What do the beams of a ladder directly support?

The correct answer is that the beams of a ladder directly support the rungs. The beams, which run the length of the ladder, provide the primary structural integrity and strength necessary to support both the weight of individuals using the ladder and any additional loads placed upon it. The rungs, which are the horizontal steps of the ladder, are attached securely between the beams, allowing them to bear weight safely.

Understanding this support structure is crucial for ensuring that the ladder is used correctly and safely. While the base, spurs, and safety locks contribute to the overall stability and safety of the ladder, it is the beams that serve as the main framework to support the rungs, which are essential for climber access and safety.