Single ladders are non-adjustable in length. True or False?

Single ladders are indeed non-adjustable in length, which is why the answer is true. A single ladder, often referred to as a straight or extension ladder, is constructed in such a way that its length remains fixed once it's manufactured. This design feature provides stability and strength, making it suitable for tasks that require reaching a specific height without the need for adjustment.

Other ladder types, such as extension ladders, are designed with features that allow for length adjustments, enabling users to extend or shorten them based on their needs. Since single ladders do not incorporate these mechanisms, they serve a specific purpose of providing a reliable reach without the complexity of adjustable components. This characteristic is essential for ensuring safety, as any adjustments can potentially introduce instability and increase the risk of accidents.