How many types of ground ladders must an aerial apparatus have?

An aerial apparatus is required to have three types of ground ladders to ensure comprehensive operational capabilities and safety during firefighting and rescue operations. These categories typically include:

1. Extension ladders: Designed to reach higher areas, these ladders can be extended to various lengths, allowing firefighters to access multiple stories of a structure.

2. Folding ladders: These are compact and used for quick access in tight situations, often deployed for interior work or when full height is not needed.

3. Straight ladders: Also known as single ladders, they provide a reliable means to quickly reach elevated levels, particularly useful for short climbs or for accessing windows and roofs.

Having these three types of ladders ensures that firefighters can adapt to various scenarios they may encounter on the fireground, enhancing both their agility and safety. The diversity in ladder types allows for specialized approaches to different incidents, providing the necessary tools to address unique challenges when responding to fires or performing rescues.