What are the three main types of ladders covered in ladder safety training?

The three main types of ladders covered in ladder safety training are step ladders, extension ladders, and single ladders.

Step ladders are self-supporting, allowing users to work at various heights without additional support. They are commonly used in both residential and commercial settings for tasks that require reaching up to a moderate height, such as changing light bulbs or accessing high shelves.

Extension ladders are designed to reach greater heights and can be extended by sliding sections apart, making them versatile for tasks such as painting the exterior of buildings or accessing roofs. They require stable base support and are used where more vertical reach is necessary and safety measures must be strictly adhered to due to their height.

Single ladders, often referred to as straight ladders, consist of one length and lean against a surface. They are useful for accessing heights but require a reliable angle and support to ensure safety.

The other options list combinations of ladder types that are either less common or do not encompass the primary categories recognized in safety training, which emphasizes proper use and safety measures associated with step, extension, and single ladders.