What is the purpose of the rungs on a ladder?

The purpose of the rungs on a ladder is to support the weight of the climber. Each rung is designed to bear the weight of a firefighter and any equipment they may carry while climbing the ladder. The materials and construction of the rungs are specifically chosen to ensure they can withstand the load safely, allowing for secure ascent and descent.

While aspects such as structural stability, the use of safety harnesses, and maintaining the ladder's position are important for overall ladder performance and safety, they do not pertain to the specific function of the rungs themselves. Rungs are primarily intended for the user to step on, making it crucial that they are sturdy and reliable for climbers during an emergency or rescue operation.