts be supported and secured during installation?

In the context of the North Carolina Mechanical Code, exhaust ducts must be adequately supported and secured during installation to ensure safety and proper function. The requirement for supporting exhaust ducts every 4 feet is established to prevent sagging and stress on the ductwork, which could lead to misalignment or damage over time.

Proper support helps maintain the structural integrity of the duct system, ensuring that airflow is not hindered and that the system operates efficiently. If ducts are spaced further apart than 4 feet without proper support, they may become prone to movement or collapse, particularly in environments where they may be subjected to vibration, temperature changes, or physical contact.

This organization of support also makes it easier for maintenance and inspection, as securely mounted ducts are less likely to have hidden issues that could lead to system failures or inefficiencies. Therefore, adhering to the 4-foot support rule is essential for safe and efficient duct installation in mechanical systems.