What is the key difference between Class I and Class II standpipe systems?

The key difference between Class I and Class II standpipe systems is that Class I is designed primarily for use by fire departments, while Class II is intended for use by building occupants. Class I standpipe systems provide 2½-inch hose connections that are typically used by trained firefighters, allowing them to connect their hoses and effectively manage larger fire incidents. On the other hand, Class II standpipe systems are equipped with 1½-inch hoses for use by building occupants or trained personnel to handle smaller fires or to assist in the initial firefighting efforts before professional firefighters arrive.

This distinction is critical because it informs the design, accessibility, and operational parameters of each system, ensuring that they meet the needs of their respective users effectively. Understanding this difference also highlights the roles that different types of standpipe systems play in overall fire safety and emergency response plans within buildings.