What is the proper nozzle pressure for a high-rise lead out using three lengths of 2½" hose?

The proper nozzle pressure for a high-rise lead-out using three lengths of 2½" hose is indeed 60 psi. This standard pressure is established based on the hydraulic calculations and considerations unique to high-rise fire operations.

When operating in a high-rise environment, it's critical to ensure adequate pressure at the nozzle to overcome the elevation pressure loss that occurs as water is transported up multiple floors. The choice of 60 psi as the nozzle pressure provides a balance between sufficient discharge force while ensuring manageable flow rates that can be supported by the engine's pump.

This pressure is designed to optimize performance and allow firefighters to effectively apply water to the fire while also facilitating easier handling of the hose by crew members. Proper nozzle pressure is integral to maintaining effective fire suppression and ensuring safety during operations in such challenging environments.