With stabilizers deployed, the aerial ladder must be capable of raising from bedded position to maximum elevation and extension at which angle?

• A. 75 degrees
• B. 90 degrees
• C. 100 degrees
• D. 120 degrees

Answer: (B)

The main idea is that with stabilizers set, the aerial ladder is allowed to reach its full, safest range of motion to maximize height. When the ladder is raised to a right angle to the ground, i.e., 90 degrees, you get the greatest vertical reach while maintaining stability and the ability to extend the ladder fully. Angles less than 90° reduce vertical height, and angles greater than 90° push the ladder past vertical, which isn’t the designed position for maximum elevation with the stabilizers in place. So the best angle for maximum elevation and extension is 90 degrees.