Which type of ladder is designed to be readily moved or carried?

The type of ladder designed to be readily moved or carried is the portable ladder. Portable ladders are specifically built for easy transportation and setup at various locations, making them ideal for tasks that require mobility. They are often lightweight and come in various sizes, allowing users to move them easily from one job site to another.

This design feature sets portable ladders apart from fixed ladders, which are permanently attached to a structure and cannot be relocated. Job-made ladders may also have some level of portability but are typically custom-built for specific tasks and may not offer the same ease of movement as commercially available portable ladders. Extension ladders, while also portable, are specifically designed to be extended to reach different heights, but they still categorize under the broader category of portable ladders. Thus, while extension ladders are movable, the term "portable ladder" encompasses a wider range of designs that prioritize ease of transport and overall versatility.