To ensure stability, how many rungs at the top of step ladders should be avoided?

Avoiding the top two rungs of a step ladder is crucial for ensuring stability and safety during use. The top two rungs often lack adequate support for the user's balance, significantly increasing the risk of falls. When standing on these higher sections, a person may not have a secure center of gravity, making it more difficult to maintain stability while reaching or performing tasks.

Additionally, the design of many step ladders includes safety warnings and guidelines that specifically advise against utilizing the top rungs for this reason. By adhering to this recommendation, users can prevent accidents and injuries, ensuring a safer work environment, especially in horticultural practices where ladders are commonly used for tasks such as pruning or harvesting.