Ladders must be marked with their proper numerical what?

Ladders must be marked with their proper numerical length to ensure that firefighters can easily identify the correct size for various tasks at hand. Marking the length aids in planning for safe deployment, as the ladder must reach the required height needed for effective rescue and firefighting operations while considering safety protocols and structural features of buildings. Accurate labeling prevents confusion or mistakes during emergencies, which can be critical in time-sensitive situations. While weight, height, and width are relevant characteristics of ladders, the length is particularly crucial for operational readiness and safety, facilitating proper use depending on the specific circumstances encountered during firefighting efforts.