According to NFPA 1960, where should the designated ladder length be marked?

The designated ladder length should be marked on each beam of the ladder, as specified by NFPA 1960. This marking is essential for ensuring that firefighters and other users can quickly and accurately determine the ladder's usable length, which is critical for safety and effectiveness during operations.

By having the designated length marked on both beams, it allows for visibility from multiple angles and further reinforces the understanding of the ladder's capabilities. This is especially important in emergency situations where time is of the essence and firefighters need to make instant decisions about equipment use.

Other locations, such as the ladder’s handle or the base, may not provide clear visibility while the ladder is in use, which could lead to confusion or misjudgments regarding its length. Marking on the heat sensor label would also be impractical, as this label serves a different function related to the condition of the ladder rather than indicating length. The dual beam marking approach ensures a reliable reference for users while maintaining the integrity and safety of the equipment.