The two-fire-fighter shoulder can be used with extension ladders up to _____ long.

The two-fire-fighter shoulder carries technique is specifically designed to transport extension ladders safely and efficiently, allowing for better control and balance during the movement. This method is particularly suitable for extension ladders up to 35 feet long because at this length, the weight and bulkiness of the ladder can be effectively managed by two firefighters working in unison.

Extension ladders of this size generally provide sufficient reach for a variety of firefighting scenarios while still being practical for handheld transport by two individuals. Ladders longer than this may exceed what is reasonable for two firefighters to carry safely, which could compromise their safety and effectiveness in a high-pressure situation. Therefore, the two-fire-fighter shoulder method is most suitable for extension ladders that do not surpass this length limit.